4130 steel

4130 steel
AISI 4130 steel is a type of alloy steel that contains chromium and molybdenum. It is known for its high strength, toughness, and excellent weldability. This steel is commonly used in applications such as aircraft parts, structural tubing, and racing car components. It offers good resistance to fatigue and impact, making it suitable for demanding environments.
4130 Steel Bar Chemical Composition
Cr | Mn | C | Si | Mo | Si | P |
0.80 – 1.10 | 0.40 – 0.60 | 0.280 – 0.330 | 0.15 – 0.30 | 0.15 – 0.25 | 0.04 | 0.035 |
Physical Properties
Properties | Metric | Imperial |
Density | 7.85 g/cm3 | 0.284 lb/in³ |
Melting point | 1432°C | 2610°F |
Mechanical Properties
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 |
Other Designations
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 |
Application
Type 4130 steel is an exceptionally tough metal vital to manufacturing, welding, cutting, and other high-stress applications in industry. Its great heat treatment characteristics impart a high toughness and, combined with its great workability and machinability, allows 4130 steel to be widely useful. Though most often implemented as structural steel, there are some other notable applications, such as:
- Manufacturing equipment for bearings, vehicle parts, and gears
- Rock crushing machinery
- Resistance welding products
- Drill bitsand taps
- Mills and cutters
Fabrication and Heat Treatment
Machinability – AISI 4130 steel can be easily machined using conventional methods. However, machining becomes difficult when the hardness of the steel is increased.
Forming of AISI 4130 steel can be performed in the annealed condition.
- Welding of AISI 4130 steel can be performed by all commercial methods.
- Heat Treatment – AISI 4130 steel is heated at 871°C (1600°F) and then quenched in oil. This steel is usually heat-treated at temperatures ranging from 899 to 927°C (1650 to 1700°F).
- Forging of AISI 4130 steel can be performed at 954 to 1204°C (1750 to 2200°F).
- Hot working of AISI 4130 steel can be done at 816 to 1093°C (1500 to 2000°F).
- AISI 4130 steel can be cold worked using conventional methods.
- AISI 4130 steel can be annealed at 843°C (1550°F) followed by air cooling at 482°C (900°F).
- Tempering of AISI 4130 steel can be performed at 399 to 566°C (750 to 1050°F), depending on the desired strength level.
- Hardening of AISI 4130 steel can be done with cold working or heat treatment.
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Qilu has a large stock of rolled and forged bars from Dongbei Special Steel ,Shi-Steel ,Huai-Steel with a short delivery time .We also stock other products which can cover carbon steel ,alloy steel ,tool and mould steel,stainless steel in different shapes and sizes.Our stock of steel exceeds 12,000 tons all year round.
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Shandong Qilu lndustrial Co.,Ltd.established from the year of 1985,we are engaged in supplying forged steel products.Having a full line service from smelting,forging,heat treatment,surface process to logisitics.We’ve served of customers in abroad and domestic market,familiar with the standards in different countries.Since 2016,we’ve to broaden our range of products,invested a forged products factory and set up two main warehouses aiming to provide a better service relating steel products.
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