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SAE-AISI 4028 Steel vs. EN 1.4521 Stainless Steel

Both SAE-AISI 4028 steel and EN 1.4521 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 30 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 4028 steel and the bottom bar is EN 1.4521 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 14 to 23
23
Fatigue Strength, MPa 180 to 330
230
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 310 to 380
330
Tensile Strength: Ultimate (UTS), MPa 490 to 630
520
Tensile Strength: Yield (Proof), MPa 260 to 520
340

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
930
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 49
23
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.8
Embodied Energy, MJ/kg 19
39
Embodied Water, L/kg 47
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81 to 95
100
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 720
280
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 22
19
Strength to Weight: Bending, points 18 to 21
19
Thermal Diffusivity, mm2/s 13
6.2
Thermal Shock Resistance, points 16 to 20
18

Alloy Composition

Carbon (C), % 0.25 to 0.3
0 to 0.025
Chromium (Cr), % 0
17 to 20
Iron (Fe), % 98.1 to 98.7
74.6 to 81.1
Manganese (Mn), % 0.7 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
1.8 to 2.5
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0.035 to 0.050
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.8