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ASTM Grade HI Steel vs. S40920 Stainless Steel

Both ASTM grade HI steel and S40920 stainless steel are iron alloys. They have 66% 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 S40920 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
22
Fatigue Strength, MPa 150
130
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
75
Tensile Strength: Ultimate (UTS), MPa 550
430
Tensile Strength: Yield (Proof), MPa 270
190

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 450
450
Maximum Temperature: Mechanical, °C 1100
710
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 15
26
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 23
6.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.1
2.0
Embodied Energy, MJ/kg 59
28
Embodied Water, L/kg 200
94

Common Calculations

PREN (Pitting Resistance) 29
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
78
Resilience: Unit (Modulus of Resilience), kJ/m3 180
97
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
15
Strength to Weight: Bending, points 19
16
Thermal Diffusivity, mm2/s 3.9
6.9
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0.2 to 0.5
0 to 0.030
Chromium (Cr), % 26 to 30
10.5 to 11.7
Iron (Fe), % 46.9 to 59.8
85.1 to 89.4
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 14 to 18
0 to 0.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0
0 to 0.030
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 0.020
Titanium (Ti), % 0
0.15 to 0.5