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ASTM Grade HD Steel vs. AWS E309Nb

Both ASTM grade HD steel and AWS E309Nb are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HD steel and the bottom bar is AWS E309Nb.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 9.1
34
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 590
620

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Melting Completion (Liquidus), °C 1410
1420
Melting Onset (Solidus), °C 1370
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 11
14

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 17
25
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
4.4
Embodied Energy, MJ/kg 45
64
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 29
25
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 4.3
4.0
Thermal Shock Resistance, points 19
16

Alloy Composition

Carbon (C), % 0 to 0.5
0 to 0.12
Chromium (Cr), % 26 to 30
22 to 25
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 58.4 to 70
54.8 to 64.8
Manganese (Mn), % 0 to 1.5
0.5 to 2.5
Molybdenum (Mo), % 0 to 0.5
0 to 0.75
Nickel (Ni), % 4.0 to 7.0
12 to 14
Niobium (Nb), % 0
0.7 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030