Premium Carbon Steel Round Bar Supplier | ASTM A36, S235JR, 1045 | HR & Cold Drawn Sizes For Sale
Diameter： 4mm-800mm or as customized
Length： 0-12m or as customized
Surface：Bare, Black Painted, Varnish Coating, galvanized etc.
Standard：ASTM，AISI，JIS,GB， DIN,EN
Products can be customized
Email: [email protected]
WhatsApp/WeChat/Mobile：+86-18753135285
Carbon steel round bar performance parameters
| Product Name | carbon steel round bar |
|---|---|
| Material | Q195,Q215 A,Q215 B,Q235 A,Q235 B,0235 CQ235D,Q275,Q275B,Q275C,Q275D,Q295,Q345,Q390Q420,Q460SS3 55(380).42(290).60(415),65(450)S185(1.0035),S235JO(1.0114),S235JR(O(1.10143),S355J0(1.0553)E295(1.0050)E335(1.0060),S235J2W(1.861) |
| Model | Diameter: 4mm-800mm or as customized Length: 0-12m or as customized |
| Standard | GB/T 700-2006,GB/T 1591-94,JIS G3101-2004.ASTM A36/A36M-05ASTM A242/A242M-04ASTM A529/A529M-05ASTM A572/A572M-06EN 10025-2-2004 |
| Place of Origin | Shandong, China |
| Delivery time | 7-15 days |
| Surface finishing | Bare, Black Painted, Varnish Coating, galvanized etc. |
| Certificate | ISO 9001,ISO14001,ISO45001,ISO50001,CE,LR,ICC,SGS.BV etc |
| Supply capacity | 2500 ton/monthly |
| MOQ | 1 ton |
| Trade Terms | FOB, CIF, CFR, EXW, FCA, FAS, etc. |
| Payment | TT, LC, We can negotiate |
| Tests | squash test, extension test, hydrostatic test, crystal decay test, heat resistance |
| Application |
1. Mainly used in the manufacture of petroleum, chemical, gas separation and shipping container or other similar devices, such as all kinds of tower vessels, heat exchangers,torage tank and tank car, etc. 2. Manufacture all kinds of stamping parts, construction and engineering structure and some of the less important machine structure and parts. |
| Advantages |
1. Quick Respond 2. Reasonable Price 3. Abundant stock and prompt delivery 4. Flexible payment terms 5. Rich experiences in manufacturing and exporting 6. Excellent Quality |
Advantages of Our Carbon steel round bar
Superior Mechanical Strength and Structural Reliability
Our carbon steel round bars are produced from premium billets, offering exceptional yield and tensile strength. Whether it’s the toughness of low carbon steel or the hardness of medium carbon steel (e.g., 1045/S45C), they maintain excellent structural stability under complex loads. This makes them the ideal material for manufacturing drive shafts, heavy-duty bolts, and critical supports, ensuring long-term equipment performance.
Precise Dimensional Tolerances and Excellent Straightness
Through advanced cold drawing or precision grinding processes, our round bars feature high dimensional accuracy (tolerances up to h9-h11) and perfect straightness. This high-precision specification ensures smooth feeding in automatic lathes and reduces subsequent machining allowance, making it the top choice for precision pins, fasteners, and hydraulic components.
Excellent Machinability and Cost-Effectiveness
Our carbon steel round bars offer outstanding machinability and weldability, effectively reducing tool wear and boosting production efficiency. As a highly cost-effective raw material, it delivers reliable mechanical performance at a much lower price point than alloy steels, helping customers achieve significant cost optimization in mass production projects for automotive, machinery, and construction sectors.
Packaging style of Carbon steel round bar
FAQs
Should I choose hot rolled or cold drawn round bars for my project?
For large-scale, low-cost structural applications, hot rolled bars are more economical. However, if you require direct processing on automatic lathes or have strict requirements for dimensional tolerances (such as h9 grade) and surface finish, cold drawn bars are the better choice as they significantly reduce subsequent machining time.
How does the hardness of your 1045/S45C round bars perform after quenching and tempering?
Our 1045 medium carbon round bars offer excellent heat treatment response. Through proper quenching and tempering, hardness can uniformly reach HRC 20-30 (or adjusted per requirements). We ensure a uniform microstructure to avoid inconsistent core hardness or cracking during treatment.
How do you guarantee the straightness of long round bars? Will it affect my bar feeder operation?
Our cold drawn bars undergo precision straightening, with straightness controlled within 1.0mm/m. This ensures minimal vibration during high-speed rotation, effectively protecting your bar feeder and spindle while improving the coaxial precision of the parts.
How is the weldability of low carbon round bars (such as A36/1018)?
These low carbon grades offer excellent weldability and can be welded using standard methods without preheating. Additionally, their machinability is very stable, yielding a smooth surface finish. For higher production speeds, we also offer free-cutting grades like 1215.
How are round bars protected from corrosion during sea freight? How do we distinguish different grades?
For cold drawn/bright bars, we apply anti-rust oiling and wrap them in VCI paper. For easier warehouse management, we typically use color coding on the bar ends, with different colors representing different grades (e.g., Blue for 1020, Red for 1045), ensuring correct material selection.
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