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S31730 Stainless Steel vs. ASTM Grade HN Steel

Both S31730 stainless steel and ASTM grade HN steel are iron alloys. They have 87% of their average alloy composition in common. There are 24 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 S31730 stainless steel and the bottom bar is ASTM grade HN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
9.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 540
500

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 990
1080
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1390
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 24
26
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 4.6
4.6
Embodied Energy, MJ/kg 63
66
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 30
22
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
17
Strength to Weight: Bending, points 18
18
Thermal Shock Resistance, points 12
11

Alloy Composition

Carbon (C), % 0 to 0.030
0.2 to 0.5
Chromium (Cr), % 17 to 19
19 to 23
Copper (Cu), % 4.0 to 5.0
0
Iron (Fe), % 52.4 to 61
44.9 to 57.8
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 3.0 to 4.0
0 to 0.5
Nickel (Ni), % 15 to 16.5
23 to 27
Nitrogen (N), % 0 to 0.045
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.010
0 to 0.040