SAE-AISI H21 Steel vs. SAE-AISI H42 Steel
Both SAE-AISI H21 steel and SAE-AISI H42 steel are iron alloys. They have a moderately high 92% of their average alloy composition in common.
For each property being compared, the top bar is SAE-AISI H21 steel and the bottom bar is SAE-AISI H42 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
200 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 76 | |
77 |
Tensile Strength: Ultimate (UTS), MPa | 720 to 1790 | |
700 to 1980 |
Thermal Properties
Latent Heat of Fusion, J/g | 250 | |
260 |
Melting Completion (Liquidus), °C | 1630 | |
1620 |
Melting Onset (Solidus), °C | 1580 | |
1570 |
Specific Heat Capacity, J/kg-K | 440 | |
440 |
Thermal Conductivity, W/m-K | 27 | |
24 |
Thermal Expansion, µm/m-K | 11 | |
12 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 23 | |
24 |
Density, g/cm3 | 8.5 | |
8.4 |
Embodied Carbon, kg CO2/kg material | 4.5 | |
8.8 |
Embodied Energy, MJ/kg | 68 | |
130 |
Embodied Water, L/kg | 72 | |
98 |
Common Calculations
PREN (Pitting Resistance) | 19 | |
31 |
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 23 | |
23 |
Strength to Weight: Axial, points | 23 to 58 | |
23 to 65 |
Strength to Weight: Bending, points | 21 to 38 | |
21 to 42 |
Thermal Diffusivity, mm2/s | 7.1 | |
6.5 |
Thermal Shock Resistance, points | 24 to 59 | |
20 to 57 |
Alloy Composition
Carbon (C), % | 0.28 to 0.36 | |
0.55 to 0.7 |
Chromium (Cr), % | 3.0 to 3.8 | |
3.8 to 4.5 |
Copper (Cu), % | 0 to 0.25 | |
0 to 0.25 |
Iron (Fe), % | 87.6 to 93.8 | |
79.3 to 83.8 |
Manganese (Mn), % | 0.15 to 0.4 | |
0.15 to 0.4 |
Molybdenum (Mo), % | 0 | |
4.5 to 5.5 |
Nickel (Ni), % | 0 to 0.3 | |
0 to 0.3 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.030 |
Silicon (Si), % | 0.15 to 0.5 | |
0 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.030 |
Tungsten (W), % | 8.5 to 10 | |
5.5 to 6.8 |
Vanadium (V), % | 0.3 to 0.6 | |
1.8 to 2.2 |