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EN 1.7725 Steel vs. S31277 Stainless Steel

Both EN 1.7725 steel and S31277 stainless 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 EN 1.7725 steel and the bottom bar is S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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