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S28200 Stainless Steel vs. SAE-AISI 4718 Steel

Both S28200 stainless steel and SAE-AISI 4718 steel are iron alloys. Both are furnished in the annealed condition. They have 63% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S28200 stainless steel and the bottom bar is SAE-AISI 4718 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 45
24
Fatigue Strength, MPa 430
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 610
330
Tensile Strength: Ultimate (UTS), MPa 870
510
Tensile Strength: Yield (Proof), MPa 460
370

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 900
420
Melting Completion (Liquidus), °C 1380
1460
Melting Onset (Solidus), °C 1330
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 18
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
3.0
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.6
Embodied Energy, MJ/kg 41
21
Embodied Water, L/kg 160
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 330
110
Resilience: Unit (Modulus of Resilience), kJ/m3 540
360
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 32
18
Strength to Weight: Bending, points 27
18
Thermal Shock Resistance, points 17
17

Alloy Composition

Carbon (C), % 0 to 0.15
0.16 to 0.21
Chromium (Cr), % 17 to 19
0.35 to 0.55
Copper (Cu), % 0.75 to 1.3
0
Iron (Fe), % 57.7 to 64.1
96.3 to 97.4
Manganese (Mn), % 17 to 19
0.7 to 0.9
Molybdenum (Mo), % 0.75 to 1.3
0.3 to 0.4
Nickel (Ni), % 0
0.9 to 1.2
Nitrogen (N), % 0.4 to 0.6
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 to 0.040