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S43940 Stainless Steel vs. EN 1.6957 Steel

Both S43940 stainless steel and EN 1.6957 steel are iron alloys. They have 82% 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 S43940 stainless steel and the bottom bar is EN 1.6957 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 21
18
Fatigue Strength, MPa 180
530
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 310
570
Tensile Strength: Ultimate (UTS), MPa 490
930
Tensile Strength: Yield (Proof), MPa 280
780

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 890
450
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
47
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
5.0
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.6
2.1
Embodied Energy, MJ/kg 38
29
Embodied Water, L/kg 120
60

Common Calculations

PREN (Pitting Resistance) 18
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 86
160
Resilience: Unit (Modulus of Resilience), kJ/m3 200
1630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
33
Strength to Weight: Bending, points 18
27
Thermal Diffusivity, mm2/s 6.8
13
Thermal Shock Resistance, points 18
27

Alloy Composition

Carbon (C), % 0 to 0.030
0.22 to 0.32
Chromium (Cr), % 17.5 to 18.5
1.2 to 1.8
Iron (Fe), % 78.2 to 82.1
92.7 to 94.7
Manganese (Mn), % 0 to 1.0
0.15 to 0.4
Molybdenum (Mo), % 0
0.25 to 0.45
Nickel (Ni), % 0
3.4 to 4.0
Niobium (Nb), % 0.3 to 0.6
0
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.15
Sulfur (S), % 0 to 0.015
0 to 0.0070
Titanium (Ti), % 0.1 to 0.6
0
Vanadium (V), % 0
0.050 to 0.15