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ASTM Grade HN Steel vs. EN 1.7707 Steel

Both ASTM grade HN steel and EN 1.7707 steel are iron alloys. They have 55% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is EN 1.7707 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 9.0
11
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 500
1010

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1080
460
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 13
39
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 26
3.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.6
1.9
Embodied Energy, MJ/kg 66
27
Embodied Water, L/kg 180
58

Common Calculations

PREN (Pitting Resistance) 22
3.2
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
36
Strength to Weight: Bending, points 18
29
Thermal Diffusivity, mm2/s 3.5
11
Thermal Shock Resistance, points 11
29

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.26 to 0.34
Chromium (Cr), % 19 to 23
2.3 to 2.7
Iron (Fe), % 44.9 to 57.8
94.7 to 96.8
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.25
Nickel (Ni), % 23 to 27
0 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035
Vanadium (V), % 0
0.1 to 0.2