S21603 Stainless Steel vs. AWS E309

Both S21603 stainless steel and AWS E309 are iron alloys. They have 89% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is S21603 stainless steel and the bottom bar is AWS E309.

UNS S21603 (XM-18) Stainless Steel AWS E309 (W30910) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		200

Elongation at Break, %		45
Elongation at Break, %		34

Poisson's Ratio		0.28
Poisson's Ratio		0.27

Shear Modulus, GPa		79
Shear Modulus, GPa		78

Tensile Strength: Ultimate (UTS), MPa		690
Tensile Strength: Ultimate (UTS), MPa		620

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		1420
Melting Completion (Liquidus), °C		1410

Melting Onset (Solidus), °C		1380
Melting Onset (Solidus), °C		1370

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		14

Otherwise Unclassified Properties

Base Metal Price, % relative		17
Base Metal Price, % relative		20

Density, g/cm³		7.7
Density, g/cm³		7.8

Embodied Carbon, kg CO₂/kg material		3.6
Embodied Carbon, kg CO₂/kg material		3.7

Embodied Energy, MJ/kg		50
Embodied Energy, MJ/kg		52

Embodied Water, L/kg		160
Embodied Water, L/kg		180

Common Calculations

PREN (Pitting Resistance)		34
PREN (Pitting Resistance)		25

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		14

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		25
Strength to Weight: Axial, points		22

Strength to Weight: Bending, points		22
Strength to Weight: Bending, points		21

Thermal Shock Resistance, points		15
Thermal Shock Resistance, points		16

Alloy Composition

Carbon (C), %		0 to 0.030
Carbon (C), %		0 to 0.15

Chromium (Cr), %		17.5 to 22
Chromium (Cr), %		22 to 25

Copper (Cu), %		0
Copper (Cu), %		0 to 0.75

Iron (Fe), %		57.6 to 67.8
Iron (Fe), %		55.8 to 65.5

Manganese (Mn), %		7.5 to 9.0
Manganese (Mn), %		0.5 to 2.5

Molybdenum (Mo), %		2.0 to 3.0
Molybdenum (Mo), %		0 to 0.75

Nickel (Ni), %		5.0 to 7.0
Nickel (Ni), %		12 to 14

Nitrogen (N), %		0.25 to 0.5
Nitrogen (N), %		0

Phosphorus (P), %		0 to 0.045
Phosphorus (P), %		0 to 0.040

Silicon (Si), %		0 to 0.75
Silicon (Si), %		0 to 1.0

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.030