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EN 1.4408 Stainless Steel vs. EN 1.6958 Steel

Both EN 1.4408 stainless steel and EN 1.6958 steel are iron alloys. They have 73% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4408 stainless steel and the bottom bar is EN 1.6958 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
340
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
16
Fatigue Strength, MPa 170
700
Impact Strength: V-Notched Charpy, J 67
63
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 510
1140
Tensile Strength: Yield (Proof), MPa 210
1070

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 990
450
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
47
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 18
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.7
2.0
Embodied Energy, MJ/kg 52
27
Embodied Water, L/kg 150
60

Common Calculations

PREN (Pitting Resistance) 26
2.9
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
180
Resilience: Unit (Modulus of Resilience), kJ/m3 110
3050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
40
Strength to Weight: Bending, points 18
31
Thermal Diffusivity, mm2/s 3.9
13
Thermal Shock Resistance, points 11
39

Alloy Composition

Aluminum (Al), % 0
0.0050 to 0.050
Carbon (C), % 0 to 0.070
0.25 to 0.3
Chromium (Cr), % 18 to 20
1.2 to 1.7
Iron (Fe), % 62.4 to 71
92.6 to 94.5
Manganese (Mn), % 0 to 1.5
0.2 to 0.5
Molybdenum (Mo), % 2.0 to 2.5
0.35 to 0.55
Nickel (Ni), % 9.0 to 12
3.3 to 3.8
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.5
0.15 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0
0 to 0.12