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EN 1.4988 Stainless Steel vs. S31730 Stainless Steel

Both EN 1.4988 stainless steel and S31730 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4988 stainless steel and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
40
Fatigue Strength, MPa 230
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 430
370
Tensile Strength: Ultimate (UTS), MPa 640
540
Tensile Strength: Yield (Proof), MPa 290
200

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 520
420
Maximum Temperature: Mechanical, °C 920
990
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 23
24
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 6.0
4.6
Embodied Energy, MJ/kg 89
63
Embodied Water, L/kg 150
180

Common Calculations

PREN (Pitting Resistance) 22
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
170
Resilience: Unit (Modulus of Resilience), kJ/m3 210
99
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
19
Strength to Weight: Bending, points 21
18
Thermal Shock Resistance, points 14
12

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.030
Chromium (Cr), % 15.5 to 17.5
17 to 19
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 62.1 to 69.5
52.4 to 61
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 1.1 to 1.5
3.0 to 4.0
Nickel (Ni), % 12.5 to 14.5
15 to 16.5
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0 to 0.045
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.3 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010
Vanadium (V), % 0.6 to 0.85
0