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EN 1.4931 Steel vs. EN 1.4938 Stainless Steel

Both EN 1.4931 steel and EN 1.4938 stainless steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 30 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 1.4931 steel and the bottom bar is EN 1.4938 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
16 to 17
Fatigue Strength, MPa 410
390 to 520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 810
870 to 1030
Tensile Strength: Yield (Proof), MPa 620
640 to 870

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 600
750
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 24
30
Thermal Expansion, µm/m-K 14
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.8
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 11
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.9
3.3
Embodied Energy, MJ/kg 42
47
Embodied Water, L/kg 100
110

Common Calculations

PREN (Pitting Resistance) 16
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 970
1050 to 1920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
31 to 37
Strength to Weight: Bending, points 25
26 to 29
Thermal Diffusivity, mm2/s 6.5
8.1
Thermal Shock Resistance, points 22
30 to 35

Alloy Composition

Carbon (C), % 0.2 to 0.26
0.080 to 0.15
Chromium (Cr), % 11.3 to 12.2
11 to 12.5
Iron (Fe), % 83.2 to 86.8
80.5 to 84.8
Manganese (Mn), % 0.5 to 0.8
0.4 to 0.9
Molybdenum (Mo), % 1.0 to 1.2
1.5 to 2.0
Nickel (Ni), % 0 to 1.0
2.0 to 3.0
Nitrogen (N), % 0
0.020 to 0.040
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.015
Tungsten (W), % 0 to 0.5
0
Vanadium (V), % 0.25 to 0.35
0.25 to 0.4