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EN 1.4422 Stainless Steel vs. EN 1.6958 Steel

Both EN 1.4422 stainless steel and EN 1.6958 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 86% 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 1.4422 stainless steel and the bottom bar is EN 1.6958 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
16
Fatigue Strength, MPa 380
700
Impact Strength: V-Notched Charpy, J 110
63
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 520
700
Tensile Strength: Ultimate (UTS), MPa 850
1140
Tensile Strength: Yield (Proof), MPa 630
1070

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 760
450
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
47
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 11
5.0
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.7
2.0
Embodied Energy, MJ/kg 37
27
Embodied Water, L/kg 110
60

Common Calculations

PREN (Pitting Resistance) 17
2.9
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
3050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 30
40
Strength to Weight: Bending, points 25
31
Thermal Diffusivity, mm2/s 4.3
13
Thermal Shock Resistance, points 31
39

Alloy Composition

Aluminum (Al), % 0
0.0050 to 0.050
Carbon (C), % 0 to 0.020
0.25 to 0.3
Chromium (Cr), % 11 to 13
1.2 to 1.7
Copper (Cu), % 0.2 to 0.8
0
Iron (Fe), % 76.8 to 83.5
92.6 to 94.5
Manganese (Mn), % 0 to 2.0
0.2 to 0.5
Molybdenum (Mo), % 1.3 to 1.8
0.35 to 0.55
Nickel (Ni), % 4.0 to 5.0
3.3 to 3.8
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 0.5
0.15 to 0.3
Sulfur (S), % 0 to 0.0030
0 to 0.015
Vanadium (V), % 0
0 to 0.12