EN 1.6957 (27NiCrMoV15-6) Nickel-Chromium Steel
Alloy Steels
Property Overview
Density7.9g/cm³
Elastic Modulus190GPa
Tensile Strength930MPa
Yield Strength780MPa
Brinell Hardness280HB
Maximum Service Temperature450°C
Chemical Composition
C
0.22 to 0.32%
CR
1.2 to 1.8%
NI
3.4 to 4.0%
MO
0.25 to 0.45%
MN
0.15 to 0.4%
SI
0 to 0.15%
P
0 to 0.010%
S
0 to 0.0070%
V
0.050 to 0.15%
FE
92.7 to 94.7%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Elongation at Break
18 %
Fatigue Strength
530 MPa
Impact Strength: V-Notched Charpy
71 J
Poisson's Ratio
0.29
Reduction in Area
46 %
Shear Modulus
73 GPa
Shear Strength
570 MPa
Tensile Strength: Ultimate (UTS)
930 MPa
Tensile Strength: Yield (Proof)
780 MPa
Hardness
Brinell Hardness
280
Physical
Density
7.9 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
450 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1420 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
47 W/m-K
Thermal Diffusivity
13 mm 2 /s
Thermal Expansion
13 µm/m-K
Thermal Shock Resistance
27 points
Electrical
Electrical Conductivity: Equal Volume
7.9 % IACS
Electrical Conductivity: Equal Weight (Specific)
9.1 % IACS
Calculated
PREN (Pitting Resistance)
2.7
Resilience: Ultimate (Unit Rupture Work)
160 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1630 kJ/m 3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
33 points
Strength to Weight: Bending
27 points
Environmental
Base Metal Price
5.0 % relative
Embodied Carbon
2.1 kg CO 2 /kg material
Embodied Energy
29 MJ/kg
Embodied Energy
29 MJ/kg 12 x 10 3 BTU/lb
Embodied Water
60 L/kg
Embodied Water
60 L/kg 7.2 gal/lb
Registered Designations & Aliases
1.695727NiCrMoV15-6EN 1.6957 (27NiCrMoV15-6) Nickel-Chromium Steel
Standards
EN 10269 EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties