4130 forged bar China / 4130 Forged Steel properties / AISI 4130 Forged Round
AISI 4130 alloy steel is a medium carbon, low alloy steel in ASTM A29 standard. ASTM 4140 steel is also commonly referred to as a chromoly steel, or chrome moly steel, containing nominally 0.28-0.33% Carbon, 0.8-1.1% Chromium and 0.15-0.25% Molybdenum. It is similar to 4140 steel which has a higher carbon level (0.28-0.33%), giving 4130 material improved weldability, at the expense of through thickness strength. With the proper heat treatment it is also readily machined. Annealing ASTM 4130 alloy steel offers excellent ductility. AISI 4130 steel is usually supplied as round bar commonly in the hardened and tempered condition
1.4130 Steel equivalent
| Country |
British |
USA |
Japan |
BS |
| Standard |
BS 970 |
ASTM A29 |
JIS G4105 |
EN10083 |
| Grade |
708A25/708M25 |
4130 |
SCM430 |
25CrMo4/1.7218 |
2.4130 steel chemical composition
| Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
| 4130 |
0.28-0.33 |
0.15-0.35 |
0.4-0.6 |
0.035 |
0.04 |
0.8-1.1 |
0.15-0.25 |
/ |
| 25CrMo4 |
0.22-0.29 |
0.4 |
0.6-0.9 |
0.025 |
0.035 |
0.9-1.2 |
0.15-0.30 |
/ |
| SCM430 |
0.28-0.33 |
0.15-0.35 |
0.6-0.85 |
0.03 |
0.03 |
0.9-1.2 |
0.15-0.30 |
/ |
3.Forged Steel Size we can supply:
Forged Steel Round Bar: Φ85mm~1200mm
Forged Square steel Bar: 150×150-800×800mm
Forged Flat Blocks: (150mm-800mm)*(200mm-800mm)
Forged Shaft and Forged Ringd: According to Customer's drawing
4.Inspecting: UTS according toSEP1921 C/c, D/d, E/e, A388 or GB/T 6402, Spectral Tested, Microstructure Tested,Hardness Test,Macrostructure Test,
5.Grain size: 6-8
6.Processing:EAF+LF+VD(Annealed,normalized,Quenched+Tempered,peeled,rough turned).
7.Heat Treatment: Normalized / Annealed / Quenched / tempered (optional)
8.Delivery Condition:
Forged+black surface
Forged+rough machined
Forged+rough turned+QT/annealed/normalized
9.About our factory:
Our main products include Forged Steel Round Bar from Sizes 85mm to 1100mm, Forged Steel Square Bar from Sizes 150×150 to 800×800mm with various grade ;The largest production steel ingot 15T, mainly forged alloy steel, carbon steel and other materials. The annual output of forged round can reach 60,000 tons. The products are widely used and can be supplied to users in metallurgy, chemical, hydraulic, port and marine machinery The main equipment includes a 2000-ton hydraulic press, a 3-ton electro-hydraulic hammer, a 2.5-meter ring rolling machine, and is equipped with large and small traveling machines, metalworking lathes, and multiple large and small sawing machines. The company now has more than 100 sets of production equipment from a whole set of processes from blanking, heating, forging to heat treatment and machining
10.Main Grade we can supply for forged steel bars
| Steel series |
Representative steel type |
| Carbon Steel series |
AISI 1020,1045,A36,S355JR,S355JO |
| Petroleum machinery series |
AISI4150,AISI4140,AISI4130, |
| 30CrMo,4145H |
| Tool mold series |
1.2714,5CrMnMo,5CrNiMoV, |
| 1.2738,1.2311,1.2312 |
| Bearing series |
52100,GCr15,SUJ2 |
| Marine series |
4140,42CrMo,SCM440, |
| 709M40 |
| Car series |
SAE8620,20CrNiMo, |
| SNCM220 |
| Heavy-duty transmission series |
40CrNiMo,SNCM439, |
| SAE4340,EN24 |
| Mining machinery series |
655M13,826M40, |
| 25CrMo |
| Wind power gear series |
18CrNiMo7-6, 17CrNiMo6, 1.6582,1.6587,SAE8620 |
| Wind power spindle series |
34CrNiMo6,817M40 |
| Nitriding series |
20MnCr5,38CrMoAl, |
| 31CrMoV9 |
| Pressure vessel series |
15CrMo,13CrMo4-4 |
| Metallurgical roll series |
21CrMoV511,W1.7225, |
| EN19,709M40 |
Audited Supplier 
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