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EN 1.6957 Steel vs. S32750 Stainless Steel

Both EN 1.6957 steel and S32750 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.6957 steel and the bottom bar is S32750 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 18
17
Fatigue Strength, MPa 530
360
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Shear Strength, MPa 570
530
Tensile Strength: Ultimate (UTS), MPa 930
860
Tensile Strength: Yield (Proof), MPa 780
590

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 450
1100
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 47
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
21
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.1
4.1
Embodied Energy, MJ/kg 29
56
Embodied Water, L/kg 60
180

Common Calculations

PREN (Pitting Resistance) 2.7
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
130
Resilience: Unit (Modulus of Resilience), kJ/m3 1630
860
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33
31
Strength to Weight: Bending, points 27
26
Thermal Diffusivity, mm2/s 13
4.0
Thermal Shock Resistance, points 27
25

Alloy Composition

Carbon (C), % 0.22 to 0.32
0 to 0.030
Chromium (Cr), % 1.2 to 1.8
24 to 26
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 92.7 to 94.7
58.1 to 66.8
Manganese (Mn), % 0.15 to 0.4
0 to 1.2
Molybdenum (Mo), % 0.25 to 0.45
3.0 to 5.0
Nickel (Ni), % 3.4 to 4.0
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.010
0 to 0.035
Silicon (Si), % 0 to 0.15
0 to 0.8
Sulfur (S), % 0 to 0.0070
0 to 0.020
Vanadium (V), % 0.050 to 0.15
0