AISI 4140 Alloy Steel Plate 42CrMo4 - 655 MPa Tensile Strength, 28-34 HRC Hardness for Industrial Applications
Price:
1.25 USD/KG
MOQ:
500KGS
Delivery Time:
14 Days
Brand:
Shagang
Product Description
Product Overview
AISI 4140 alloy steel is a chromium, molybdenum, and manganese containing low alloy steel known for its exceptional mechanical properties. This high-strength material offers superior fatigue strength, abrasion resistance, impact resistance, toughness, and torsional strength, making it ideal for demanding industrial applications.
Available Forms & Sizes
We supply AISI 4140 alloy steel in multiple forms with extensive size ranges:
- Round Bar: Ø5mm-200mm (hot rolled), Ø140mm-3000mm (forged)
- Steel Plate: 10mm-200mm thickness × 100-2300mm width (hot rolled)
- Forged Plate: 150-1500mm thickness × 100-3000mm width
- Additional forms include flat bar, square bar, hexagonal bar, and pipe/tube
International Equivalents
This alloy steel meets multiple international standards:
- Japan (JIS): SCM440
- Germany (DIN): 1.7225 / 42CrMo4
- China (GB): 42CrMo
- British (BS): 708M40
Chemical Composition
Standard chemical composition ranges across major specifications:
| Standard | C | Si | Mn | Cr | Mo | P | S |
|---|---|---|---|---|---|---|---|
| ASTM A29/29M 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | 0.80-1.10 | 0.15-0.25 | ≤0.035 | ≤0.040 |
| DIN 1.7225 | 0.38-0.45 | ≤0.40 | 0.60-0.90 | 0.90-1.20 | 0.15-0.30 | ≤0.035 | ≤0.035 |
| GB/T 42CrMo | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | 0.15-0.25 | ≤0.030 | ≤0.030 |
Mechanical Properties
Key mechanical properties in quenched and tempered condition:
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 655 MPa | 95,000 psi |
| Yield Strength | 415 MPa | 60,200 psi |
| Elongation at Break | 25.70% | 25.70% |
| Hardness (Brinell) | 197 HB | 197 HB |
| Machinability | 65% | 65% |
Heat Treatment Specifications
Optimal heat treatment parameters for AISI 4140:
- Annealing: 872°C (1600°F) followed by slow furnace cooling
- Tempering: 205-649°C (400-1200°F) depending on desired hardness
- Hardening: Achieved through cold working or heating and quenching
- Forging: 926-1205°C (1700-2200°F)
Industrial Applications
AISI 4140 is widely used in critical engineering components including:
- High tensile shafts, bolts, nuts, and gears
- Pinions, spindles, and locomotive traction gears
- Pressure vessels, rear axles, and connecting rods
- Oil drill pipe joints and fishing tools for deep well applications
- Bending machine molds and other tooling applications
Processing Capabilities
Our processing services include precision cutting of round bars and flat sections to your required sizes. We also supply ground tool steel bars with tight tolerances and ground flat stock/gauge plate in standard and custom dimensions.
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Get in Touch
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Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
NO.288,YOUYI ROAD ,XI SHAN DISTRICT,WUXI CITY,CHINA
Contact Person
Gao Ben