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9Cr18Mo, 440C, SUS440C, 1.4125 High Carbon Chromium Martensitic Stainless Steel- TJC STEEL.
 9Cr18Mo, also known as the American standard 440C martensitic stainless steel, is added to Mo on the basis of 9Cr18 steel, steel composition [TJC STEEL]is characterized by high carbon and high chromium.

 

  Standards:

CHINA

GB/T 1220-1992

9Cr18Mo

GB/T 1220-2007

102Cr17Mo,S45990

USA

ASTM A276-2006

440C,S44004

JAPAN

JIS G4303:2005[TJC STEEL]

SUS 440C

GERMANY

DIN EN 10088-1:2005

X105CrMo17,1.4125

 

  Chemical Composition(%):

GRADE

9Cr18Mo

440C

SUS 440C

1.4125

C

0.95~1.10

0.95~1.20

0.95~1.20

0.95~1.20

Si

≤0.80

≤1.00

≤1.00

≤1.00

Mn

≤0.80

≤1.00

≤1.00

≤1.00

P

≤0.035

≤0.040

≤0.040

≤0.040

S

≤0.030

≤0.030

≤0.030

≤0.030

Cr

16.0~18.0

16.0~18.0

16.0~18.0

16.0~18.0

Ni

(≤0.60)[TJC STEEL]

(≤0.60)

Mo

0.40~0.70

≤0.75

(≤0.75)

0.40~0.80

 

 Heat Treatment:

➣ Annealing: Heating to 850~870℃, holding 4~6h, 30℃/h cooling to 600℃, air cooling, hardness ≤255HBS;

➣ recrystallization annealing: heating to 730~750℃, air cooling;

➣ Quenching: Heating to 1050~1100℃, oil cooling;

➣ Tempering: Heating to 150~160℃, [TJC STEEL]holding for 2~5h, air cooling, hardness ≥58HRC.

 

Performance Characteristics

The quenching has high hardness and high wear resistance;

② It has excellent corrosion resistance in the atmosphere, water and some acid and salt aqueous solutions;

(3) Good high temperature [TJC STEEL]dimensional stability, the use of temperature does not exceed 250℃;

(4) tempering: heating to 150~160℃, heat preservation 2~5h, air cooling, hardness ≥58HRC.

 

Applications:

9Cr18Mo is suitable for the manufacture of bearings, bushings, and other parts or die parts that are both wear-resistant and [TJC STEEL]corrosion-resistant in corrosive environment and non-lubricating strong oxidation atmosphere.