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EN 1.4988 Stainless Steel vs. S31277 Stainless Steel

Both EN 1.4988 stainless steel and S31277 stainless steel are iron alloys. They have 73% of their average alloy composition in common. There are 28 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 S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 34
45
Fatigue Strength, MPa 230
380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Shear Strength, MPa 430
600
Tensile Strength: Ultimate (UTS), MPa 640
860
Tensile Strength: Yield (Proof), MPa 290
410

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 520
430
Maximum Temperature: Mechanical, °C 920
1100
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 23
36
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 6.0
6.7
Embodied Energy, MJ/kg 89
90
Embodied Water, L/kg 150
220

Common Calculations

PREN (Pitting Resistance) 22
51
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
320
Resilience: Unit (Modulus of Resilience), kJ/m3 210
410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
29
Strength to Weight: Bending, points 21
25
Thermal Shock Resistance, points 14
19

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.020
Chromium (Cr), % 15.5 to 17.5
20.5 to 23
Copper (Cu), % 0
0.5 to 1.5
Iron (Fe), % 62.1 to 69.5
35.5 to 46.2
Manganese (Mn), % 0 to 1.5
0 to 3.0
Molybdenum (Mo), % 1.1 to 1.5
6.5 to 8.0
Nickel (Ni), % 12.5 to 14.5
26 to 28
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0.3 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.3 to 0.6
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.010
Vanadium (V), % 0.6 to 0.85
0