UNS S45000 (Alloy 450, XM-25) Stainless Steel
Precipitation-Hardening Stainless Steels
annealed
Property Overview
Density7.8g/cm³
Elastic Modulus200GPa
Tensile Strength980MPa
Yield Strength730MPa
Brinell Hardness280HB
Maximum Service Temperature840°C
Chemical Composition
C
0 to 0.050%
CR
14 to 16%
NI
5.0 to 7.0%
MO
0.5 to 1.0%
MN
0 to 1.0%
SI
0 to 1.0%
P
0 to 0.040%
S
0 to 0.030%
CU
1.3 to 1.8%
FE
72.1 to 79.3%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
11 %
Fatigue Strength
400 MPa
Poisson's Ratio
0.28
Reduction in Area
45 %
Shear Modulus
76 GPa
Shear Strength
590 MPa
Tensile Strength: Ultimate (UTS)
980 MPa
Tensile Strength: Yield (Proof)
730 MPa
Hardness
Brinell Hardness
280
Rockwell C Hardness
28
Physical
Density
7.8 g/cm 3
Thermal
Latent Heat of Fusion
280 J/g
Maximum Temperature: Corrosion
400 °C
Maximum Temperature: Mechanical
840 °C
Melting Completion (Liquidus)
1440 °C
Melting Onset (Solidus)
1390 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
17 W/m-K
Thermal Diffusivity
4.5 mm 2 /s
Thermal Expansion
11 µm/m-K
Thermal Shock Resistance
33 points
Electrical
Electrical Conductivity: Equal Volume
2.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.5 % IACS
Calculated
PREN (Pitting Resistance)
17
Resilience: Ultimate (Unit Rupture Work)
100 MJ/m 3
Resilience: Unit (Modulus of Resilience)
1380 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
35 points
Strength to Weight: Bending
28 points
Environmental
Base Metal Price
13 % relative
Embodied Carbon
2.8 kg CO 2 /kg material
Embodied Energy
39 MJ/kg
Embodied Energy
39 MJ/kg 17 x 10 3 BTU/lb
Embodied Water
130 L/kg
Embodied Water
130 L/kg 15 gal/lb
Registered Designations & Aliases
Alloy 450S45000UNS S45000 (Alloy 450, XM-25) Stainless SteelXM-25
Standards
ASTM A564 ASTM A564: Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
ASTM A564 ASTM A564: Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels Corrosion of Stainless Steels, A. John Sedriks, 1996
ASTM A959 ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels