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AISI 316L Stainless Steel vs. S21640 Stainless Steel

Both AISI 316L stainless steel and S21640 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 33 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 AISI 316L stainless steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 350
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.0 to 50
46
Fatigue Strength, MPa 170 to 450
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
78
Shear Strength, MPa 370 to 690
520
Tensile Strength: Ultimate (UTS), MPa 530 to 1160
740
Tensile Strength: Yield (Proof), MPa 190 to 870
350

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
490
Maximum Temperature: Mechanical, °C 870
940
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 19
17
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.9
3.6
Embodied Energy, MJ/kg 53
51
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 26
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 230
280
Resilience: Unit (Modulus of Resilience), kJ/m3 93 to 1880
300
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19 to 41
27
Strength to Weight: Bending, points 18 to 31
23
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 12 to 25
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 16 to 18
17.5 to 19.5
Iron (Fe), % 62 to 72
63 to 74.3
Manganese (Mn), % 0 to 2.0
3.5 to 6.5
Molybdenum (Mo), % 2.0 to 3.0
0.5 to 2.0
Nickel (Ni), % 10 to 14
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0 to 0.1
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