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S31277 Stainless Steel vs. EN 1.7725 Steel

Both S31277 stainless steel and EN 1.7725 steel are iron alloys. They have 44% 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 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 45
14
Fatigue Strength, MPa 380
390 to 550
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 860
830 to 1000
Tensile Strength: Yield (Proof), MPa 410
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
440
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 36
2.9
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.7
1.8
Embodied Energy, MJ/kg 90
24
Embodied Water, L/kg 220
54

Common Calculations

PREN (Pitting Resistance) 51
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 410
980 to 1940
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
29 to 35
Strength to Weight: Bending, points 25
25 to 28
Thermal Shock Resistance, points 19
24 to 29

Alloy Composition

Carbon (C), % 0 to 0.020
0.27 to 0.34
Chromium (Cr), % 20.5 to 23
1.3 to 1.7
Copper (Cu), % 0.5 to 1.5
0
Iron (Fe), % 35.5 to 46.2
95.7 to 97.5
Manganese (Mn), % 0 to 3.0
0.6 to 1.0
Molybdenum (Mo), % 6.5 to 8.0
0.3 to 0.5
Nickel (Ni), % 26 to 28
0
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.030
Vanadium (V), % 0
0.050 to 0.15