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ASTM Grade HP Steel vs. SAE-AISI 4028 Steel

Both ASTM grade HP steel and SAE-AISI 4028 steel are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HP steel and the bottom bar is SAE-AISI 4028 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
150 to 190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 5.1
14 to 23
Fatigue Strength, MPa 130
180 to 330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 490
490 to 630
Tensile Strength: Yield (Proof), MPa 260
260 to 520

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1370
1460
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 12
49
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 34
2.1
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 5.8
1.5
Embodied Energy, MJ/kg 82
19
Embodied Water, L/kg 220
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
81 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 170
180 to 720
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
17 to 22
Strength to Weight: Bending, points 17
18 to 21
Thermal Diffusivity, mm2/s 3.2
13
Thermal Shock Resistance, points 11
16 to 20

Alloy Composition

Carbon (C), % 0.35 to 0.75
0.25 to 0.3
Chromium (Cr), % 24 to 28
0
Iron (Fe), % 29.2 to 42.7
98.1 to 98.7
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Molybdenum (Mo), % 0 to 0.5
0.2 to 0.3
Nickel (Ni), % 33 to 37
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.5
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0.035 to 0.050