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SAE-AISI 1021 Steel vs. EN 1.4125 Stainless Steel

Both SAE-AISI 1021 steel and EN 1.4125 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 31 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 SAE-AISI 1021 steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 27
19
Fatigue Strength, MPa 190 to 300
300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 310 to 320
500
Tensile Strength: Ultimate (UTS), MPa 480 to 530
800
Tensile Strength: Yield (Proof), MPa 260 to 450
470

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
870
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
15
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.3
Embodied Energy, MJ/kg 18
32
Embodied Water, L/kg 46
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
130
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
570
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 19
29
Strength to Weight: Bending, points 17 to 18
25
Thermal Diffusivity, mm2/s 14
4.1
Thermal Shock Resistance, points 15 to 17
29

Alloy Composition

Carbon (C), % 0.18 to 0.23
1.0 to 1.2
Chromium (Cr), % 0
16 to 18
Iron (Fe), % 98.8 to 99.22
78 to 82.7
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.8
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.015