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AISI 309 Stainless Steel vs. AWS BAg-21

AISI 309 stainless steel belongs to the iron alloys classification, while AWS BAg-21 belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

For each property being compared, the top bar is AISI 309 stainless steel and the bottom bar is AWS BAg-21.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
85
Poisson's Ratio 0.27
0.36
Shear Modulus, GPa 78
31
Tensile Strength: Ultimate (UTS), MPa 600 to 710
150

Thermal Properties

Latent Heat of Fusion, J/g 290
140
Melting Completion (Liquidus), °C 1450
800
Melting Onset (Solidus), °C 1400
690
Specific Heat Capacity, J/kg-K 480
280
Thermal Expansion, µm/m-K 15
19

Otherwise Unclassified Properties

Density, g/cm3 7.8
9.8
Embodied Energy, MJ/kg 51
970

Common Calculations

Stiffness to Weight: Axial, points 14
4.8
Stiffness to Weight: Bending, points 25
15
Strength to Weight: Axial, points 21 to 25
4.2
Strength to Weight: Bending, points 20 to 23
6.4
Thermal Shock Resistance, points 14 to 16
6.6

Alloy Composition

Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 22 to 24
0
Copper (Cu), % 0
27.5 to 29.5
Iron (Fe), % 58 to 66
0
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 12 to 15
2.0 to 3.0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.75
0
Silver (Ag), % 0
62 to 64
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
5.0 to 7.0
Residuals, % 0
0 to 0.15