MakeItFrom.com
Menu (ESC)

EN 1.7725 Steel vs. S31727 Stainless Steel

Both EN 1.7725 steel and S31727 stainless steel are iron alloys. They have 60% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
40
Fatigue Strength, MPa 390 to 550
240
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
630
Tensile Strength: Yield (Proof), MPa 610 to 860
270

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 440
1010
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.8
4.7
Embodied Energy, MJ/kg 24
64
Embodied Water, L/kg 54
180

Common Calculations

PREN (Pitting Resistance) 2.8
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
200
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 35
22
Strength to Weight: Bending, points 25 to 28
20
Thermal Shock Resistance, points 24 to 29
14

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.030
Chromium (Cr), % 1.3 to 1.7
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Iron (Fe), % 95.7 to 97.5
53.7 to 61.3
Manganese (Mn), % 0.6 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.3 to 0.5
3.8 to 4.5
Nickel (Ni), % 0
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.050 to 0.15
0