S45C Round Bar Carbon Steel — Factory Direct Supplier | Huaxia-Steel
Huaxia-Steel supplies S45C round bar to manufacturers, distributors, and project owners worldwide. As a medium-carbon steel grade under JIS G 4051, S45C offers an excellent balance of strength, toughness, and machinability for shafts, gears, pins, bolts, and general machinery parts.
Product Overview
S45C is a Japanese standard carbon steel containing approximately 0.42–0.48% carbon. It is one of the most widely used medium-carbon grades in Asia and is frequently sourced from China for export to Southeast Asia, the Middle East, Africa, and Latin America.
Our S45C round bar is available in hot rolled, peeled, turned, ground, and cold-drawn conditions. We also provide cut-to-length, chamfering, and labeling services.
Specifications
| Parameter | Details |
|---|---|
| Standard | JIS G 4051, ASTM A29 1045, DIN EN 10083 C45 |
| Diameter range | 6 mm – 300 mm |
| Length | 3000 mm, 5800 mm, 6000 mm, or custom cut |
| Tolerance | h9, h10, h11, or as per JIS G 3191 |
| Straightness | ≤ 1 mm/m standard; tighter on request |
| Surface | Black, peeled, turned, polished, cold drawn |
Size and Weight Table (Hot Rolled Round Bar)
| Diameter (mm) | Weight per meter (kg) | Common length (mm) |
|---|---|---|
| 10 | 0.617 | 6000 |
| 16 | 1.578 | 6000 |
| 20 | 2.466 | 6000 |
| 25 | 3.853 | 6000 |
| 32 | 6.313 | 6000 |
| 40 | 9.865 | 6000 |
| 50 | 15.413 | 6000 |
| 60 | 22.195 | 5800 |
| 80 | 39.458 | 5800 |
| 100 | 61.654 | 5800 |
Available Steel Grades
In addition to S45C, we supply the following related grades for round bar:
- S20C, S35C, S50C, S55C (JIS G 4051)
- 1045, 4140, 4340 (ASTM A29)
- C45, C45E, C50 (DIN / ISO)
- Q235B, Q345B (GB/T)
Manufacturing Standards
Our S45C round bar production follows strict standards:
- JIS G 4051 — Carbon steels for machine structural use
- JIS G 3191 — Dimensions, mass and permissible variations for hot rolled steel bars
- ASTM A29/A29M — General requirements for carbon and alloy steel bars
Applications
- Shafts and axles
- Gears, sprockets, and pulleys
- Connecting rods and crankshafts
- Pins, studs, and bolts
- Machine structural parts
- Tool holders and fixtures
Quality Assurance
Every batch is supplied with a mill test certificate showing chemical composition, tensile test results, and heat number. Optional services include:
- Third-party inspection by SGS, Bureau Veritas, or TÜV
- Ultrasonic testing (UT) for bars above 50 mm diameter
- Spectral analysis verification
- Hardness testing after heat treatment
Packing and Shipping
Bars are bundled with steel straps, protected with waterproof paper or plastic film, and labeled with grade, heat number, size, and standard. We support FOB, CIF, and DAP delivery terms and can arrange container loading supervision.
Why Buy S45C Round Bar from Huaxia-Steel?
- Direct mill pricing with no middleman markup
- Wide inventory and fast delivery
- Custom cutting, chamfering, and marking
- Full traceability and export documentation
- Technical support for grade selection
Request a quotation today. Send us your required diameter, length, quantity, and destination port, and our sales team will respond within 24 hours.
