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EN 1.4729 Stainless Steel vs. EN 1.1121 Steel

Both EN 1.4729 stainless steel and EN 1.1121 steel are iron alloys. Both are furnished in the annealed condition. They have 84% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is EN 1.4729 stainless steel and the bottom bar is EN 1.1121 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
120
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 15
28
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 850
400
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 24
53
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
1.8
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.1
1.4
Embodied Energy, MJ/kg 29
18
Embodied Water, L/kg 100
45

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Thermal Diffusivity, mm2/s 6.5
14

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.070 to 0.13
Chromium (Cr), % 12 to 14
0
Iron (Fe), % 80.4 to 86.7
98.8 to 99.63
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 1.0 to 2.5
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035