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AISI 305 Stainless Steel vs. S21640 Stainless Steel

Both AISI 305 stainless steel and S21640 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 305 stainless steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 220
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34 to 45
46
Fatigue Strength, MPa 210 to 280
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 400 to 470
520
Tensile Strength: Ultimate (UTS), MPa 580 to 710
740
Tensile Strength: Yield (Proof), MPa 230 to 350
350

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
490
Maximum Temperature: Mechanical, °C 540
940
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 16
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.2
3.6
Embodied Energy, MJ/kg 45
51
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 18
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 210
280
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 320
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20 to 25
27
Strength to Weight: Bending, points 20 to 23
23
Thermal Diffusivity, mm2/s 4.2
4.0
Thermal Shock Resistance, points 13 to 15
16

Alloy Composition

Carbon (C), % 0 to 0.12
0 to 0.080
Chromium (Cr), % 17 to 19
17.5 to 19.5
Iron (Fe), % 65.1 to 72.5
63 to 74.3
Manganese (Mn), % 0 to 2.0
3.5 to 6.5
Molybdenum (Mo), % 0
0.5 to 2.0
Nickel (Ni), % 10.5 to 13
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030