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EN 1.7725 Steel vs. S35140 Stainless Steel

Both EN 1.7725 steel and S35140 stainless steel are iron alloys. They have 51% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.7725 steel and the bottom bar is S35140 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250 to 300
210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14
34
Fatigue Strength, MPa 390 to 550
250
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 830 to 1000
690
Tensile Strength: Yield (Proof), MPa 610 to 860
310

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 440
1100
Melting Completion (Liquidus), °C 1460
1420
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
14
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
31
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.8
5.5
Embodied Energy, MJ/kg 24
78
Embodied Water, L/kg 54
190

Common Calculations

PREN (Pitting Resistance) 2.8
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
190
Resilience: Unit (Modulus of Resilience), kJ/m3 980 to 1940
250
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29 to 35
24
Strength to Weight: Bending, points 25 to 28
22
Thermal Diffusivity, mm2/s 11
3.7
Thermal Shock Resistance, points 24 to 29
16

Alloy Composition

Carbon (C), % 0.27 to 0.34
0 to 0.1
Chromium (Cr), % 1.3 to 1.7
20 to 22
Iron (Fe), % 95.7 to 97.5
44.1 to 52.7
Manganese (Mn), % 0.6 to 1.0
1.0 to 3.0
Molybdenum (Mo), % 0.3 to 0.5
1.0 to 2.0
Nickel (Ni), % 0
25 to 27
Niobium (Nb), % 0
0.25 to 0.75
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.6
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.050 to 0.15
0