S17400 Stainless Steel vs. AWS E320

Both S17400 stainless steel and AWS E320 are iron alloys. They have 62% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is AWS E320.

UNS S17400 (17-4 PH, Alloy 630) Stainless Steel AWS E320 (W88021) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		200

Elongation at Break, %		11 to 21
Elongation at Break, %		34

Poisson's Ratio		0.28
Poisson's Ratio		0.28

Shear Modulus, GPa		75
Shear Modulus, GPa		77

Tensile Strength: Ultimate (UTS), MPa		910 to 1390
Tensile Strength: Ultimate (UTS), MPa		620

Thermal Properties

Latent Heat of Fusion, J/g		280
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		1440
Melting Completion (Liquidus), °C		1410

Melting Onset (Solidus), °C		1400
Melting Onset (Solidus), °C		1360

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		460

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		14

Otherwise Unclassified Properties

Base Metal Price, % relative		14
Base Metal Price, % relative		38

Density, g/cm³		7.8
Density, g/cm³		8.2

Embodied Carbon, kg CO₂/kg material		2.7
Embodied Carbon, kg CO₂/kg material		6.5

Embodied Energy, MJ/kg		39
Embodied Energy, MJ/kg		91

Embodied Water, L/kg		130
Embodied Water, L/kg		220

Common Calculations

PREN (Pitting Resistance)		16
PREN (Pitting Resistance)		28

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		13

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		32 to 49
Strength to Weight: Axial, points		21

Strength to Weight: Bending, points		27 to 35
Strength to Weight: Bending, points		20

Thermal Shock Resistance, points		30 to 46
Thermal Shock Resistance, points		16

Alloy Composition

Carbon (C), %		0 to 0.070
Carbon (C), %		0 to 0.070

Chromium (Cr), %		15 to 17
Chromium (Cr), %		19 to 21

Copper (Cu), %		3.0 to 5.0
Copper (Cu), %		3.0 to 4.0

Iron (Fe), %		70.4 to 78.9
Iron (Fe), %		31.8 to 43.5

Manganese (Mn), %		0 to 1.0
Manganese (Mn), %		0.5 to 2.5

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

Nickel (Ni), %		3.0 to 5.0
Nickel (Ni), %		32 to 36

Niobium (Nb), %		0.15 to 0.45
Niobium (Nb), %		0 to 1.0

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

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0 to 0.6

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