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SAE-AISI H21 Steel vs. EN 1.4404 Stainless Steel

Both SAE-AISI H21 steel and EN 1.4404 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H21 steel and the bottom bar is EN 1.4404 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
600 to 900

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1630
1440
Melting Onset (Solidus), °C 1580
1400
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 27
15
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 23
19
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 4.5
3.8
Embodied Energy, MJ/kg 68
52
Embodied Water, L/kg 72
150

Common Calculations

PREN (Pitting Resistance) 19
26
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 23 to 58
21 to 32
Strength to Weight: Bending, points 21 to 38
20 to 26
Thermal Diffusivity, mm2/s 7.1
4.0
Thermal Shock Resistance, points 24 to 59
13 to 20

Alloy Composition

Carbon (C), % 0.28 to 0.36
0 to 0.030
Chromium (Cr), % 3.0 to 3.8
16.5 to 18.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87.6 to 93.8
62.8 to 71.5
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 0 to 0.3
10 to 13
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.15 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 8.5 to 10
0
Vanadium (V), % 0.3 to 0.6
0

Comparable Variants