AISI 4140 SCM440 DIN 42CrMo4 1.7225 Forged Alloy Steel Round Bar
Product Detail
AISI 4140 is defined as a low alloy steel which has 1% Cr-Mo as strengthening alloy elements.Compared with AISI 4130, it has a higher carbon content with good balance of strength, toughness ,abrasion and impact resistance and heat treatment capabilities,but poor in weld ability characteristics.AISI 4140 is generally supplied in quenched and tempered condition with hardness 28-32HRC.
4140 has high strength, harden ability, toughness, and deformation during quenching. It has high creep strength and endurance strength at high temperatures. Used for manufacturing forgings that require higher strength and larger quenched and tempered sections than 4135 steel, such as large gears for locomotive traction, booster transmission gears, rear axles, connecting rods and spring clips that are heavily loaded.
Specification
| Product Name | AISI 4140 SCM440 DIN 42CrMo4 1.7225 Forged Alloy Steel Round Bar | |
| Material | ASTM | 4140 |
| DIN | 42crmo4 | |
| GB | 42CrMo | |
| Standard | GB/T799, ASTM A29, A108, A321, A575, BS970, DIN1652, JIS G4051 | |
| OD | 6mm to 600mm | |
| Surface | Black painted, Bare, Polished, Chrome Plated | |
| Specifications | Round bar | 8mm~800mm |
| Angle bar | 3mm*20mm*20mm~12mm*800mm*800mm | |
| Square bar | 4mm*4mm~100mm*100mm | |
| Flat bar | 2*10mm~100*500mm | |
| Hexagonal | 4mm~800mm | |
| Condition | Forged; Hot rolled; Cold drawn | |
| Process | Electric furnace melted， forged and annealed, round bar turned. | |
| Hardness: | HBS 217Max (Different from heat treatment)QT 28-32HRC | |
| UT Test | SEP 1921/84/2 C/c class. | |
| Tolerance | Dia -0/+ 0~5mm, Thickness -0/+ 0~5mm, Width: -0/+ 0~10mm. | |
| Length | 2m,4m,5.8m,6m,11.8m,12m or as required. | |
| Package | Seaworthy Packing. | |
AISI 4140 equal Grade
|
Country |
China |
Japan |
Germany |
USA |
British |
|
Standard |
GB/T 3077 |
JIS G4105 |
DIN (W-Nr.) EN 10250 |
AISI/ASTM ASTM A29 |
BS 970 |
|
Grade |
42CrMo |
SCM440 |
42crmo4/1.7225 |
4140 |
EN19/709M40 |
AISI 4140 steel chemical composition（%）
|
Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
|
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 |
|
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 |
|
42crmo4/1.7225 |
0.38-0.45 |
≤ 0.4 |
0.6-0.9 |
≤0.025 |
≤0.035 |
0.9-1.2 |
0.15-0.30 |
|
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 |
|
EN19/709M40 |
0.35-0.45 |
0.15-0.35 |
0.5-0.80 |
≤0.035 |
≤0.035 |
0.9-1.5 |
0.2-0.40 |
AISI 4140 steel mechanical properties
|
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 |
Application
AISI 4140 steel finds many applications as forgings for the aerospace,oil and gas,automotive, agricultural and defense industries etc.Typical applications for 4140 steel uses include:forged gears,spindles,fixtures,jigs,collars,Axles,conveyor parts,crow bars,logging parts,shafts,sprockets,studs,pinions,pump shafts, rams, and ring gears etc.
Quality assurance
1. Strict according to Requirements
2. Sample: Sample is available.
3. Tests: Salt spray test/Tensile test / Eddy current / Chemical composition test according to customers' request
4.Certificate: IATF16949, ISO9001, SGS etc.
5. EN 10204 3.1 Certification
