Valve Steel X40crsimo10-2 1.4731 Stainless Steel Round 4cr10si2mo Steel Rod

X40CrSiMo10-2 is a martensitic stainless steel that is primarily used for manufacturing exhaust valves and other high-temperature components in internal combustion engines. It is known for its excellent high-temperature strength, oxidation resistance, and wear resistance.

• Carbon (C): 0.35 - 0.45

• Silicon (Si): 2.00 - 3.00

• Manganese (Mn): ≤ 0.80

• Phosphorus (P): Max 0.04

• Sulfur (S): Max 0.03

• Chromium (Cr): 9.50 - 11.50

• Molybdenum (Mo): 0.80 - 1.30

• Nickel (Ni): Max 0.50

• Proof Strength (Rp0.2): ≥ 350 MPa

• Tensile Strength (Rm): ≥ 650 MPa

• Impact Energy (KV): 275 J

• Elongation at Fracture (A): 8% - 25%

• Reduction in Cross Section on Fracture (Z): 21%

• Brinell Hardness (HBW): 200 - 250

• Density: 7.85 g/cm3

• Thermal Expansion: 10 - 10 e-6/K

• Thermal Conductivity: 25 W/m·K

• Specific Heat: 460 J/kg·K

• Melting Temperature: 1450 - 1510 °C

• Resistivity: 0.55 Ohm·mm2/m

• Annealing: Typically involves heating to a temperature range of 850°C - 870°C, followed by slow cooling to achieve a soft and ductile microstructure.

• Quenching: Heating to a temperature of 1050°C, holding for a period, and then air cooling.

• Tempering: After quenching, tempering at 600°C to achieve the desired hardness and toughness.

• Normalizing: Heating to a temperature of 850°C - 870°C, followed by air cooling.

• Quenching and Tempering (Q&T): Quenching followed by tempering to achieve a combination of high strength and toughness.

X40CrSiMo10-2 steel is widely used in the automotive and industrial sectors for components that require high strength and good wear resistance at elevated temperatures. It is particularly suitable for:

• Engine Valves: Due to its high-temperature strength and resistance to oxidation and corrosion.

• High-Temperature Components: Such as exhaust systems, turbochargers, and other parts that operate in high-temperature environments.

X40CrSiMo10-2 steel is covered by the following standards:

• DIN/EN: X40CrSiMo10-2

• AISI/SAE: SUH3

• WNR: 1.4731

• AFNOR: Z40CSD10

• UNF: F.3221-X40CrSiMo10-02

• JS1: SUH3

Our factory mainly produce below vavle steel grades:
Din 1.4718 X45crsi93 and jis suh1 china 4cr9si2 vavle steel
Din 1.4871 X53crmnnin21-9 astm21-4N and JIS SUH35 vavle steel

DIN X40CrSiMo10-2  1.4731 JIS SUH3 China 4cr10si2mo vavle steel

21-2N X55CrMnNiN20-8 1.4875 x55cr2mn8ni2n vavle steel

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