BAOSTEEL METAL / STAINLESS STEEL WIRE

304 Stainless Steel Wire

UNS S30400 · 18-8 AUSTENITIC STAINLESS · ASTM A580/A580M-23

Cold-Drawn WireAnnealed / Cold-Worked OptionsCoils & Spools by OrderBulk Industrial Supply

Diameter & temper matchingMill-document requirements

WIRE GRADE 304 / EN 1.4301

Precision-focused stainless wire procurement for drawing, weaving, forming and fabrication.

Buy 304 stainless steel wire with an agreed diameter, delivery condition, surface finish, tensile requirement and coil or spool configuration. BAOSTEEL METAL coordinates your material specification, inspection requirements and bulk quotation.

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Real factory photograph of shiny thin 304 stainless steel wire wound on metallic industrial spools and plain loose coils, no text, no overlays

8 Million MTActual annual steel output across product families

1 Million MTCombined regular inventory across steel categories

500,000 m²Factory area

1,000+Company employees

PRODUCT OVERVIEW

304 Stainless Steel Wire for Industrial Conversion

Specify a wire product, not merely the steel grade. Procurement accuracy starts with temper, diameter and finish.

What Is 304 Stainless Steel Wire?

Grade 304 (UNS S30400) is an austenitic chromium-nickel stainless steel used for wire products requiring general corrosion resistance and practical formability. In wire form, the final cold-working or annealing condition has a major influence on strength and bending behavior.

Core alloy: 18–20% chromium and 8–10.5% nickel (reference Type 304 limits).
Product: stainless steel wire in coils; spool or reel packing can be requested.
Order condition: specify annealed/soft or cold-worked condition, plus any target tensile range.
End uses: mesh fabrication, ties, wire forms, screening and qualified spring-wire uses.

Wire vs wire rod: finished 304 wire is ordered by its actual diameter, condition and surface. Hot-rolled stainless wire rod is a semifinished input and must be specified separately.

Purchase-Order Essentials

Include the exact information needed to quote the same item across suppliers and producing mills.

On smaller screens, swipe the table horizontally to see all columns.

Specify	Buyer requirement
Grade	Type 304 / UNS S30400 / EN 1.4301
Wire specification	ASTM A580/A580M-23 (or contracted edition)
Dimension	Wire diameter (mm), permissible deviation, roundness
Condition	Annealed (Condition A), cold worked (Condition B), or other applicable agreed wire condition
Finish	Cold drawn, bright as negotiated, annealed and pickled, or project-defined
Packing	Coil/spool inner and outer dimensions, net unit mass, number of units
Documents	MTC, heat identity, test records and any agreed inspection

SPECIFICATIONS & ORDERING

304 Stainless Steel Wire Specifications

Diameter, delivery condition and unit packaging determine whether the wire meets your fabrication process.

Technical Specifications

On smaller screens, swipe the table horizontally to see all columns.

Item	Reference / ordering requirement
Grade / UNS	304 / S30400
Material family	Austenitic chromium-nickel stainless steel
Main product standard	ASTM A580/A580M-23
General wire requirements	ASTM A555/A555M-23
Reference inquiry diameter	Ø0.20–6.00 mm; actual supply capability and diameter tolerances to be confirmed
Cross-section	Round is the default page focus; shaped wire subject to feasibility
Condition / temper	Annealed (A) / cold-worked (B); finer temper bands negotiated
Surface	Cold drawn / bright finish by agreement / annealed and pickled
Delivery	Coils, spools or reels where available; straightened lengths require a separate item quote
Inspection	Chemistry, diameter, surface, tensile testing as specified

The diameter range is an indicative enquiry range, not a live stock list. ASTM A580/A580M covers wire furnished in coils; cut straight bar belongs to a different product scope.

Choose the Correct Wire Before Pricing

Final use: mesh, binding, wire formed parts, weaving or spring manufacturing.
Required wire diameter tolerance or the drawing standard used in your factory.
Minimum/maximum tensile strength or the requested material condition.
Surface brightness, lubricant residue, cleanliness and corrosion-control packing.
Coil inside diameter, spool flange width, package net mass and total quantity.

Supply note: special spring wire and weaving wire may require ASTM A313/A313M or ASTM A478, respectively. Refer to the applicable product specification on the purchase order.

DIMENSIONAL PLANNING

304 Stainless Wire Diameter & Theoretical Weight Chart

Reference diameters and wire running mass for estimating production and shipment requirements.

On smaller screens, swipe the table horizontally to see all columns.

Nominal wire diameter (mm)	Theoretical g/m	kg per 1,000 m	kg per 100 m
Ø0.2	0.249	0.249	0.025
Ø0.3	0.561	0.561	0.056
Ø0.5	1.557	1.557	0.156
Ø0.8	3.986	3.986	0.399
Ø1	6.228	6.228	0.623
Ø1.2	8.969	8.969	0.897
Ø1.5	14.013	14.013	1.401
Ø2	24.913	24.913	2.491
Ø2.5	38.926	38.926	3.893
Ø3	56.054	56.054	5.605
Ø4	99.651	99.651	9.965
Ø5	155.705	155.705	15.571
Ø6	224.215	224.215	22.422

Theory based on a solid round section and a reference 304 density of 7.93 g/cm³; actual mass differs with diameter tolerance and end packaging.

Why wire weight matters: for thin-gauge wire, order length can reach thousands of metres per coil. Use calculated running mass to estimate consumption, then confirm the supplier’s net spool or coil weights.

Need a size not shown in the reference table?

Send the diameter, tolerance, desired condition and required weight. We will check production feasibility.

APPLICABLE STANDARDS

ASTM A580, A555, A313 and A478: Select the Right Scope

Separate general wire supply from specific spring-wire, weaving-wire and straight bar product standards.

Wire Standards by End Use

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Standard	Intended relevance
ASTM A580/A580M-23	General stainless steel wire, including round and certain shaped wire in coils.
ASTM A555/A555M-23	General delivery requirements for stainless steel wire and wire rod; the specific material standard takes priority.
ASTM A313/A313M-18(2025)	Stainless spring wire; use when the actual application calls for spring-wire requirements.
ASTM A478-97(2019)	Chromium-nickel weaving and knitting stainless steel round wire.
ASTM A276/A276M-25	Stainless steel bars and shapes; separate from coiled wire supply.

How to Write a Clear Specification

For general-use 304 wire, the purchase order should identify a wire standard and condition, rather than borrowing mechanical properties from 304 sheet or bar.

Start with Type 304 / UNS S30400 and the target application.
Name ASTM A580/A580M edition for general-purpose wire supply.
Add diameter, tolerance, cross-section and surface condition.
Agree required tensile range, inspection plan and spool/coil configuration.
For weaving or spring products, agree the specific wire standard and certification package.

Hierarchy: where referenced ASTM general requirements and material requirements conflict, apply the specific material standard first.

COMPOSITION

304 Stainless Steel Wire Chemical Composition

The nominal 18-8 alloy balance forms the core of a precise Type 304 purchasing specification.

Grade 304 Chemical Composition (wt. %)

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Element	Reference Type 304 requirement
Carbon (C)	≤0.080
Manganese (Mn)	≤2.00
Phosphorus (P)	≤0.045
Sulfur (S)	≤0.030
Silicon (Si)	≤1.00
Chromium (Cr)	18.00–20.00
Nickel (Ni)	8.00–10.50
Nitrogen (N)	≤0.10

Values are reference chemistry for Type 304 / UNS S30400 in stainless wire product specifications. The purchased ASTM edition, producer analysis and any special purchaser limits govern acceptance.

Why 18-8 Chemistry Matters

Chromium supports a passive surface film while nickel stabilizes the austenitic structure. Performance also depends on exposure conditions and surface finish.

Cr 18–20%: supports general-purpose corrosion resistance.
Ni 8–10.5%: contributes to an austenitic balance and ductility.
C ≤0.08%: identifies Type 304; consider 316L or lower-carbon grades where a project requires a different corrosion/welding strategy.
Traceability: require heat analysis or a mill report matched to the delivered lots.

For sustained chloride-rich or marine service, material choice must consider actual exposure; 316L can be preferred due to molybdenum. A successful application is not guaranteed by grade alone.

STRENGTH & DUCTILITY

304 Stainless Steel Wire: Annealed vs Cold Worked

The finished wire condition, not just the 304 grade name, controls tensile strength and forming behavior.

Mechanical Properties Depend on Temper

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Delivered condition	Typical procurement meaning
Annealed / Condition A	Annealing is the final heat treatment, with possible finishing draw for size or surface. Select when softer forming behavior is required.
Cold-worked / Condition B	Wire is cold worked to increased strength. Specify the target tensile strength range for the finished diameter.
Special spring temper	Agree a spring-wire specification such as ASTM A313/A313M, diameter-related tensile requirements and coil test requirements.
Custom forming temper	Request a tensile, bend or hardness target and confirm feasibility for the diameter.

The ASTM A580/A580M conditions listed here are product-condition classifications, not an assertion that every 304 wire temper is held in stock.

Key Mechanical Test Questions

Do you require soft forming behavior or higher cold-worked strength?
What is the final wire diameter and minimum bend radius?
Is a specific Rm range or elongation requirement needed?
Are material samples needed for trial forming, weaving or coiling?
Should testing and acceptance apply by coil, lot or heat?

Avoid incorrect comparisons: a tensile figure quoted for annealed 304 plate, 304 bar or hard spring wire is not automatically valid for all 304 stainless steel wire diameters and tempers.

SURFACE & TOLERANCE

Bright, Cold-Drawn and Annealed Wire Surface Options

Industrial wire surface and dimensional tolerances should match the buyer’s processing route.

Macro photograph of real fine 304 stainless steel wires with uniform smooth bright silver surface and clearly visible wire strands

SURFACE QUALITY

Surface Finish and Diameter Control

Fine wire surfaces affect downstream weaving, forming and appearance. Confirm processing lubricants, handling marks, scratches and tolerance before order confirmation.

Cold-drawn finish: may retain process lubricant unless cleaning is specified.
Special bright finish: agree cleaning and brightness expectations with the producing mill.
Annealed and pickled: may show a dull matte appearance.
Dimensional control: specify diameter tolerance, roundness and inspection method.
Cleanliness: confirm whether special residue limits are required for downstream applications.

DELIVERY CONDITIONS

304 Stainless Steel Wire Supply Forms

Choose the process condition before selecting the final coil or spool configuration.

Real stainless steel soft annealed fine wire wound in a plain compact coil on a workshop table

Annealed / Soft Wire

For bending and forming requirements, with a lower-strength condition agreed by order.

Uniform polished bright thin stainless steel wire wound neatly on an industrial metal wire spool

Bright Drawn Wire

Cold-drawn appearance and spool presentation, with lubrication and cleanliness defined in the purchase order.

Tightly wound hard drawn stainless steel wire coils in a steel wire processing factory without labels

Cold-Worked Wire

For applications that require a specified higher-strength wire condition and finished diameter.

These are condition and presentation examples. Coil, spool, reel, cleaning and winding options depend on finished diameter, order size and the actual producing plant.

GRADE COMPARISON

304 vs 316L Stainless Steel Wire

Compare chemistry and environment before choosing a wire grade; condition and finish still require separate specification.

304 Wire vs 316L Wire

On smaller screens, swipe the table horizontally to see all columns.

Item	304 stainless wire	316L stainless wire
UNS	S30400	S31603
Cr (%)	18.0–20.0	16.0–18.0
Ni (%)	8.0–10.5	10.0–14.0
Mo (%)	Not intentionally specified as a main alloy addition	2.0–3.0
Carbon max (%)	0.08	0.03
Procurement emphasis	General industrial corrosion resistance and formability	Added molybdenum and low carbon for applicable more demanding corrosion/welding conditions

Chemistry is grade-level reference only; finished-wire performance must be specified by standard, condition and diameter.

Which Grade Should You Quote?

For many general indoor and moderately corrosive industrial conditions, 304 is a practical first comparison. If the environment contains chlorides or requires an additional low-carbon control, 316L may be appropriate subject to engineering evaluation.

Select by exposure, cleaning chemistry and design life.
Specify soft or hard condition for either grade.
Compare unit pricing at the same gauge, surface, temper and packing terms.
Confirm fabrication trials for weaving, forming or spring applications.

Review 316L Stainless Steel Wire

INDUSTRIAL APPLICATIONS

Where 304 Stainless Steel Wire Is Used

Used by industrial converters and fabricated-wire manufacturers across multiple production workflows.

Authentic industrial fabrication image showing thin stainless steel wire mesh and wire forms on a factory workbench

APPLICATION 01

Wire Mesh & Screens

Weaving and screening feedstock where wire gauge and tensile condition meet the fabricator’s specification.

APPLICATION 02

Ties & Wire Forms

Bendable wire used for fastening, bundling, hooks and custom-formed industrial parts.

APPLICATION 03

Industrial Fabrication

Consistent round wire for welded or mechanically formed components where material and weld requirements are qualified.

APPLICATION 04

Wire Products & Cable Elements

Special wire processing applications requiring a clearly defined surface, gauge and final mechanical condition.

APPLICATION 05

Equipment Components

Wire-based clips, support parts and manufactured hardware for suitable service conditions.

APPLICATION 06

Spring-Wire Enquiries

Spring processing feedstock where a dedicated spring-wire grade/temper and ASTM A313 requirements are specified.

Applications describe potential material use only. Finished assemblies, mesh and springs may require their own product and inspection standards.

HOW IT IS MADE

304 Stainless Wire Drawing & Finishing Process

Understand the manufacturing controls that influence surface finish, wire gauge and final mechanical behavior.

Real stainless steel fine wire drawing machine in factory with thin metallic wire passing over guide rollers and take up spools

WIRE PRODUCTION

From Stainless Wire Rod to Finished Fine Wire

Stainless wire processing may include preliminary wire rod inspection, surface preparation, cold drawing, annealing or further drawing, dimensional testing and spooling.

Incoming grade and material identification.
Drawing reduction schedule based on diameter and target temper.
Annealing or further cold work where needed for the specified condition.
Surface finishing and dimensional verification.
Coil/spool winding, batch identification and inspection records.

The exact drawing schedule, heat treatment and line configuration vary by manufacturing mill and purchased grade.

WHY BAOSTEEL METAL

Manufacturing Scale and Reliable Procurement Planning

Clear specification control and practical industrial export coordination.

01 / CAPACITY

Established Steel Production

8 million MT actual annual output across the company’s steel product families, supporting industrial procurement coordination.

02 / INVENTORY

Consolidated Steel Inventory

1 million MT combined regular inventory across categories. Actual 304 wire gauge and temper availability is verified for each enquiry.

03 / QUALITY

Order-Specific Inspection

Specify heat analysis, diameter tolerance, surface acceptance, tensile test and documentation before confirmation.

04 / DELIVERY

Industrial Export Coordination

Clarify packing, spool dimensions, container plans, delivery port and material traceability for overseas shipments.

WEIGHT & QUANTITY TOOLS

304 Stainless Steel Wire Weight Calculator

Theoretical length-based weight and buyer-defined package mass are independent calculations.

01 / Wire Length-Based Weight Estimate

Calculate theoretical mass from a solid round Type 304 wire diameter and total length.

Wire diameter (mm)Total wire length (m)

Estimated total mass— MT

— g/mTheoretical running mass

— kgTotal mass

Formula: kg/m = π/4 × d² × 0.00793 (d in mm). Reference density 7,930 kg/m³. Net deliverable weight differs with actual tolerances.

02 / Spool or Coil Order Mass

Estimate purchase quantity from a buyer-entered unit net mass and the number of spools or coils.

Net unit mass (kg/spool or coil)Number of units

Estimated net order weight— MT

— kgNet kilograms

— unitsSpool or coil count

Spool/coil mass is only the customer’s input; it is not a claimed standard pack size or available-stock weight. Packing tare and shipping gross weight are separate.

Have a wire drawing or mesh production requirement?

Send the finished diameter, temper, surface and coil/spool limits together with total weight.

MANUFACTURING

304 Stainless Steel Wire Production & Finishing

Wire production requires gauge control and coordination between material condition and final application.

Industrial stainless steel wire drawing and annealing line with bright thin round stainless steel wire winding onto a steel bobbin

PROCESS CONTROL

Consistent Gauge, Finish and Material Identification

Production planning should connect alloy chemistry with the target finished diameter, condition and winding arrangement. Confirm the manufacturing route and acceptance tests for your chosen wire product.

Traceability of incoming 304 stainless material and heat analysis.
Cold drawing passes and dimensional checks as applicable.
Annealing and surface treatment to the agreed condition.
Inspection of scratches, winding damage and package identity.

SUPPLY & STOCK

Confirm Stainless Steel Wire Inventory by Specification

Actual supply is established by gauge, temper, net unit weight, surface and order date.

Availability Must Match Diameter and Temper

Company-wide stock figures cover many steel product categories; they do not establish immediate availability of every 304 wire diameter, spool format or temper.

Specify diameter and allowed deviation.
Provide temper / tensile target and preferred surface finish.
Indicate total quantity and target unit spool or coil mass.
State whether sample delivery, traceability or third-party testing is required.
Share destination and required shipment schedule.

Orderly industrial stainless steel wire spools and coils stored on pallet racks in a clean warehouse

Stock, minimum production quantity and lead time are confirmed for the actual specification and delivery window.

QUALITY & DOCUMENTATION

304 Stainless Wire Testing and Mill Certificates

Focus on final wire dimensions, mechanical condition, surface and the material’s heat/lot identity.

Quality Inspection Checklist

Heat or lot identification associated with the material certificate.
Chemical composition matching the required wire specification.
Diameter, ovality/roundness and tolerance as contracted.
Cold-drawn or annealed condition and required tensile test results.
Surface defects, wire winding, corrosion, cleanliness and damage checks.
Optional third-party witnessing or inspection documents where agreed.

Test certificates and third-party approvals must be confirmed for each actual producing mill and shipment. No universal certification for this product is implied.

Material Traceability

Request a packing and inspection record that connects each coil or spool to the supplied lot/heat and test documents.

Close view of quality technician measuring fine stainless steel wire diameter with a calibrated micrometer in an industrial laboratory

Need a special wire tensile or surface test?

Attach your drawing or acceptance specification and specify the report format before production.

OPTIONAL SERVICES

Stainless Wire Customization and Processing Coordination

Limit additional services to feasible, specification-defined operations rather than broad fabrication promises.

Cutting & Straightening

Feasibility-dependent straight lengths or cut pieces can be quoted separately, with the required tolerance and length.

Surface / Cleaning Options

Discuss lubricant removal, bright finish or other cleaning requirements when the downstream process requires them.

Coil / Spool Configuration

Agree winding direction, bore size, flange requirements and net unit mass before the production schedule is fixed.

All processing options depend on actual gauge, temper, capacity, quantity and producing-mill capability.

PACKING & EXPORT

304 Stainless Steel Wire Coils & Spool Packaging

Practical packing helps limit handling damage to thin-gauge finished wire.

Industrial stainless steel wire coils and metal spools wrapped for export on pallets with protective packaging and plain identification tags

EXPORT DELIVERY

Spool Protection, Labels and Shipment

Wire may be shipped on approved spools, reels or coils with packaging designed for the requested diameter, temper and destination. Confirm packing requirements during quotation.

Coil or spool dimension, winding and package weight limits.
Protective wrapping and handling compatible with surface finish.
Lot, gauge, grade and package number matched to the packing list.
Containerization, pallet loading and unloading method.
Shipment documents and approved inspection results per contract.

BULK PROCUREMENT

304 Stainless Steel Wire RFQ Checklist

Capture specification details that affect pricing, inspection and delivery.

Send These Wire Details

01 Grade / UNS / requested ASTM edition.
02 Wire diameter and required tolerance.
03 Annealed, cold-worked or specified tensile strength range.
04 Finish, cleanliness and end-use process.
05 Coil or spool bore/outer diameter and net unit mass.
06 Total kilograms/metric tons, MTC, port and desired delivery schedule.

Get a Comparable Factory Quotation

Send a single specification with the grade, finished dimension, required property and winding arrangement. The sales team can then check production feasibility and quotation terms without inventing an available gauge or stock quantity.

Your original drawings and technical documents can be attached through the global enquiry form when that option is enabled for the website.

Email: [email protected]

WhatsApp: +86 133 7050 3400

BUYER QUESTIONS

304 Stainless Steel Wire FAQs

Frequently requested wire-grade, condition, dimension and packaging information.

FREQUENTLY ASKED

304 Stainless Steel Wire FAQ

Technical answers for procurement teams selecting wire condition, dimension and coil packaging.

What is 304 stainless steel wire?

304 stainless steel wire is an austenitic chromium-nickel alloy product, often cold drawn and supplied in coils or on spools. Type 304 is UNS S30400, with reference chromium 18–20% and nickel 8–10.5%.

What is the applicable ASTM standard?

For general stainless wire, ASTM A580/A580M-23 is the core material standard and ASTM A555/A555M-23 provides general wire and wire rod requirements. Spring and weaving uses may need different product standards.

Is 304 stainless steel wire available in soft and hard conditions?

Annealed and cold-worked wire conditions are used for different fabrication needs. State whether soft forming performance or a higher tensile range is required and confirm the final diameter.

What is the carbon content of Type 304?

The reference Type 304 maximum is 0.08% carbon. The chosen ASTM edition and actual heat analysis govern compliance.

Can I use 304 wire for springs?

Some Type 304 wire is used in spring applications, but spring wire must be specified and evaluated under an applicable spring-wire standard such as ASTM A313/A313M and the required diameter-specific tensile condition.

What is the difference between 304 and 316L stainless wire?

316L has approximately 2–3% molybdenum and a lower carbon limit (0.03%), potentially improving resistance in selected chloride-bearing service. Grade suitability depends on the actual application.

Which wire diameters can you supply?

The page shows reference inquiry diameters from 0.20 to 6.00 mm. Quote feasibility and actual stock are checked for the requested gauge, temper, finish, quantity and packing.

Is bright wire the same as annealed wire?

No. Brightness is a surface/finish feature, while annealed or cold-worked is a metallurgical condition. Both must be specified separately.

How is stainless steel wire weight calculated?

For solid round Type 304 wire, theoretical kg per metre is approximately 0.006228 × d² with d in millimetres and reference density 7.93 g/cm³. Shipping weight is confirmed from actual packing and weighing.

Do you offer wire in coils and spools?

Coils, spools and reels can be discussed in an RFQ. The actual options and net pack mass depend on gauge, condition, total order and producing-mill capability.

Can you provide material test documents?

Specify the MTC format, chemistry and tensile measurements required. Availability of certificates and any third-party inspection is confirmed for the actual producing mill and shipment.

What should I include in a bulk 304 wire enquiry?

Provide diameter/tolerance, grade, standard, temper, finish, package size, total mass, inspection requirements and delivery destination.

BAOSTEEL METAL / WIRE PROCUREMENT

Request Your 304 Stainless Steel Wire Quote

Send the finished diameter, annealed or cold-worked condition, surface requirements, net spool/coil mass, total order weight and destination. Our team will confirm feasible supply and quotation terms.

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