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S21904 Stainless Steel vs. SAE-AISI 4028 Steel

Both S21904 stainless steel and SAE-AISI 4028 steel are iron alloys. They have 65% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S21904 stainless steel and the bottom bar is SAE-AISI 4028 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
150 to 190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
14 to 23
Fatigue Strength, MPa 380 to 550
180 to 330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 510 to 620
310 to 380
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
490 to 630
Tensile Strength: Yield (Proof), MPa 390 to 910
260 to 520

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
400
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
49
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.5
Embodied Energy, MJ/kg 43
19
Embodied Water, L/kg 160
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
81 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
180 to 720
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
17 to 22
Strength to Weight: Bending, points 23 to 29
18 to 21
Thermal Diffusivity, mm2/s 3.8
13
Thermal Shock Resistance, points 15 to 21
16 to 20

Alloy Composition

Carbon (C), % 0 to 0.040
0.25 to 0.3
Chromium (Cr), % 19 to 21.5
0
Iron (Fe), % 59.5 to 67.4
98.1 to 98.7
Manganese (Mn), % 8.0 to 10
0.7 to 0.9
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 5.5 to 7.5
0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0.035 to 0.050

Comparable Variants