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AWS E316H vs. AWS E318

Both AWS E316H and AWS E318 are iron alloys. Both are furnished in the as-welded condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is AWS E316H and the bottom bar is AWS E318.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
29
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 580
620

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 20
23
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.0
4.4
Embodied Energy, MJ/kg 55
62
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 27
27
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 15
16

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.080
Chromium (Cr), % 17 to 20
17 to 20
Copper (Cu), % 0 to 0.75
0 to 0.75
Iron (Fe), % 58.6 to 69.5
57.6 to 69.5
Manganese (Mn), % 0.5 to 2.5
0.5 to 2.5
Molybdenum (Mo), % 2.0 to 3.0
2.0 to 3.0
Nickel (Ni), % 11 to 14
11 to 14
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030