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AWS E330H vs. AWS E309Mo

Both AWS E330H and AWS E309Mo are iron alloys. Both are furnished in the as-welded condition. They have 77% of their average alloy composition in common.

For each property being compared, the top bar is AWS E330H and the bottom bar is AWS E309Mo.

AWS E330H (W88335) Weld Metal AWS E309Mo (W30920) 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
Elongation at Break, %		34

Poisson's Ratio		0.29
Poisson's Ratio		0.28

Shear Modulus, GPa		76
Shear Modulus, GPa		79

Tensile Strength: Ultimate (UTS), MPa		690
Tensile Strength: Ultimate (UTS), MPa		620

Thermal Properties

Latent Heat of Fusion, J/g		290
Latent Heat of Fusion, J/g		300

Melting Completion (Liquidus), °C		1400
Melting Completion (Liquidus), °C		1430

Melting Onset (Solidus), °C		1350
Melting Onset (Solidus), °C		1390

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		480

Thermal Conductivity, W/m-K		12
Thermal Conductivity, W/m-K		15

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		1.7
Electrical Conductivity: Equal Volume, % IACS		2.1

Electrical Conductivity: Equal Weight (Specific), % IACS		1.9
Electrical Conductivity: Equal Weight (Specific), % IACS		2.4

Otherwise Unclassified Properties

Base Metal Price, % relative		30
Base Metal Price, % relative		22

Density, g/cm³		8.1
Density, g/cm³		7.9

Embodied Carbon, kg CO₂/kg material		5.4
Embodied Carbon, kg CO₂/kg material		4.2

Embodied Energy, MJ/kg		76
Embodied Energy, MJ/kg		59

Embodied Water, L/kg		180
Embodied Water, L/kg		180

Common Calculations

PREN (Pitting Resistance)		17
PREN (Pitting Resistance)		32

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

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

Strength to Weight: Axial, points		24
Strength to Weight: Axial, points		22

Strength to Weight: Bending, points		22
Strength to Weight: Bending, points		20

Thermal Diffusivity, mm²/s		3.2
Thermal Diffusivity, mm²/s		3.9

Thermal Shock Resistance, points		19
Thermal Shock Resistance, points		15

Alloy Composition

Carbon (C), %		0.35 to 0.45
Carbon (C), %		0 to 0.12

Chromium (Cr), %		14 to 17
Chromium (Cr), %		22 to 25

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

Iron (Fe), %		40.5 to 51.7
Iron (Fe), %		53.6 to 63.5

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

Molybdenum (Mo), %		0 to 0.75
Molybdenum (Mo), %		2.0 to 3.0

Nickel (Ni), %		33 to 37
Nickel (Ni), %		12 to 14

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

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

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