Global Steel Supply & Processing
C45 / 1.0503 · EN ISO 683-1:2018 · Hot-Rolled & Finished Bars
Source C45 steel bars by diameter, length and delivery condition. Send your quantities, required heat treatment, inspection documents and destination port for an order-specific factory quotation.
Review C45 specifications ↓
Specify the bar grade, diameter, surface finish and mechanical condition with your RFQ.
| European grade | C45 / Steel No. 1.0503 |
| Grade standard | EN ISO 683-1:2018 — steels for quenching and tempering |
| Bright bar delivery | EN ISO 683-7:2024, where specified |
| Historical reference | EN 10083-2:2006, for older purchase documentation |
| Steel category | Medium-carbon, unalloyed engineering steel |
| Product form | Round steel bar; square and hexagonal sections on enquiry |
| Surface options | Hot-rolled, peeled/turned, ground or drawn as agreed |
| Heat-treatment condition | As-rolled (+AR / +U), normalised (+N), or quenched and tempered (+QT) as ordered |
| Diameter and length | Supply sizes and cut lengths confirmed by your order list |
| Dimensional tolerance | Applicable bar tolerance class and straightness specified at quotation |
| Inspection documents | Heat analysis, test results, identification and MTC according to PO |
| Order information | Grade, Ø / section, length, tonnage, condition, destination port |
Specify the surface and supply condition that fits the next step in your machining or heat-treatment schedule.
Natural hot-rolled mill-scale finish for further machining or heat treatment.
Bright round bar surface with your chosen diameter tolerance and finish.
Clear round end faces and controlled cut lengths for your production schedule.
Use the C45 / 1.0503 heat-analysis requirements and request certificate results for your supplied bar batch.
| Element | Grade Limit |
|---|---|
| Carbon (C) | 0.42–0.50% |
| Manganese (Mn) | 0.50–0.80% |
| Silicon (Si) | 0.10–0.40% |
| Phosphorus (P) | ≤ 0.045% |
| Sulfur (S) | ≤ 0.045% |
| Chromium (Cr) | ≤ 0.40% |
| Nickel (Ni) | ≤ 0.40% |
| Molybdenum (Mo) | ≤ 0.10% |
Reference composition based on EN ISO 683-1:2018 and mill-grade technical data. The purchased standard edition and certified heat analysis govern material acceptance.
Your purchasing specification determines the grade variant and relevant impurity limits.
Quenched-and-tempered properties depend on the ruling bar section. Include the requested condition and inspection tests in your order.
| Round diameter | Min. proof stress | Tensile strength | Min. elongation A5 |
|---|---|---|---|
| ≤ 16 mm | 490 MPa | 700–850 MPa | 14% |
| > 16–40 mm | 430 MPa | 650–800 MPa | 16% |
| > 40–100 mm | 370 MPa | 630–780 MPa | 17% |
Reference diameter-specific +QT properties from a steel producer’s C45 grade sheet. Verify your agreed standard, bar section, heat treatment and MTC before acceptance.
These are related medium-carbon purchasing specifications. Grade chemistry, delivery state and product standard are selected to match your drawing.
Specified through EN ISO 683-1 for heat-treatable steels. Bar chemistry includes 0.42–0.50% carbon and 0.50–0.80% manganese.
Specified using SAE J403 chemistry and applicable ASTM bar-product requirements. The standard chemistry includes 0.43–0.50% carbon and 0.60–0.90% manganese.
Review each grade against your full purchase specification and drawing requirements.
View SAE 1045 Bar ↗Purchasing teams can assess manufacturing scale, inventory coordination, material testing and export arrangements in one enquiry.
Actual annual steel production across our product range supports volume planning for regular and project-based orders.
Manufacturing ↗Our regular company-wide steel inventory supports order planning. C45 size and condition availability are confirmed for each request.
Steel Inventory ↗Specify chemical analysis, mechanical testing, hardness, diameter tolerance and heat-number traceability for your order.
Quality Control ↗Share your bar sizes, bundle dimensions, total tonnage, destination port and trade terms for a relevant quotation.
Contact Sales ↗Select the diameter, heat-treatment condition and inspection scope required for your component drawings.
Bar stock for machined shafts and power-transmission components.
Machined round sections for shafting and bearing support parts.
C45 stock for gear blanks, hubs, collars and similar parts.
Pins, levers and rods specified for mechanical assemblies.
Parts requiring a surface-hardening treatment planned by your manufacturer.
Bars used for machined couplings and connecting components.
Estimate the theoretical mass of solid round bars before requesting a price by diameter, length and quantity.
Calculated from a solid round section at nominal steel density of 7,850 kg/m³. Actual commercial and shipment weights follow the agreed purchase terms.
Send the information below for grade and condition-based pricing.
BAOSTEEL METAL coordinates steel procurement through operations with 8 million metric tons of actual annual steel production across product categories. Send your C45 grade and finish requirements to discuss a suitable supply plan.
Share diameter, bar length, supply state and tonnage for a current stock or production check. Our company maintains 1 million metric tons of regular steel inventory across its product portfolio.
Specify the material grade, heat-number identification, surface condition, dimensional tolerance and the required mechanical or hardness tests. Our sales team can confirm the documentation package with the quotation.
Share your cut list or component drawings with the bar enquiry. We can check cutting, surface preparation and end-machining options based on your diameter and required tolerances.
Provide bar diameter, length, bundle weight and unloading requirements. Confirmed orders can include suitable securing, corrosion-protection requests, identification and shipping arrangements.
Compare grade chemistry, product form and delivery condition before selecting the bar for your project.
C45 / 1.0503 is specified under EN ISO 683-1:2018. Bright bar products can be ordered according to EN ISO 683-7:2024. Include your specified standard edition on the RFQ.
State the required as-rolled, normalized, quenched-and-tempered or bright finish condition with the diameter and test requirements. Our team will confirm supply options.
Both are medium-carbon grades under different chemistry standards. Compare the specified composition, product standard and heat-treated condition with your approved component drawing.
Send the bar diameter, length, quantity, delivery condition, inspection documents, destination port and any machining drawings.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.
