AISI 4140 42CrMo Carbon Steel Bar High Strength Hot Rolled Rod Round Bar

Nov 17, 2025

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Product Name

Carbon Steel Pipe

Standard

GB/T 700-2006,GB/T 1591-94,JIS G3101-2004,
ASTM A36/A36M-05,ASTM A242/A242M-04,ASTM A529/A529M-05,
ASTM A572/A572M-06,EN 10025-2-2004

Outer Dia

8mm-610mm

Dia Tolerance

Control with in the standard, OD:+-1%, WT:+-10%

Materials

Q195,Q215 A,Q215 B,Q235 A,Q235 B,Q235 C,
Q235D,Q275,Q275B,Q275C,Q275D,Q295,Q345,Q390,Q420, Q460,
SS330,SS400,SS490,SS540,A36,1,GR.36,50(245),55(380),42(290),
60(415),65(450),S185(1.0035),S235JO(1.0114), S235JR(1.0038),
S235J2(0.0117),S275JR(1.0044),S275JO(1.10143),S355JO(1.0553),
E295(1.0050),E335(1.0060), S235J2W(1.861),S355J2W(1.8965),10#,
15#20#

Inspection

ISO,BV,SGS,MTC

Packing

Waterproof paper, and steel strip packed. Standard Export Seaworthy Package.Suit forall kinds of transport,or as required

Supply Ability

1000 metric tons/month

MOQ

5metric ton,sample order accepted

Shipment time

Within 7-10 workdays after receiving deposit or L/C

Commonly Used Steel Types

CategoryGradesSizesStandard
Carbon structure steelQ195,Q215,Q235,Q27516mm-250mmGB/T700-2006
Low alloy high strength structure steelQ295,Q345,Q390,Q420, Q46016mm-250mmGB/T1591-2008
Prime Carbon structure steel10#, 20#, 35#, 45#, 60#, 20Mn,65Mn,B2, B3,JM20, SH45,S45C,C4516mm-250mmGB/T699-1999
Alloy structure steel30Mn2,40Mn2,27SiMn, 42Crmo, 20Cc40Cr,20CrMo, 35CrMo,20CrMnTi, 30CrMnTi,20MnVB, 20MnTiBf 45MnV 20CrNiMo, Q345B, 35MnBM,40MnB,36Mn2V16mm-250mmGB/T3077-1999
Spring Steel65Mn,60Si2Mn, 50CrVA16mm-250mmGB/T1222-84
Bearing SteelGCr15tGCr15GD,55SiMoV16mm-250mmGB/T18254-2002
Structural steels subject to end-quench hardenability requirements20CrMnTi,30CrMnTi, 20Cr, 40Crf30CrMo,42CrMoA,27SiMn, 40Mn2H, 20CrNiMo, 40Mn2,q345b,35MnBM, 40MnB,45MnV.16mm-250mmGB/T5216-2004
Oil wells structural steel37Mn5,36Mn2V16mm-250mmQ/LYS248-2007
Marine anchor chain steelCM490,CM690,M30Mn216mm-250mmYB/T66-1987 GB/T18669-2002

If you have any other requirements or need to purchase other grades, please feel free to contact us!

Production Details

AISI 4140 42CrMo Carbon Steel Bar High Strength Hot Rolled Rod Round BarAISI 4140 42CrMo Carbon Steel Bar High Strength Hot Rolled Rod Round Bar

 

1.What is a carbon steel bar?

Carbon steel bars are elongated products made primarily of carbon and iron, featuring varying amounts of carbon content. They are distinguished from other steel bars by their increased tensile strength, durability, and malleability.

 

2.Is carbon steel real steel?

Absolutely. Carbon steel is as real as it gets. It's a substantial category within the steel family, defined primarily by its carbon content. This classification includes everything from the softest, most ductile grades to the hardest, most wear-resistant forms.

 

3.Is carbon steel stronger than steel?

Mild steel is better used for low-stress applications due to its ease of fabrication and low cost, while carbon steel (from medium carbon steel to ultra high carbon steel) is better used for high-strength applications due to its high carbon content and strength.

 

4.What is carbon steel used for?

High-carbon steel has many uses, such as milling machines, cutting tools (e.g. chisels) and high strength wires. These applications require a much finer microstructure, which improves toughness.

 

5.What are the disadvantages of carbon steel?

Carbon Steel Disadvantages
Because it's so strong, carbon steel is difficult to work with. It can't be easily bent and molded into different shapes, thus limiting its utility in certain applications. Carbon steel is also more susceptible to rust and corrosion than other types to steel.