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

Nov 25, 2025

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Product Description


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

1.What is a steel round bar?

A steel round bar is a cylindrical metallic bar widely used in construction, industrial applications, and manufacturing. These round bars come in various sizes and materials tailored to different industries. The steel price varies based on material composition, size, and market demand.

 

2.What is a round bar called?

The most common shapes are round bar (also called rod), rectangular bar (including square bar, the special case of equal sides), and hexagonal bar (usually called hex bar for short). Tube and pipe are similar, but have hollow centers and are traditionally not called "bar" in industrial usage.

 

3.What is the difference between a round bar and a rebar?

The first key difference to note is within the strength of the two bars. The rebar has a much higher tensile and maximum bending strength. Such properties make it the perfect material for fortifying concrete. In doing just that, the rebar can withhold its molecular integrity for well over 100 years.

 

4.How strong is a round bar?

Strength and Durability: Round bars exhibit excellent tensile and compressive strength, making them suitable for high-stress applications. Rotational Applications: Their cylindrical shape allows them to excel in applications involving rotation, such as axles, shafts, and other machinery components.

 

5.What is 4140 round bar?

4140 is a widely used medium carbon steel. A general purpose alloy, offering the right combination of strength, toughness and hardness with good machinability. 4140 can be quenched and tempered to a broad range of strength levels.