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EN 1.4021 Stainless Steel vs. SAE-AISI 1008 Steel

Both EN 1.4021 stainless steel and SAE-AISI 1008 steel are iron alloys. They have 86% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4021 stainless steel and the bottom bar is SAE-AISI 1008 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
22 to 33
Fatigue Strength, MPa 240 to 380
150 to 220
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 390 to 530
220 to 230
Tensile Strength: Ultimate (UTS), MPa 630 to 880
330 to 370
Tensile Strength: Yield (Proof), MPa 390 to 670
190 to 310

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 760
400
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
62
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
7.9

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
1.8
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 1.9
1.4
Embodied Energy, MJ/kg 27
18
Embodied Water, L/kg 100
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 110
78 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1160
92 to 260
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23 to 31
12 to 13
Strength to Weight: Bending, points 21 to 26
13 to 15
Thermal Diffusivity, mm2/s 8.1
17
Thermal Shock Resistance, points 22 to 31
10 to 12

Alloy Composition

Carbon (C), % 0.16 to 0.25
0 to 0.1
Chromium (Cr), % 12 to 14
0
Iron (Fe), % 83.2 to 87.8
99.31 to 99.7
Manganese (Mn), % 0 to 1.5
0.3 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0 to 0.050