Carbon Steel Round Bar

Carbon Steel Round Bar is a solid cylindrical steel product widely used in manufacturing and construction industries for its versatility and strength. It features excellent machinability, good weldability, and consistent mechanical properties across various diameters. Common materials include 1018, 1045, 4140, A36, and C45 carbon steel grades. This round bar functions as raw material for shafts, axles, gears, bolts, and structural components in machinery, automotive, and general fabrication applications.

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PRODUCT DETAILS

Carbon Steel Round Bar is a solid cylindrical steel product widely used in manufacturing and construction industries for its versatility and strength. This Carbon Steel Round Bar comes in various grades and sizes to meet diverse mechanical and structural requirements.

Product Parameters

Diameter range: 5mm to 600mm .

Regular sizes include 10mm, 12mm, 16mm, 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 80mm, 100mm, 120mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, and 500mm .

Length: 6 meters standard, with custom lengths from 3m to 12m available .

Processing techniques: Hot rolling, cold drawing, and hot forging .

Execution standards: ASTM A29, ASTM A108, EN 10083, JIS G4051, GB/T 699, and GB/T 700 .

Common grades: 1018, 1045, 4140, 4340, 1215, 12L14, Q235, Q345, S235JR, S275JR, S355JR, C45, and 40Cr .

Packaging: Seaworthy bundles with steel strips, waterproof wrapping, or wooden boxes for export .

Surface treatment: Black bare, bright finish, polished, peeled, ground, or oiled as requested .

Chemical Composition

Grade	C (%)	Mn (%)	Si (%)	P (%)	S (%)	Others
1018	0.15-0.20	0.60-0.90	0.15-0.30	≤0.04	≤0.05	–
1045	0.43-0.50	0.60-0.90	0.15-0.35	≤0.04	≤0.05	–
4140	0.38-0.45	0.75-1.00	0.15-0.35	≤0.035	≤0.04	Cr 0.80-1.10, Mo 0.15-0.25
Q235	0.14-0.22	0.30-0.65	≤0.30	≤0.045	≤0.045	–
C45	0.42-0.50	0.50-0.80	0.4	≤0.03	≤0.035	–

Physical Properties

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HB)
1018	440-500	370-415	15-18	126-143
1045	570-700	450-485	12-16	170-210
4140	655-1000	415-900	12-25	197-235
Q235	375-500	235	26	–
C45	570-700	450-490	14-17	170-210

Product Applications

Automotive parts including shafts, axles, and gears . Construction and structural supports . Machinery components and equipment manufacturing . Oil and gas industry for drilling equipment . Aerospace and defense applications . General fabrication and metalworking . Fasteners, bolts, and studs production . Agricultural implements and tools . This Carbon Steel Round Bar provides reliable performance across these diverse applications with consistent quality and mechanical properties.

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FAQ

1. How to get samples to check the quality? How long can I get the samples?
Answer:After confirming the price, we are happy to provide samples for your evaluation. After confirming the sample details, the samples will be ready for delivery within 3-7 days, and sent to you by courier, and arrive within 3-5 days.
2.Do you provide samples ? is it free or extra ?
Answer:We provide samples free of charge, but the customer is responsible for the courier freight.
3. Do you accept the third party inspection?
Answer: Yes absolutely we accept.
4.Can you accept customization?
Answer:Yes. If you have special requirements on products or packages, we can do customization for you.
5.How do you control the quality?
Answer:We have professional inspectors to analyze chemical composition of raw materials and test the finished products strictly according to standard stipulated in the contract. In this process, Internal and external surfaces, two ends appearance, bending degree, fixed length, outer diameter and wall thickness dimension etc will be checked one by one. You can be assured that all the products you get from us are reliable.