Product Parameters
(1). 4140 Steel Equivalent Grades :
| GB | DIN | ASTM | JIS | BS | NF |
| 42CrMo | 1.7225 | 4140 | SCM440 | 708M40 | 42CD4 |
(2). 4140 Steel Composition:
| Grade | C | Si | Mn | Cr | Mo | P | S |
| 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | 0.80-1.10 | 0.15-0.25 | <0.035 | <0.04 |
| 42CrMo | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | 0.15-0.25 | <0.035 | <0.035 |
| 1.7225 | 0.38-0.45 | 0.10-0.35 | 0.60-0.90 | 0.90-1.20 | 0.15-0.30 | <0.025 | <0.025 |
| SCM440 | 0.38-0.43 | 0.15-0.35 | 0.60-0.90 | 0.90-1.20 | 0.15-0.30 | <0.030 | <0.030 |
| 708M40 | 0.36-0.44 | 0.10-0.40 | 0.50-0.90 | 0.90-1.20 | 0.15-0.30 | <0.035 | <0.035 |
| 42CD4 | 0.38-0.46 | 0.10-0.40 | 0.60-0.90 | 0.85-1.20 | 0.15-0.30 | <0.035 | <0.035 |
(3).Special Steel Round Bar
| Grade | Spec | Dimension | Steel Grade | Application industry | |
| Special Steel Round Bar | Quality carbon structural steel | GB/T699 JIS G 4051 ASTM A29 SAE,EN10083 (Others) | 12-260 | 10# ,20#,45#, 65Mn,SAE1080,S45C,etc | For Manufacturing of All Kinds of Bearing Parts, Connecting Rod. Rigging Metal Tools etc. |
| Low alloy high-strength steel | GB/T1591,(Others) | 13-260 | Q355 series,Q460C,etc | Mechanical,Car,Engineering machinery | |
| Alloy structural steel | GB/T3077,JIS,ASTM A29, EN10083,(Others) | 13-260 | 20Mn2-45Mn2,25MnV,27SiMn-42SiMn,20Cr-40Cr,12CrMo-42CrMo,20CrMn,40CrMn,SCr420,SCr440,SCM420,SCM440,41Cr4,20CrMoA,30CrMoA,20Cr2MoA,20CrNiMo,20Cr2Ni4A,SAE4340,20Cr2Ni4A,30CrMnSiA etc | Mechanical,Car,Bridge,Petrochemical industry | |
| Bearing steel | GB/T18254,(Others) | 14-200/5-25 wire rod and cold drawn wire | GCr15,GCr15SiMn,C&U1,C&U2,GCr15-JN,SCP52100,SCPSS52100,GCr15S700,100CrMn6,SUJ2,SUJ2S1,SAE1055,S55C,G20CrNiMoA(SAE8620),GCr15etc | Mechanical ,Car ,Electric machinery,Engineering machinery etc | |
| Spring Steel | GB/T1222,JIS,SAE,EN,(Others) | 13-120 | 60Si2MnA,60Si2CrA,60Si2CrVA,55CrMnA,50CrVA,SUP9, SUP9A ,SUP11A, 55Cr3 ,51CrV4 ,52CrMoV4 ,SAE5160 SAE6150 ,SAE9254, 60SiCrVAT, 52CrMoV4 ,55SiCr etc | Car,High Speed railway,Locomotive | |
| Round billet | 300mm-600mm ( According to the different requirement) | ||||
| Large section bar | 80mm-350mm ( According to the different requirement) | ||||
| Forging | 180mm-1500mm ( According to the different requirement) |
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1.Is alloy steel good quality?
Yes! Alloy steel shows extraordinary quality which makes it highly useful across different applications.
2.What are the two types of alloy steel?
These added elements improve its strength, durability, and resistance to corrosion. It comes in two types: low alloy steel (up to 8% added elements) and high alloy steel (more than 8%).
3.What type of steel is a round bar?
Steel round bars are cylindrical metal bars used in construction, manufacturing, and industrial applications. They come in different sizes and materials, including mild steel, stainless steel, tool steel, and alloy steel, catering to industries such as automotive, aerospace, and infrastructure.
4.Is alloy steel the same as forged steel?
Alloy steel is the most commonly used metal for forging. This is because forged alloy steel is known for being stronger, more wear resistant and tougher compared to carbon steel forgings.
5.Does alloy steel rust easily?
Yes, but only if that alloy is made with ferrous metals. It is important to understand what an alloy is; simply a combination of two or more metals. The presence of iron is the determining factor in whether or not a metal will rust, regardless if it is an alloy or not.