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ASTM Grade HI Steel vs. SAE-AISI 8630 Steel

Both ASTM grade HI steel and SAE-AISI 8630 steel are iron alloys. They have 56% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HI steel and the bottom bar is SAE-AISI 8630 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
160 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
12 to 24
Fatigue Strength, MPa 150
260 to 350
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 550
540 to 680
Tensile Strength: Yield (Proof), MPa 270
360 to 560

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 23
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
1.5
Embodied Energy, MJ/kg 59
20
Embodied Water, L/kg 200
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 52
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 180
340 to 840
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 20
19 to 24
Strength to Weight: Bending, points 19
19 to 22
Thermal Diffusivity, mm2/s 3.9
10
Thermal Shock Resistance, points 12
18 to 23

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.28 to 0.33
Chromium (Cr), % 26 to 30
0.4 to 0.6
Iron (Fe), % 46.9 to 59.8
96.8 to 97.9
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.25
Nickel (Ni), % 14 to 18
0.4 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.040