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S31277 Stainless Steel vs. EN 1.7720 Steel

Both S31277 stainless steel and EN 1.7720 steel are iron alloys. They have 43% of their average alloy composition in common. There are 26 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 S31277 stainless steel and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
19
Fatigue Strength, MPa 380
230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 860
590
Tensile Strength: Yield (Proof), MPa 410
340

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 36
2.8
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 6.7
2.2
Embodied Energy, MJ/kg 90
30
Embodied Water, L/kg 220
51

Common Calculations

PREN (Pitting Resistance) 51
2.1
Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
97
Resilience: Unit (Modulus of Resilience), kJ/m3 410
300
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
21
Strength to Weight: Bending, points 25
20
Thermal Shock Resistance, points 19
17

Alloy Composition

Carbon (C), % 0 to 0.020
0.1 to 0.15
Chromium (Cr), % 20.5 to 23
0.3 to 0.5
Copper (Cu), % 0.5 to 1.5
0 to 0.3
Iron (Fe), % 35.5 to 46.2
96.6 to 98.6
Manganese (Mn), % 0 to 3.0
0.4 to 0.7
Molybdenum (Mo), % 6.5 to 8.0
0.4 to 0.6
Nickel (Ni), % 26 to 28
0 to 0.4
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.45
Sulfur (S), % 0 to 0.010
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3