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AISI 309H Stainless Steel vs. EN 1.7321 Steel

Both AISI 309H stainless steel and EN 1.7321 steel are iron alloys. They have 64% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is AISI 309H stainless steel and the bottom bar is EN 1.7321 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
150 to 170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 580
490 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1080
410
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
45
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.5
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
1.5
Embodied Energy, MJ/kg 51
20
Embodied Water, L/kg 170
50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
17 to 52
Strength to Weight: Bending, points 20
18 to 36
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 13
14 to 43

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.17 to 0.23
Chromium (Cr), % 22 to 24
0.3 to 0.6
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 58.1 to 66
97.1 to 98.4
Manganese (Mn), % 0 to 2.0
0.7 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.5
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 0.75
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.025