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S31100 Stainless Steel vs. EN 1.6958 Steel

Both S31100 stainless steel and EN 1.6958 steel are iron alloys. They have 72% 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 S31100 stainless steel and the bottom bar is EN 1.6958 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
340
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 4.5
16
Fatigue Strength, MPa 330
700
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 580
700
Tensile Strength: Ultimate (UTS), MPa 1000
1140
Tensile Strength: Yield (Proof), MPa 710
1070

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
450
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
47
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 16
5.0
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.1
2.0
Embodied Energy, MJ/kg 44
27
Embodied Water, L/kg 170
60

Common Calculations

PREN (Pitting Resistance) 26
2.9
Resilience: Ultimate (Unit Rupture Work), MJ/m3 40
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1240
3050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 36
40
Strength to Weight: Bending, points 29
31
Thermal Diffusivity, mm2/s 4.2
13
Thermal Shock Resistance, points 28
39

Alloy Composition

Aluminum (Al), % 0
0.0050 to 0.050
Carbon (C), % 0 to 0.060
0.25 to 0.3
Chromium (Cr), % 25 to 27
1.2 to 1.7
Iron (Fe), % 63.6 to 69
92.6 to 94.5
Manganese (Mn), % 0 to 1.0
0.2 to 0.5
Molybdenum (Mo), % 0
0.35 to 0.55
Nickel (Ni), % 6.0 to 7.0
3.3 to 3.8
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 1.0
0.15 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Vanadium (V), % 0
0 to 0.12