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EN 1.4550 Stainless Steel vs. EN 1.1122 Steel

Both EN 1.4550 stainless steel and EN 1.1122 steel are iron alloys. They have 70% 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 1.4550 stainless steel and the bottom bar is EN 1.1122 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
100 to 130
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 42
12 to 21
Fatigue Strength, MPa 210
170 to 260
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 430
240 to 290
Tensile Strength: Ultimate (UTS), MPa 620
340 to 460
Tensile Strength: Yield (Proof), MPa 230
240 to 370

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
400
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
51
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 18
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
1.4
Embodied Energy, MJ/kg 51
18
Embodied Water, L/kg 140
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
36 to 89
Resilience: Unit (Modulus of Resilience), kJ/m3 140
160 to 360
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
12 to 16
Strength to Weight: Bending, points 21
14 to 17
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 14
11 to 15

Alloy Composition

Carbon (C), % 0 to 0.080
0.080 to 0.12
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 64.9 to 74
98.7 to 99.62
Manganese (Mn), % 0 to 2.0
0.3 to 0.6
Nickel (Ni), % 9.0 to 12
0
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.015
0 to 0.025