4130 Steel

4130 forged steel is typically used in the quenched and tempered state and is suitable for manufacturing parts with large cross-sections that operate under high stress conditions, such as shafts, spindles, gears, and high-pressure conduits.

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4130 Steel Forgings Applications:

4130 alloy steel is a medium-carbon low-alloy steel. After quenching and tempering, our 4130 alloy steel forgings exhibit high tensile and yield strengths, good ductility, and good impact toughness. These excellent properties ensure 4130 alloy steel forgings are the ideal blank materials for high stress and high impact loads parts. The fatigue strength limit of 4130 forged steel is approximately 40 ksi, making 4130 steel forgings suitable for components subjected to long-term vibration and cyclic loads..4130 steel can withstand nitrogen and hydrogen media environments below 250°C in chemical equipment.

Oil & Gas: Drill collars, tubes, flanges,
Chemical Industry: Tubes, flanges, sleeves, tube sheets
Machinery & Manufacturing: Gears, shafts, bearings, hydraulic cylinder clamps, drill bits, and cutters.
Aerospace: engine mounts, gears, fuselage components.

4130 Forged Steel Features：

4130 steel forgings have excellent comprehensive properties, including high strength, good toughness, excellent weldability, good machinability, good heat-treatment performance, high fatigue resistance, good corrosion resistance, high-temperature stability, wide applicability, and good ductility.

High strength

After quenching and tempering, 4130 steel forged parts can achieve high tensile strength (≥930 MPa), high yield strength (≥785 MPa),

Good toughness

good impact toughness and good ductility (elongation ≥12%).

Excellent weldability and good machinability

4130 forged steel is weldable and machinable.

Good heat-treatment response

The hardness and toughness of 4130 forged steel can be achieved through quenching and tempering processes to meet the requirements of different working conditions.

Good fatigue resistance

The fatigue strength limit of 4130 steel is approximately 40 ksi, making it suitable for components subjected to long-term vibration and cyclic loads.

Good Corrosion Resistance and High-Temperature Stability

4130 steel forgings have good corrosion resistance and maintain stable high-temperature strength in environments below 500℃.

Good Ductility

Exhibits excellent ductility when annealed (spheroidized), enabling good formability.

4130 Steel Properties

AISI 4130 alloy steel physical properties information table.

Properties	Metric	Metric Imperial
Density	7.85 g/cm3	0.284 lb/in³
Melting point	1432°C	2610°F

AISI 4130 alloy steel mechanical properties information table.

Properties	Metric	Metric Imperial
Tensile strength	560 MPa	81200 psi
Yield strength	460 MPa	66700 psi
Elongation at break (in 50 mm)	21.50 %	21.50 %
Reduction of area	59.6 %	59.6 %
Hardness, Brinell	217	217

AISI 4130 alloy steel thermal properties information table.

Properties	Metric	Metric Imperial
Thermal conductivity (@ 100°C)	42.7 W/mK	296 BTU in/hr.ft2. °F

4130 Steel Chemical Composition

The 4130 alloy steel chemical composition primarily includes carbon, silicon, manganese, chromium, and molybdenum. The material contains 0.28-0.33% carbon, 0.15-0.35% silicon, 0.40-0.60% manganese, 0.80-1.10% chromium, and 0.15-0.25% molybdenum.

Steel Grade	Carbon, C	Silicon, Si	Manganese, Mn	Phosphorous, P	Sulfur, S	Chromium, Cr	Molybdenum, Mo	Iron, Fe
4130	0.280 – 0.330	0.15 – 0.30	0.40 – 0.60	≤0.035	≤0.040	0.80 – 1.10	0.15 – 0.25	Balance

4130 Steel Equivalent

SAE 4130 alloy steel chemical composition information for reference.

EU EN	USA	Germany DIN,WNr	Japan JIS	France AFNOR	China GB	Inter ISO
25CrMo4 (1.7218)	SAE4130	25CrMo4	SCM420 SCM430	25CD4	30CrMo	25CrMo4

About Us

We are a leading 4130 steel forgings supplier and manufacturer in China.

Our 4130 steel forgings have high tensile strength, high yield strengths, good ductility and good impact toughness.

Due to the excellent comprehensive properties described above, our 4130 steel forgings are widely used across various industrial fields. Our 4130 steel forgings are suitable blank materials for high stress and impact loads parts, such as gears, shafts, spindles, tubes, and sleeves.

Feel free to contact us for price information about our 4130 steel forgings.

Open Die Forging & Ring Rolling Forging

We possess multiple free forging machines and ring rolling machines. Our free forging machines includes a 1-ton air hammer, a 2-ton hydraulic hammer, a 5-ton hydraulic forging machine, a 3500-ton hydraulic forging machine, and multiple ring rolling machines.

Our custom forged parts can weigh up to 20,000 kg and have a maximum length of 20 m. The outer diameter of the forged rings can reach 4.5 m.

Why Choose Shanghai FAR WELL?

We are professional steel forging company in China for forged steel parts. Our factory is 200KM away from Shanghai Port. We are a modern management steel forging company targeting the international market.