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AWS E309H vs. AWS ER70S-A1

Both AWS E309H and AWS ER70S-A1 are iron alloys. They have 63% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AWS E309H and the bottom bar is AWS ER70S-A1.

AWS E309H Weld Metal AWS ER70S-A1 or ER49S-A1 (K11235) Weld Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		200
Elastic (Young's, Tensile) Modulus, GPa		190

Elongation at Break, %		34
Elongation at Break, %		22

Poisson's Ratio		0.27
Poisson's Ratio		0.29

Shear Modulus, GPa		78
Shear Modulus, GPa		73

Tensile Strength: Ultimate (UTS), MPa		620
Tensile Strength: Ultimate (UTS), MPa		590

Thermal Properties

Latent Heat of Fusion, J/g		300
Latent Heat of Fusion, J/g		260

Melting Completion (Liquidus), °C		1410
Melting Completion (Liquidus), °C		1460

Melting Onset (Solidus), °C		1370
Melting Onset (Solidus), °C		1420

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

Thermal Conductivity, W/m-K		15
Thermal Conductivity, W/m-K		50

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		2.1
Electrical Conductivity: Equal Volume, % IACS		7.2

Electrical Conductivity: Equal Weight (Specific), % IACS		2.5
Electrical Conductivity: Equal Weight (Specific), % IACS		8.3

Otherwise Unclassified Properties

Base Metal Price, % relative		20
Base Metal Price, % relative		2.5

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

Embodied Carbon, kg CO₂/kg material		3.7
Embodied Carbon, kg CO₂/kg material		1.5

Embodied Energy, MJ/kg		52
Embodied Energy, MJ/kg		20

Embodied Water, L/kg		180
Embodied Water, L/kg		48

Common Calculations

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

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

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		21

Strength to Weight: Bending, points		21
Strength to Weight: Bending, points		20

Thermal Diffusivity, mm²/s		4.0
Thermal Diffusivity, mm²/s		14

Thermal Shock Resistance, points		16
Thermal Shock Resistance, points		17

Alloy Composition

Carbon (C), %		0.040 to 0.15
Carbon (C), %		0 to 0.12

Chromium (Cr), %		22 to 25
Chromium (Cr), %		0

Copper (Cu), %		0 to 0.75
Copper (Cu), %		0 to 0.35

Iron (Fe), %		55.8 to 65.5
Iron (Fe), %		96.1 to 99.3

Manganese (Mn), %		0.5 to 2.5
Manganese (Mn), %		0 to 1.3

Molybdenum (Mo), %		0 to 0.75
Molybdenum (Mo), %		0.4 to 0.65

Nickel (Ni), %		12 to 14
Nickel (Ni), %		0 to 0.2

Phosphorus (P), %		0 to 0.040
Phosphorus (P), %		0 to 0.025

Silicon (Si), %		0 to 1.0
Silicon (Si), %		0.3 to 0.7

Sulfur (S), %		0 to 0.030
Sulfur (S), %		0 to 0.025

Residuals, %		0
Residuals, %		0 to 0.5