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AWS E309Mo vs. ASTM Grade HN Steel

Both AWS E309Mo and ASTM grade HN steel are iron alloys. They have 87% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AWS E309Mo and the bottom bar is ASTM grade HN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
9.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 620
500

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1390
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 22
26
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.2
4.6
Embodied Energy, MJ/kg 59
66
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 32
22
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
17
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 3.9
3.5
Thermal Shock Resistance, points 15
11

Alloy Composition

Carbon (C), % 0 to 0.12
0.2 to 0.5
Chromium (Cr), % 22 to 25
19 to 23
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 53.6 to 63.5
44.9 to 57.8
Manganese (Mn), % 0.5 to 2.5
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.5
Nickel (Ni), % 12 to 14
23 to 27
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040