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EN 1.6958 Steel vs. EN 1.4031 Stainless Steel

Both EN 1.6958 steel and EN 1.4031 stainless steel are iron alloys. They have 87% 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 1.6958 steel and the bottom bar is EN 1.4031 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
11 to 13
Fatigue Strength, MPa 700
220 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 700
400 to 540
Tensile Strength: Ultimate (UTS), MPa 1140
670 to 900
Tensile Strength: Yield (Proof), MPa 1070
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 450
770
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 47
30
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
7.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.0
1.9
Embodied Energy, MJ/kg 27
27
Embodied Water, L/kg 60
100

Common Calculations

PREN (Pitting Resistance) 2.9
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
77 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 3050
380 to 1360
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 40
24 to 32
Strength to Weight: Bending, points 31
22 to 27
Thermal Diffusivity, mm2/s 13
8.1
Thermal Shock Resistance, points 39
23 to 32

Alloy Composition

Aluminum (Al), % 0.0050 to 0.050
0
Carbon (C), % 0.25 to 0.3
0.36 to 0.42
Chromium (Cr), % 1.2 to 1.7
12.5 to 14.5
Iron (Fe), % 92.6 to 94.5
83 to 87.1
Manganese (Mn), % 0.2 to 0.5
0 to 1.0
Molybdenum (Mo), % 0.35 to 0.55
0
Nickel (Ni), % 3.3 to 3.8
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.15 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0 to 0.12
0