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ASTM Grade HK Steel vs. SAE-AISI 4130 Steel

Both ASTM grade HK steel and SAE-AISI 4130 steel are iron alloys. They have 54% 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 HK steel and the bottom bar is SAE-AISI 4130 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
200 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
13 to 26
Fatigue Strength, MPa 150
320 to 660
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 500
530 to 1040
Tensile Strength: Yield (Proof), MPa 270
440 to 980

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
43
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 25
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.4
1.5
Embodied Energy, MJ/kg 63
20
Embodied Water, L/kg 200
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
83 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 190
500 to 2550
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
19 to 37
Strength to Weight: Bending, points 18
19 to 29
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 11
16 to 31

Alloy Composition

Carbon (C), % 0.2 to 0.6
0.28 to 0.33
Chromium (Cr), % 24 to 28
0.8 to 1.1
Iron (Fe), % 44.8 to 57.8
97.3 to 98.2
Manganese (Mn), % 0 to 2.0
0.4 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.25
Nickel (Ni), % 18 to 22
0
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