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[China]
Address: Room 1703, 17th Floor, Building 5, Jinyin Modern City, Guangdian South Road, Jinshui District, Zhengzhou City, Henan Province, China.
Contact name:Vicky
Zhengzhou Huitong Pipeline Equipment Co.,Ltd. |
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black bright surface hot cold rolled 4130 4140 4340 alloy steel round bar rod
1. Alloy steels are designated by AISI four-digit numbers. They are more responsive to mechanical and heat treatments than carbon steels. They comprise different types of steels with compositions which exceed the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va in the carbon steels.
AISI 4130 alloy steel contains chromium and molybdenum as strengthening agents. It has low carbon content, and can be welded easily. The datasheet below provides further detail.
The chemical composition of AISI 4130 alloy steel is listed in the following table.
| Element | Content (%) |
| Iron, Fe | 97.03 – 98.22 |
| Chromium, Cr | 0.80 – 1.10 |
| Manganese, Mn | 0.40 – 0.60 |
| Carbon, C | 0.280 – 0.330 |
| Silicon, Si | 0.15 – 0.30 |
| Molybdenum, Mo | 0.15 – 0.25 |
| Sulfur, S | 0.040 |
| Phosphorous, P | 0.035 |
| Properties | Metric | Imperial |
| Density | 7.85 g/cm3 | 0.284 lb/in³ |
| Melting point | 1432°C | 2610°F |
| Properties | Metric | Imperial |
| Tensile strength, ultimate | 560 MPa | 81200 psi |
| Tensile strength, yield | 460 MPa | 66700 psi |
| Modulus of elasticity | 190-210 GPa | 27557-30458 ksi |
| Bulk modulus (Typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (Typical for steel) | 80 GPa | 11600 ksi |
| Poissons ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 21.50% | 21.50% |
| Reduction of area | 59.6 | 59.60% |
| Hardness, Brinell | 217 | 217 |
| Hardness, Knoop (Converted from Brinell hardness) | 240 | 240 |
| Hardness, Rockwell B (Converted from Brinell hardness) | 95 | 95 |
| Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.) | 17 | 17 |
| Hardness, Vickers (Converted from Brinell hardness) | 228 | 228 |
| Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.) | 70 | 70 |
| Properties | Metric | Imperial |
| Thermal conductivity (100°C) | 42.7 W/mK | 296 BTU in/hr.ft2. °F |
Other designations that are equivalent to AISI 4130 alloy steel include the following;
| AMS 6348 | AMS 6371 | ASTM A331 | ASTM A829 | DIN 1.7218 |
| AMS 6350 | AMS 6373 | ASTM A506 | MIL S-18729 | UNI 25 CrMo 4 |
| AMS 6351 | AMS 6374 | ASTM A507 | MIL S-6758 | JIS SCCrM 1 |
| AMS 6360 | AMS 6528 | ASTM A513 | SAE J1397 | JIS SCM 2 |
| AMS 6361 | AMS 7496 | ASTM A519 | SAE J404 | SS 2225 |
| AMS 6362 | ASTM A29 | ASTM A646 | SAE J412 | B.S. CDS 110 |
| AMS 6370 | ASTM A322 | ASTM A752 | AFNOR 25 CD 4 (S) | SAE J770 |
3. 4130 round bar pacakge
