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EN 1.3955 Stainless Steel vs. S31730 Stainless Steel

Both EN 1.3955 stainless steel and S31730 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.3955 stainless steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
40
Fatigue Strength, MPa 150
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 520
540
Tensile Strength: Yield (Proof), MPa 220
200

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 930
990
Melting Completion (Liquidus), °C 1430
1430
Melting Onset (Solidus), °C 1380
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 16
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.2
4.6
Embodied Energy, MJ/kg 45
63
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 19
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
170
Resilience: Unit (Modulus of Resilience), kJ/m3 130
99
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
18
Thermal Shock Resistance, points 15
12

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 16.5 to 18.5
17 to 19
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 65.5 to 73.5
52.4 to 61
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.75
3.0 to 4.0
Nickel (Ni), % 10 to 12
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010