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EN 1.4971 Stainless Steel vs. EN 1.6957 Steel

Both EN 1.4971 stainless steel and EN 1.6957 steel are iron alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 EN 1.6957 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
280
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 34
18
Fatigue Strength, MPa 270
530
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
73
Shear Strength, MPa 530
570
Tensile Strength: Ultimate (UTS), MPa 800
930
Tensile Strength: Yield (Proof), MPa 340
780

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
450
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 13
47
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 70
5.0
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 7.6
2.1
Embodied Energy, MJ/kg 110
29
Embodied Water, L/kg 300
60

Common Calculations

PREN (Pitting Resistance) 38
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
160
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
33
Strength to Weight: Bending, points 23
27
Thermal Diffusivity, mm2/s 3.4
13
Thermal Shock Resistance, points 19
27

Alloy Composition

Carbon (C), % 0.080 to 0.16
0.22 to 0.32
Chromium (Cr), % 20 to 22.5
1.2 to 1.8
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
92.7 to 94.7
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 2.5 to 3.5
0.25 to 0.45
Nickel (Ni), % 19 to 21
3.4 to 4.0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.15
Sulfur (S), % 0 to 0.015
0 to 0.0070
Tungsten (W), % 2.0 to 3.0
0
Vanadium (V), % 0
0.050 to 0.15