Audited Supplier
4140
Alloy Steel Bar
AISI, ASTM, GB, JIS, DIN, BS
Forged
Black or Rough Machined
Alloy
Sep1921- Class C/C, D/D
Forged Steel Bars
Scm440/4140/En19/42crmos4
1PC
Laiwu Xincheng
Standard Seaworthy
200-1000mm
China
72284000
Product Description
forged high strength 4140 alloy steel / AISI 4140 Chrome-Molybdenum High Tensile Forged Steel Round Bar
1.About 4140 Alloy Steel Bars:
.AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
5.Inspecting:
UT according toSEP1921 C/c, D/d, E/e, A388 or GB/T 6402,
Spectral Tested, Microstructure Tested,Hardness Test,Macrostructure Test,
6.Delivery Condition:
Forged+black surface
Forged+rough machined
Forged+rough turned+QT/annealed/normalized
Surface condition: Black; Peeled; Polished; Machined; Grinded; Turned; Milled
7.Manufacture:EAF+LF+VD(Annealed,normalized,Quenched+Tempered,peeled,rough turned).
8.Heat Treatment: Normalized / Annealed / Quenched / tempered (optional)
Main Grade we can supply for forged steel bars
1.About 4140 Alloy Steel Bars:
.AISI 4140 alloy steel is chromium, molybdenum, manganese containing low alloy steel. It has high fatigue strength, abrasion and impact resistance, toughness, and torsional strength.
2. AISI 4140 Steel Specification and Relevant Standards
| GB,YB | JIS | DIN(W-Nr.) | ASTM | BS | NF |
| 42CrMo | SCM440/(SCM4) | 42CrMo4-1.7225 | 4140 | 708M40/709M40/708A42 /EN19 | 42CD4 |
3. ASTM 4140 Steels And Equilvalents Chemical Composition
| Standard | Grade | C | Si | Mn | P | S | Cr | Mo |
| ASTM A29 | 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤ 0.035 | ≤ 0.04 | 0.8-1.1 | 0.15-0.25 |
| 42CrMo4 | 0.38-0.45 | ≤ 0.4 | 0.6-0.90 | ≤ 0.025 | ≤ 0.035 | 0.9-1.2 | 0.15-0.30 | |
| EN10083 | 1.7225 | |||||||
| JIS G4105 | SCM440 | 0.38-0.43 | 0.15-0.35 | 0.6-0.85 | ≤ 0.035 | ≤ 0.04 | 0.9-1.2 | 0.15-0.30 |
| GB 3077 | 42CrMo | 0.38-0.45 | 0.17-0.37 | 0.5-0.80 | ≤ 0.035 | ≤ 0.035 | 0.9-1.2 | 0.15-0.25 |
| BS 970 | EN19 | 0.35-0.45 | 0.15-0.35 | 0.5-0.80 | ≤ 0.035 | ≤ 0.035 | 0.9-1.5 | 0.2-0.40 |
4.AISI 4140 Forged Round Bar Mechanical Property :
(For refference only, property can be changed by adjusting quenching and tempereing tempreture)
| Grade | Tensile strength σb(MPa) | Yield strength σs (MPa) | Elongation δ5 (%) | Reduction ψ (%) | Impact Value Akv (J) | Hardness |
| 4140 | ≥1080 | ≥930 | ≥12 | ≥45 | ≥63 | 28-32HRC |
5.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 Ring | According to Customer's drawing |
5.Inspecting:
UT according toSEP1921 C/c, D/d, E/e, A388 or GB/T 6402,
Spectral Tested, Microstructure Tested,Hardness Test,Macrostructure Test,
6.Delivery Condition:
Forged+black surface
Forged+rough machined
Forged+rough turned+QT/annealed/normalized
Surface condition: Black; Peeled; Polished; Machined; Grinded; Turned; Milled
7.Manufacture:EAF+LF+VD(Annealed,normalized,Quenched+Tempered,peeled,rough turned).
8.Heat Treatment: Normalized / Annealed / Quenched / tempered (optional)
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 1.2714 H13 | |
| 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 |
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.
