S17400 Stainless Steel vs. AWS BVAg-18

S17400 stainless steel belongs to the iron alloys classification, while AWS BVAg-18 belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (20, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is AWS BVAg-18.

UNS S17400 (17-4 PH, Alloy 630) Stainless Steel AWS BVAg-18 (P07607) Vacuum Service Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		82

Poisson's Ratio		0.28
Poisson's Ratio		0.36

Shear Modulus, GPa		75
Shear Modulus, GPa		30

Tensile Strength: Ultimate (UTS), MPa		910 to 1390
Tensile Strength: Ultimate (UTS), MPa		180

Thermal Properties

Latent Heat of Fusion, J/g		280
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		1440
Melting Completion (Liquidus), °C		720

Melting Onset (Solidus), °C		1400
Melting Onset (Solidus), °C		600

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		280

Thermal Expansion, µm/m-K		11
Thermal Expansion, µm/m-K		19

Otherwise Unclassified Properties

Density, g/cm³		7.8
Density, g/cm³		9.7

Embodied Carbon, kg CO₂/kg material		2.7
Embodied Carbon, kg CO₂/kg material		59

Embodied Energy, MJ/kg		39
Embodied Energy, MJ/kg		930

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		4.7

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		15

Strength to Weight: Axial, points		32 to 49
Strength to Weight: Axial, points		5.1

Strength to Weight: Bending, points		27 to 35
Strength to Weight: Bending, points		7.3

Thermal Shock Resistance, points		30 to 46
Thermal Shock Resistance, points		8.1

Alloy Composition

Cadmium (Cd), %		0
Cadmium (Cd), %		0 to 0.0010

Carbon (C), %		0 to 0.070
Carbon (C), %		0 to 0.0050

Chromium (Cr), %		15 to 17
Chromium (Cr), %		0

Copper (Cu), %		3.0 to 5.0
Copper (Cu), %		28.5 to 31.5

Iron (Fe), %		70.4 to 78.9
Iron (Fe), %		0

Lead (Pb), %		0
Lead (Pb), %		0 to 0.0020

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

Nickel (Ni), %		3.0 to 5.0
Nickel (Ni), %		0

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

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.0020

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

Silver (Ag), %		0
Silver (Ag), %		59 to 61

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

Tin (Sn), %		0
Tin (Sn), %		9.5 to 10.5

Zinc (Zn), %		0
Zinc (Zn), %		0 to 0.0010