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EN 1.4740 Stainless Steel vs. ASTM Grade HN Steel

Both EN 1.4740 stainless steel and ASTM grade HN steel are iron alloys. They have 71% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.4740 stainless steel and the bottom bar is ASTM grade HN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 22
9.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 900
1080
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1370
1350
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 18
13
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
26
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 2.3
4.6
Embodied Energy, MJ/kg 32
66
Embodied Water, L/kg 120
180

Common Calculations

PREN (Pitting Resistance) 18
22
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Thermal Diffusivity, mm2/s 4.8
3.5

Alloy Composition

Carbon (C), % 0.3 to 0.5
0.2 to 0.5
Chromium (Cr), % 16 to 19
19 to 23
Iron (Fe), % 75.4 to 82.7
44.9 to 57.8
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 0 to 1.0
23 to 27
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 1.0 to 2.5
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040