ASTM 5140 high-carbon alloy structural steel is a steel commonly used in the construction industry because of its high strength and durability. Because it is composed of chromium and molybdenum, it is also known as AISI 5140 steel or chrome-molybdenum steel.
ASTM 5140 Alloy Steel Advantages:
* High tensile strength,
* Strong and durable
* Good toughness and wear resistance
* High corrosion resistance
Grade of our steel plate (ASTM Grade as Guide)
| Structural Steel | A283,A36,ABS Grade A, Grade B, Grade ADH36, Grade DH36, and Grade EH36,A514 T-1,A572 GR 50: |
| HSLA Structural Steel | A588,A656 GR80,A690 |
| Pressure vessel Steel | A285 GR C, A515 GR 70,A516 GR 70,SA537 |
| Abrasion resistant steel | AR360,AR400,AR450,AR500 |
| Alloy Steel | 5130,5140,5150,4130,4140 |
Relevant AISI 5140 Specification and Equivalent Steel Grades
| Country | USA | German | Japan |
| Standard | ASTM/AISI A29 | EN 10083-3 | JIS G4053 |
| Grades | 5140 | 41Cr4 | SCr440 |
ASTM 5140 Material Chemical Composition and Equivalent
| Standard | Grade/Steel Number | C | Mn | P | S | Si | Cr | Ni |
| ASTM A29 | 5140 | 0.38-0.43 | 0.70-0.90 | ≤0.035 | ≤0.040 | 0.15-0.35 | 0.70-0.90 | – |
| EN 10083-3 | 41Cr4 / 1.7035 | 0.38-0.45 | 0.60-0.90 | ≤0.025 | ≤0.035 | ≤0.40 | 0.90-1.20 | – |
| JIS G4053 | SCr440 | 0.38-0.43 | 0.60-0.90 | ≤0.030 | ≤0.030 | 0.15-0.35 | 0.90-1.20 | ≤0.25 |
ASTM 5140 Steel Heat Treat
Soft Annealing
Heat to 680-720℃, cool slowly. This will produce a maximum 5140 hardness of 241HB (Brinell hardness).
Noramlizing of steel grade 5140
Temperature: 840-880℃.
Hardening of 5140 forged steel
Harden from a temperature of 820-850, 830-860℃ followed by water or oil quenching.
Tempering of SAE 5140 material
Tempering temperature: 540-680℃.
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