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EN 1.4550 Stainless Steel vs. EN 1.6958 Steel

Both EN 1.4550 stainless steel and EN 1.6958 steel are iron alloys. They have 75% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4550 stainless steel and the bottom bar is EN 1.6958 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
340
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 42
16
Fatigue Strength, MPa 210
700
Impact Strength: V-Notched Charpy, J 90
63
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 430
700
Tensile Strength: Ultimate (UTS), MPa 620
1140
Tensile Strength: Yield (Proof), MPa 230
1070

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
450
Melting Completion (Liquidus), °C 1430
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 2.4
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
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 3.6
2.0
Embodied Energy, MJ/kg 51
27
Embodied Water, L/kg 140
60

Common Calculations

PREN (Pitting Resistance) 18
2.9
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
180
Resilience: Unit (Modulus of Resilience), kJ/m3 140
3050
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
40
Strength to Weight: Bending, points 21
31
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 14
39

Alloy Composition

Aluminum (Al), % 0
0.0050 to 0.050
Carbon (C), % 0 to 0.080
0.25 to 0.3
Chromium (Cr), % 17 to 19
1.2 to 1.7
Iron (Fe), % 64.9 to 74
92.6 to 94.5
Manganese (Mn), % 0 to 2.0
0.2 to 0.5
Molybdenum (Mo), % 0
0.35 to 0.55
Nickel (Ni), % 9.0 to 12
3.3 to 3.8
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 1.0
0.15 to 0.3
Sulfur (S), % 0 to 0.015
0 to 0.015
Vanadium (V), % 0
0 to 0.12