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EN 1.6958 Steel vs. EN 1.4935 Stainless Steel

Both EN 1.6958 steel and EN 1.4935 stainless steel are iron alloys. They have 88% 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 1.4935 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
16 to 18
Fatigue Strength, MPa 700
350 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 700
480 to 540
Tensile Strength: Ultimate (UTS), MPa 1140
780 to 880
Tensile Strength: Yield (Proof), MPa 1070
570 to 670

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 450
740
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 47
24
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
9.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.9
Embodied Energy, MJ/kg 27
42
Embodied Water, L/kg 60
100

Common Calculations

PREN (Pitting Resistance) 2.9
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
130
Resilience: Unit (Modulus of Resilience), kJ/m3 3050
830 to 1160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 40
28 to 31
Strength to Weight: Bending, points 31
24 to 26
Thermal Diffusivity, mm2/s 13
6.5
Thermal Shock Resistance, points 39
27 to 30

Alloy Composition

Aluminum (Al), % 0.0050 to 0.050
0
Carbon (C), % 0.25 to 0.3
0.17 to 0.24
Chromium (Cr), % 1.2 to 1.7
11 to 12.5
Iron (Fe), % 92.6 to 94.5
83 to 86.7
Manganese (Mn), % 0.2 to 0.5
0.3 to 0.8
Molybdenum (Mo), % 0.35 to 0.55
0.8 to 1.2
Nickel (Ni), % 3.3 to 3.8
0.3 to 0.8
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0.15 to 0.3
0.1 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.015
Tungsten (W), % 0
0.4 to 0.6
Vanadium (V), % 0 to 0.12
0.2 to 0.35