AWS ERTi-7 vs. AWS E312

AWS ERTi-7 belongs to the titanium alloys classification, while AWS E312 belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is AWS ERTi-7 and the bottom bar is AWS E312.

AWS ERTi-7 Weld Metal AWS E312 (W31310) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		200

Elongation at Break, %		20
Elongation at Break, %		25

Poisson's Ratio		0.32
Poisson's Ratio		0.27

Shear Modulus, GPa		40
Shear Modulus, GPa		80

Tensile Strength: Ultimate (UTS), MPa		340
Tensile Strength: Ultimate (UTS), MPa		740

Thermal Properties

Latent Heat of Fusion, J/g		420
Latent Heat of Fusion, J/g		310

Melting Completion (Liquidus), °C		1670
Melting Completion (Liquidus), °C		1410

Melting Onset (Solidus), °C		1620
Melting Onset (Solidus), °C		1360

Specific Heat Capacity, J/kg-K		540
Specific Heat Capacity, J/kg-K		480

Thermal Expansion, µm/m-K		8.7
Thermal Expansion, µm/m-K		15

Otherwise Unclassified Properties

Density, g/cm³		4.5
Density, g/cm³		7.7

Embodied Carbon, kg CO₂/kg material		47
Embodied Carbon, kg CO₂/kg material		3.6

Embodied Energy, MJ/kg		800
Embodied Energy, MJ/kg		52

Embodied Water, L/kg		470
Embodied Water, L/kg		200

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		15

Stiffness to Weight: Bending, points		35
Stiffness to Weight: Bending, points		25

Strength to Weight: Axial, points		21
Strength to Weight: Axial, points		27

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

Thermal Shock Resistance, points		26
Thermal Shock Resistance, points		18

Alloy Composition

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

Chromium (Cr), %		0
Chromium (Cr), %		28 to 32

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

Hydrogen (H), %		0 to 0.0080
Hydrogen (H), %		0

Iron (Fe), %		0 to 0.12
Iron (Fe), %		52.3 to 63.5

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

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

Nickel (Ni), %		0
Nickel (Ni), %		8.0 to 10.5

Nitrogen (N), %		0 to 0.015
Nitrogen (N), %		0

Oxygen (O), %		0.080 to 0.16
Oxygen (O), %		0

Palladium (Pd), %		0.12 to 0.25
Palladium (Pd), %		0

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

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

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

Titanium (Ti), %		99.417 to 99.8
Titanium (Ti), %		0