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EN 1.4971 Stainless Steel vs. SAE-AISI M3 Class 1 Steel

Both EN 1.4971 stainless steel and SAE-AISI M3 class 1 steel are iron alloys. They have 41% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is SAE-AISI M3 class 1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 800
770 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 300
260
Melting Completion (Liquidus), °C 1460
1610
Melting Onset (Solidus), °C 1410
1570
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 13
26
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 70
25
Density, g/cm3 8.4
8.3
Embodied Carbon, kg CO2/kg material 7.6
10
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 300
100

Common Calculations

PREN (Pitting Resistance) 38
33
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 26
26 to 72
Strength to Weight: Bending, points 23
22 to 44
Thermal Diffusivity, mm2/s 3.4
7.2
Thermal Shock Resistance, points 19
24 to 67

Alloy Composition

Carbon (C), % 0.080 to 0.16
1.0 to 1.1
Chromium (Cr), % 20 to 22.5
3.8 to 4.5
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 24.3 to 37.1
76.9 to 82.9
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 2.5 to 3.5
4.8 to 6.5
Nickel (Ni), % 19 to 21
0 to 0.3
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.45
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 2.0 to 3.0
5.0 to 6.8
Vanadium (V), % 0
2.3 to 2.8