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S31803 Stainless Steel vs. EN 1.6956 Steel

Both S31803 stainless steel and EN 1.6956 steel are iron alloys. They have 73% 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 S31803 stainless steel and the bottom bar is EN 1.6956 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
370
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
9.6
Fatigue Strength, MPa 370
680
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 460
730
Tensile Strength: Ultimate (UTS), MPa 710
1230
Tensile Strength: Yield (Proof), MPa 500
1120

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1060
440
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
46
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 17
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
2.2
Embodied Energy, MJ/kg 49
31
Embodied Water, L/kg 160
60

Common Calculations

PREN (Pitting Resistance) 34
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
110
Resilience: Unit (Modulus of Resilience), kJ/m3 630
3320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
43
Strength to Weight: Bending, points 23
32
Thermal Diffusivity, mm2/s 4.3
12
Thermal Shock Resistance, points 20
36

Alloy Composition

Carbon (C), % 0 to 0.030
0.28 to 0.38
Chromium (Cr), % 21 to 23
1.0 to 1.7
Iron (Fe), % 63.7 to 71.9
92.4 to 95.3
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 2.5 to 3.5
0.3 to 0.6
Nickel (Ni), % 4.5 to 6.5
2.9 to 3.8
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.035
Vanadium (V), % 0
0.080 to 0.25