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EN 1.7108 Steel vs. EN 1.7321 Steel

Both EN 1.7108 steel and EN 1.7321 steel are iron alloys. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.7108 steel and the bottom bar is EN 1.7321 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 510
150 to 170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 670 to 2070
490 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 410
410
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 46
45
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.5
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 20
20
Embodied Water, L/kg 47
50

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24 to 75
17 to 52
Strength to Weight: Bending, points 22 to 47
18 to 36
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 20 to 63
14 to 43

Alloy Composition

Carbon (C), % 0.57 to 0.65
0.17 to 0.23
Chromium (Cr), % 0.2 to 0.45
0.3 to 0.6
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 95.9 to 96.9
97.1 to 98.4
Manganese (Mn), % 0.7 to 1.0
0.7 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.5
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 1.6 to 2.0
0 to 0.3
Sulfur (S), % 0 to 0.025
0 to 0.025

Comparable Variants