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AISI 321 Stainless Steel vs. S45503 Stainless Steel

Both AISI 321 stainless steel and S45503 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 28 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 AISI 321 stainless steel and the bottom bar is S45503 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
410 to 500
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
4.6 to 6.8
Fatigue Strength, MPa 220 to 270
710 to 800
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 420 to 460
940 to 1070
Tensile Strength: Ultimate (UTS), MPa 590 to 690
1610 to 1850
Tensile Strength: Yield (Proof), MPa 220 to 350
1430 to 1700

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 480
640
Maximum Temperature: Mechanical, °C 870
760
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
11

Otherwise Unclassified Properties

Base Metal Price, % relative 16
15
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.2
3.4
Embodied Energy, MJ/kg 45
48
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 19
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
82 to 110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
57 to 65
Strength to Weight: Bending, points 20 to 22
39 to 43
Thermal Shock Resistance, points 13 to 15
56 to 64

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.010
Chromium (Cr), % 17 to 19
11 to 12.5
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 65.3 to 74
72.4 to 78.9
Manganese (Mn), % 0 to 2.0
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 9.0 to 12
7.5 to 9.5
Niobium (Nb), % 0
0.1 to 0.5
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.010
Silicon (Si), % 0 to 0.75
0 to 0.2
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0 to 0.7
1.0 to 1.4