Steel 95Cr18, 9Cr18 stainless steel equivalent, composition, properties

95Cr18 (9Cr18 steel)

Chinese GB 95Cr18 (9Cr18 steel) is a high-carbon, high-chromium martensitic stainless steel, which has improved corrosion resistance compared with Cr17 steel, and other properties are similar to Cr17.

95Cr18 is the new name for 9Cr18, that is, 9Cr18 = 95Cr18.

9Cr18 stainless steel mainly used in manufacturing corrosion-resistant and high wear-resistant components such as shafts, pumps, valve parts, rods, springs, fasteners, etc. the quality and performance of steel, attention must be paid to production.

Datasheet and specification

The chemical composition, mechanical properties and physical properties are given in the following data sheet.

Chemical Composition of Stainless Steel 95Cr18, 9Cr18

Mechanical Properties of 9Cr18 Steel

• HRC hardness of the material: ≥ 55 (quenching and tempering);
• Material HBW hardness: ≤ 255 (annealing)

Physical properties

• Density (g/cm3): 7.70
• Melting point: 1377-1510
• Specific heat capacity (J/Kg·K): 480 at 0-100°C
• Thermal conductivity (W/m·K): 29.3 at 100°C
• Linear thermal expansion coefficients (10 ^-6 /K):
  • 10.5 (0-100°C)
  • 12.0 (0-500°C)
• Electrical Resistivity (μΩ·m): 0.60 at 20℃
• Longitudinal modulus of elasticity (kN/mm2): 200 to 20°C.
• Magnetic: Yes

Heat Treatment Specification

• Annealing: 800 – 920 ℃ (slow cooling)
• Quenching: 1000 – 1050 ℃ (oil cooling)
• Quenching: 200 – 300 ℃ (oil or air cooling)

Equivalence

(95Cr18) 9Cr18 steel equivalent to US ASTM, Japanese JIS, German European DIN and France NF standard for reference.