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AWS E309LMo vs. AWS E2595

Both AWS E309LMo and AWS E2595 are iron alloys. Both are furnished in the as-welded condition. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is AWS E309LMo and the bottom bar is AWS E2595.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
17
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 79
80
Tensile Strength: Ultimate (UTS), MPa 580
850

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 22
23
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.2
4.4
Embodied Energy, MJ/kg 59
61
Embodied Water, L/kg 180
190

Common Calculations

PREN (Pitting Resistance) 32
42
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
30
Strength to Weight: Bending, points 20
25
Thermal Diffusivity, mm2/s 3.9
4.2
Thermal Shock Resistance, points 15
21

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.040
Chromium (Cr), % 22 to 25
24 to 27
Copper (Cu), % 0 to 0.75
0.4 to 1.5
Iron (Fe), % 53.6 to 63.5
51.4 to 64.5
Manganese (Mn), % 0.5 to 2.5
0 to 2.5
Molybdenum (Mo), % 2.0 to 3.0
2.5 to 4.5
Nickel (Ni), % 12 to 14
8.0 to 10.5
Nitrogen (N), % 0
0.2 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.2
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 0
0.4 to 1.0