9Cr18Mo steel is China GB standard martensitic stainless steel. Equals 102Cr17Mo. After quenching, it has high hardness and wear resistance and high dimensional stability. The properties and uses of 9Cr18Mo are basically the same as those of 9Cr18 steel. But after quenching, it has higher hardness and anti-tempering stability. Molybdenum can increase the passivation effect of stainless steel.
9Cr18Mo Worldwide Equivalents
–
China
EU
Germany
Japan
Inter
US
Standard
GB
EN
DIN
JIS
ISO
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Grade
102Cr17Mo/ 9Cr18Mo
X105CrMo17 (1.4125)
X105CrMo17 (1.4125)
SUS 440C
X108CrMo17
440C
9Cr18Mo 102Cr17Mo Steel Chemical Composition
C
Si (≤)
Mn (≤)
P (≤)
S (≤)
Ni (≤)
Cr
Mo
0.95-1.10
0.80
0.80
0.040
0.030
0.60
16.00-18.00
0.40-0.70
9Cr18Mo 102Cr17Mo Steel Mechanical Properties
Material Rockwell hardness: ≥55 HRC (Quenching and tempering)
Material Brinell hardness: ≤269 HBW (steel bar after annealing)
9Cr18Mo 102Cr17Mo Steel Physical Properties
Density (g/cm3): 7.70
Specific heat capacity (J/Kg·K): 430 at 0-100℃
Thermal conductivity (W/m·K): 16.0 at 100℃
Electrical Resistivity (μΩ·m): 0.80 at 20℃
Longitudinal modulus of elasticity (kN/mm2): 215 at 20℃
Coefficients of linear thermal expansion
Temperature/℃
1-100
0-500
Coefficients of linear thermal expansion (10-6/K)
10.4
11.6
Heat Treatment
1、Annealing temperature of steel bars: 800-900℃ (Slow cooling)
2、Quenching temperature: 1000-1050℃ (Oil cooling)
3、Tempering temperature: 200-300℃ (Air cooling or Oil cooling)
102Cr17Mo Steel Application
1. 102Cr17Mo high carbon chromium stainless steel Application: Suitable for manufacturing bearings in seawater, river water, nitric acid, steam, marine. Such as bearings in ships, submersible pump components, bearings in petroleum and chemical machinery, marine instrument bearings.
2. 102Cr17Mo steel is suitable for good corrosion resistance (magnetic) tableware (knife), turbine blades. After quenching, the hardness is higher than that of 440A steel (magnetic). Such as blade, nozzle, valve, plate ruler, tableware (scissors) ).
102Cr17Mo Products
Product Type
Products
Dimension
Processes
Delivery Status
Plates / Sheets
Plates / Sheets
0.08-200mm(T)*W*L
Forging, hot rolling, and cold rolling
Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar
Round Bar, Flat Bar, Square Bar
Φ8-1200mm*L
Forging, hot rolling and cold rolling, Cast
Black, Rough Turning, Shot Blasting,
Coil / Strip
Steel Coil /Steel Strip
0.03-16.0x1200mm
Cold-Rolled & Hot-Rolled
Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
