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SAE-AISI H21 Steel vs. EN 1.4621 Stainless Steel

Both SAE-AISI H21 steel and EN 1.4621 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, 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 1.4621 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 720 to 1790
500

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Melting Completion (Liquidus), °C 1630
1440
Melting Onset (Solidus), °C 1580
1390
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 27
21
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 23
14
Density, g/cm3 8.5
7.7
Embodied Carbon, kg CO2/kg material 4.5
2.8
Embodied Energy, MJ/kg 68
41
Embodied Water, L/kg 72
140

Common Calculations

PREN (Pitting Resistance) 19
21
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 23 to 58
18
Strength to Weight: Bending, points 21 to 38
18
Thermal Diffusivity, mm2/s 7.1
5.7
Thermal Shock Resistance, points 24 to 59
17

Alloy Composition

Carbon (C), % 0.28 to 0.36
0 to 0.030
Chromium (Cr), % 3.0 to 3.8
20 to 21.5
Copper (Cu), % 0 to 0.25
0.1 to 1.0
Iron (Fe), % 87.6 to 93.8
74.4 to 79.7
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Nickel (Ni), % 0 to 0.3
0
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.040
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