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ASTM Grade HN Steel vs. S44626 Stainless Steel

Both ASTM grade HN steel and S44626 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is S44626 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.0
23
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 500
540

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 420
560
Maximum Temperature: Mechanical, °C 1080
1100
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 13
17
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 26
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.6
2.9
Embodied Energy, MJ/kg 66
42
Embodied Water, L/kg 180
160

Common Calculations

PREN (Pitting Resistance) 22
30
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 17
19
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 3.5
4.6
Thermal Shock Resistance, points 11
18

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.060
Chromium (Cr), % 19 to 23
25 to 27
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 44.9 to 57.8
68.1 to 74.1
Manganese (Mn), % 0 to 2.0
0 to 0.75
Molybdenum (Mo), % 0 to 0.5
0.75 to 1.5
Nickel (Ni), % 23 to 27
0 to 0.5
Nitrogen (N), % 0
0 to 0.040
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.020
Titanium (Ti), % 0
0.2 to 1.0