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EN 1.7139 Steel vs. AISI 446 Stainless Steel

Both EN 1.7139 steel and AISI 446 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 25 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 1.7139 steel and the bottom bar is AISI 446 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
79
Tensile Strength: Ultimate (UTS), MPa 480 to 1390
570

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 420
1180
Melting Completion (Liquidus), °C 1460
1510
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 44
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.4
Embodied Energy, MJ/kg 19
35
Embodied Water, L/kg 51
150

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 17 to 49
21
Strength to Weight: Bending, points 17 to 35
20
Thermal Diffusivity, mm2/s 12
4.6
Thermal Shock Resistance, points 14 to 41
19

Alloy Composition

Carbon (C), % 0.14 to 0.19
0 to 0.2
Chromium (Cr), % 0.8 to 1.1
23 to 27
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 96.8 to 98
69.2 to 77
Manganese (Mn), % 1.0 to 1.3
0 to 1.5
Nickel (Ni), % 0
0 to 0.75
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0.020 to 0.040
0 to 0.030