AWS E33-31 vs. AWS ENiCu-7

AWS E33-31 belongs to the iron alloys classification, while AWS ENiCu-7 belongs to the nickel alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AWS E33-31 and the bottom bar is AWS ENiCu-7.

AWS E33-31 (W33310) Weld Metal AWS ENiCu-7 (W84190) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		210
Elastic (Young's, Tensile) Modulus, GPa		160

Elongation at Break, %		29
Elongation at Break, %		34

Poisson's Ratio		0.27
Poisson's Ratio		0.32

Shear Modulus, GPa		81
Shear Modulus, GPa		62

Tensile Strength: Ultimate (UTS), MPa		810
Tensile Strength: Ultimate (UTS), MPa		550

Thermal Properties

Latent Heat of Fusion, J/g		320
Latent Heat of Fusion, J/g		280

Melting Completion (Liquidus), °C		1380
Melting Completion (Liquidus), °C		1270

Melting Onset (Solidus), °C		1330
Melting Onset (Solidus), °C		1230

Specific Heat Capacity, J/kg-K		480
Specific Heat Capacity, J/kg-K		430

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		13

Otherwise Unclassified Properties

Base Metal Price, % relative		36
Base Metal Price, % relative		50

Density, g/cm³		7.9
Density, g/cm³		8.7

Embodied Carbon, kg CO₂/kg material		6.0
Embodied Carbon, kg CO₂/kg material		8.0

Embodied Energy, MJ/kg		86
Embodied Energy, MJ/kg		110

Embodied Water, L/kg		260
Embodied Water, L/kg		250

Common Calculations

Stiffness to Weight: Axial, points		14
Stiffness to Weight: Axial, points		10

Stiffness to Weight: Bending, points		25
Stiffness to Weight: Bending, points		21

Strength to Weight: Axial, points		28
Strength to Weight: Axial, points		17

Strength to Weight: Bending, points		24
Strength to Weight: Bending, points		17

Thermal Shock Resistance, points		19
Thermal Shock Resistance, points		18

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.75

Carbon (C), %		0 to 0.030
Carbon (C), %		0 to 0.1

Chromium (Cr), %		31 to 35
Chromium (Cr), %		0

Copper (Cu), %		0.4 to 0.8
Copper (Cu), %		20.6 to 38

Iron (Fe), %		24.7 to 34.8
Iron (Fe), %		0 to 2.5

Manganese (Mn), %		2.5 to 4.0
Manganese (Mn), %		0 to 4.0

Molybdenum (Mo), %		1.0 to 2.0
Molybdenum (Mo), %		0

Nickel (Ni), %		30 to 32
Nickel (Ni), %		62 to 69

Nitrogen (N), %		0.3 to 0.5
Nitrogen (N), %		0

Phosphorus (P), %		0 to 0.020
Phosphorus (P), %		0 to 0.020

Silicon (Si), %		0 to 0.9
Silicon (Si), %		0 to 1.5

Sulfur (S), %		0 to 0.010
Sulfur (S), %		0 to 0.015

Titanium (Ti), %		0
Titanium (Ti), %		0 to 1.0

Residuals, %		0
Residuals, %		0 to 0.5