UNS S31277 (27-7Mo) Stainless Steel
Austenitic & General Stainless Steels
Property Overview
Density8.1g/cm³
Elastic Modulus210GPa
Tensile Strength860MPa
Yield Strength410MPa
Brinell HardnessUnknown
Maximum Service Temperature1100°C
Chemical Composition
C
0 to 0.020%
CR
20.5 to 23%
NI
26 to 28%
MO
6.5 to 8.0%
MN
0 to 3.0%
SI
0 to 0.5%
N
0.3 to 0.4%
P
0 to 0.030%
S
0 to 0.010%
CU
0.5 to 1.5%
FE
35.5 to 46.2%
Mechanical
Elastic (Young's, Tensile) Modulus
210 GPa
Elongation at Break
45 %
Fatigue Strength
380 MPa
Poisson's Ratio
0.28
Shear Modulus
80 GPa
Shear Strength
600 MPa
Tensile Strength: Ultimate (UTS)
860 MPa
Tensile Strength: Yield (Proof)
410 MPa
Physical
Density
8.1 g/cm 3
Thermal
Latent Heat of Fusion
310 J/g
Maximum Temperature: Corrosion
430 °C
Maximum Temperature: Mechanical
1100 °C
Melting Completion (Liquidus)
1460 °C
Melting Onset (Solidus)
1410 °C
Specific Heat Capacity
460 J/kg-K
Thermal Expansion
16 µm/m-K
Thermal Shock Resistance
19 points
Calculated
PREN (Pitting Resistance)
51
Resilience: Ultimate (Unit Rupture Work)
320 MJ/m 3
Resilience: Unit (Modulus of Resilience)
410 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
29 points
Strength to Weight: Bending
25 points
Environmental
Base Metal Price
36 % relative
Embodied Carbon
6.7 kg CO 2 /kg material
Embodied Energy
90 MJ/kg
Embodied Energy
90 MJ/kg 39 x 10 3 BTU/lb
Embodied Water
220 L/kg
Embodied Water
220 L/kg 26 gal/lb
Registered Designations & Aliases
27-7MoS31277UNS S31277 (27-7Mo) Stainless Steel
Standards
ASTM A240 ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications