C40 Structural Steel Rod Bar

Product Type - Steel Rod

Steel C40 is a common medium carbon and medium tensile steel, with improved strength over mild steel, through-hardening medium carbon steel. C40 Carbon Steel Round Bar is also readily machinable in any condition. C40 steels are generally used in the as-supplied untreated condition. Carbon steel bars are available in round, square, flat, and hexagon bars in hot-rolled or cold-drawn conditions. While hot-rolled and cold-drawn bars have the same general shape, they are very different in their dimensional characteristics.


Availability : IN STOCK


  • High Precision Dimension: The carbon steel plate has excellent processing technology good molding and easy welding. Thickened material, stable performance, and high hardness, not easy to rust.
  • Low Friction: Low dissipation factor. More durable than most ordinary domestic bearings. Lower operating costs​
  • Life Is Long: High-quality steel through strict quality inspection, quality control layer-by-layer detection, and reliable quality, long service life.
  • Customization: Drawings and samples can be processed and customized. Conventional large-scale spot, non-standard customization.
Product Name C40 Structural Steel Rod Bar
Size Round Steel Bar

Outside Dia(mm): 8mm-650mm As Customers’ Requirement

Square Bar

Outside Dia(mm):5.5-250MM

Hexagon Bars

Diameter supplied:2mm-80mm As Customers’ Requirement

Tolerance 5‰
Length 1-9m or As Customers’ Requirement
Surface Finish All Sizes Can be customzied
Certifications ISO 9001 BV SGS
Packing Industry standard packaging or according to client’s requirement
Payment terms T/T or LC at sight
Trade Terms EXW, FOB, CIF, CFR
Delivery time Fast delievery in 7 days, up to order quantity
Quality Mill Test Certificate supplied with the shipment, third part inspection is acceptable
Packing Detail Standard export package:Wooden pallet +paperboard +steel strip Customized requirements are accepted
Cutting Type All Sizes Can be customzied
MOQ 1 Ton
Capacity 10, 000 ton per month

C40 Grade Worldwide Equivalents

China | GB 3077 40
USA | ASTM A29 1040
Japan | JIS G4051 S40C
UK |BS970 080M40
France | NFA 33-101 AF60-C40

Steel AISI C40 Chemical Composition(%)

Standard Grade C Si Mn P S
DIN 17200 CK40/1.1186 0.37-0.44 ≤0.4 0.50-0.80 ≤0.035 ≤0.03

Mechanical properties of C40

Tensile Strength Yield Strength Elongation Reduction of Area Impact Charpy-V
Mpa Mpa % % J
≥570 ≥335 ≥19 ≥45 ≥47

Processing Flow

Our Certifications

Packaging and Shipping

1. Wood pallet packing cover with water-proof paper

2. Steel pallet packing cover with water-proof paper

3. Wood box packing

4. Steel pallet packing cover with steel box

5. In bundles with steel strip no extra packing

All Grades We are Supplying

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