2mm/3mm/5mm/10mm Zhongding Low Structural China Carbon Steel Round Bar ASTM

• After-sales Service: Cutting, Bending, Polishing
• Warranty: /
• Type: Carbon Steel Bar
• Model NO.: A36 Carbon Steel Round Bar
• Standard: AISI, ASTM, GB, JIS
• Technique: Hot Rolled
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Coated
• Alloy: Non-alloy
• Special Use: Free Cutting Steel, /
• Lengths: 10 FT (3.05 M), 20 FT (6.1 M)
• Material Type: Low Carbon Steel (Mild Steel)
• Yield Strength: ≥250 MPa (36,000 Psi)
• Tensile Strength: 400-550 MPa (58,000-80,000 Psi)
• Elongation: ≥20% (in 200mm Gauge Length)
• Hardness: 119-159 Hb (Brinell)
• Density: 7.85 G/Cm³ (0.284 Lb/in³)
• Diameter: 6-150mm
• Transport Package: Standard Packing
• Specification: Low carbon structural steel
• Trademark: Zhongding
• Origin: China
• Production Capacity: 9500 Ton/Tons Per Week

Product Description

Product Description

Carbon Steel Round Bar is a circular cross-section bar made of carbon steel, widely used in mechanical processing, construction, automotive manufacturing, hardware tools and other fields. Its performance is mainly determined by the carbon content (low carbon steel, medium carbon steel, high carbon steel), with high strength, processability, and cost-effectiveness. A36 is the most commonly used low-carbon structural steel in the American standard (ASTM A36), widely used in construction, bridges, machinery manufacturing, and general structural components

Parameter	Value
Material Type	Low Carbon Steel (Mild Steel)
Standard	ASTM A36
Yield Strength	≥250 MPa (36,000 psi)
Tensile Strength	400-550 MPa (58,000-80,000 psi)
Elongation	≥20% (in 200mm gauge length)
Hardness	119-159 HB (Brinell)
Density	7.85 g/cm³ (0.284 lb/in³)

Diameter Range

Imperial (inches)	Metric (mm)	Common Applications
1/4" - 3/4"	6 - 20	Bolts, pins, small shafts
3/4" - 2"	20 - 50	Structural supports, axles
2" - 6"	50 - 150	Heavy machinery, rollers
>6"	>150	Custom industrial parts

Lengths

Standard: 10 ft (3.05 m), 20 ft (6.1 m)

Custom: Cut-to-length (e.g., 12 ft, 6.5 m)

Tolerances (Hot Rolled)

Diameter (mm/inches)	Tolerance (±)
6-20 mm (1/4"-3/4")	0.3-0.5 mm
20-50 mm (3/4"-2")	0.5-0.8 mm
50-150 mm (2"-6")	0.8-1.5 mm

Mechanical Comparison vs. Other Grades

Grade	Carbon %	Tensile Strength	Primary Use
A36	≤0.26	400-550 MPa	Structural welding
1018	0.15-0.20	440 MPa	Machined shafts
1045	0.43-0.50	585 MPa	High-strength components

Detailed Photos

 

Company Profile

Packaging & Shipping

FAQ

1. Who are we?

We are based in Zhejiang, China, start from 2020,sell to North America(20.00%),South America(10.00%),Oceania(10.00%),Africa(10.00%),Eastern Europe(10.00%),Mid East(10.00%),Southeast Asia(10.00%),Western Europe(5.00%),Southern Europe(5.00%),Northern Europe(5.00%),Domestic Market(5.00%). There are total about 11-50 people in our office.

 

2. How can we guarantee quality?

Always a pre-production sample before mass production;

Always final Inspection before shipment;

 

3.What can you buy from us?

Steel Plate, Rail Steel, Steel Rebar, Steel Pipe, Profile Steel

 

4. Why should you buy from us not from other suppliers?

Zhejiang Zhongding Steel Co., Ltd.is a professional one-stop steel products supplier, we always keep the service philosophy " Think What Customer Cares, Do What Client Wants", provide products and service with high performance and good price.Our company's

 

5. What services can we provide?

Accepted Delivery Terms: FOB,CFR,FAS,FCA,DES;

Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF;

Accepted Payment Type: T/T,L/C,D/P D/A;

Language Spoken:English,Chinese,Spanish,Japanese,Portuguese,German,Arabic,French,Russian,Korean,Hindi,Italian