EN 1.6587 (18CrNiMo7-6) Case-Hardening Bearing Steel
Other Steels
annealed
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength650MPa
Yield Strength400MPa
Brinell Hardness200HB
Maximum Service Temperature440°C
Chemical Composition
C
0.15 to 0.21%
CR
1.5 to 1.8%
NI
1.4 to 1.7%
MO
0.25 to 0.35%
MN
0.5 to 0.9%
SI
0 to 0.4%
P
0 to 0.025%
S
0 to 0.030%
CU
0 to 0.3%
AL
0 to 0.050%
O
0 to 0.0020%
FE
94.4 to 96.4%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
22 %
Fatigue Strength
290 MPa
Poisson's Ratio
0.29
Shear Modulus
73 GPa
Shear Strength
410 MPa
Tensile Strength: Ultimate (UTS)
650 MPa
Tensile Strength: Yield (Proof)
400 MPa
Hardness
Brinell Hardness
200
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
440 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
41 W/m-K
Thermal Diffusivity
11 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
19 points
Electrical
Electrical Conductivity: Equal Volume
7.6 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.8 % IACS
Calculated
PREN (Pitting Resistance)
2.6
Resilience: Ultimate (Unit Rupture Work)
130 MJ/m 3
Resilience: Unit (Modulus of Resilience)
430 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
21 points
Environmental
Base Metal Price
3.8 % relative
Embodied Carbon
1.7 kg CO 2 /kg material
Embodied Energy
22 MJ/kg
Embodied Energy
22 MJ/kg 9.7 x 10 3 BTU/lb
Embodied Water
58 L/kg
Embodied Water
58 L/kg 6.9 gal/lb
Registered Designations & Aliases
1.65871.658718CrNiMo7-618CrNiMo7-6EN 1.6587 (18CrNiMo7-6) Case-Hardening Bearing Steel
Standards
EN 10084 EN 10084: 2008 Case hardening steels. Technical delivery conditions
ISO 683-17 ISO 683-17: Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing steels
ISO 683-17 ISO 683-17: Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing steels Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005