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ASTM Grade HI Steel vs. N08320 Stainless Steel

Both ASTM grade HI steel and N08320 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HI steel and the bottom bar is N08320 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
40
Fatigue Strength, MPa 150
190
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 550
580
Tensile Strength: Yield (Proof), MPa 270
220

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1350
1350
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 23
28
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 4.1
4.9
Embodied Energy, MJ/kg 59
69
Embodied Water, L/kg 200
200

Common Calculations

PREN (Pitting Resistance) 29
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
180
Resilience: Unit (Modulus of Resilience), kJ/m3 180
120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 20
20
Strength to Weight: Bending, points 19
20
Thermal Diffusivity, mm2/s 3.9
3.3
Thermal Shock Resistance, points 12
13

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.050
Chromium (Cr), % 26 to 30
21 to 23
Iron (Fe), % 46.9 to 59.8
40.4 to 50
Manganese (Mn), % 0 to 2.0
0 to 2.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 14 to 18
25 to 27
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030