AWS E630 vs. ASTM B780 Alloy

AWS E630 belongs to the iron alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. There are 16 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is AWS E630 and the bottom bar is ASTM B780 alloy.

AWS E630 (W37410) Weld Metal ASTM B780 Silver-Copper-Nickel Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		83

Elongation at Break, %		8.0
Elongation at Break, %		1.1 to 9.1

Poisson's Ratio		0.28
Poisson's Ratio		0.36

Shear Modulus, GPa		76
Shear Modulus, GPa		30

Tensile Strength: Ultimate (UTS), MPa		1040
Tensile Strength: Ultimate (UTS), MPa		330 to 590

Thermal Properties

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

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		270

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		2.3
Electrical Conductivity: Equal Volume, % IACS		70 to 76

Electrical Conductivity: Equal Weight (Specific), % IACS		2.6
Electrical Conductivity: Equal Weight (Specific), % IACS		62 to 68

Otherwise Unclassified Properties

Density, g/cm³		7.8
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		4.5

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		37
Strength to Weight: Axial, points		9.1 to 16

Strength to Weight: Bending, points		29
Strength to Weight: Bending, points		11 to 15

Thermal Shock Resistance, points		28
Thermal Shock Resistance, points		16 to 29

Alloy Composition

Cadmium (Cd), %		0
Cadmium (Cd), %		0 to 0.050

Carbon (C), %		0 to 0.050
Carbon (C), %		0

Chromium (Cr), %		16 to 16.8
Chromium (Cr), %		0

Copper (Cu), %		3.3 to 4.0
Copper (Cu), %		23.5 to 25.7

Iron (Fe), %		71.6 to 75.9
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0
Lead (Pb), %		0 to 0.030

Manganese (Mn), %		0.25 to 0.75
Manganese (Mn), %		0

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

Nickel (Ni), %		4.5 to 5.0
Nickel (Ni), %		0.35 to 0.65

Niobium (Nb), %		0.15 to 0.3
Niobium (Nb), %		0

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

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

Silver (Ag), %		0
Silver (Ag), %		74 to 76

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

Zinc (Zn), %		0
Zinc (Zn), %		0 to 0.060