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EN 1.1172 Steel vs. ASTM A387 Grade 9 Steel

Both EN 1.1172 steel and ASTM A387 grade 9 steel are iron alloys. They have 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 (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.1172 steel and the bottom bar is ASTM A387 grade 9 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 170
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Tensile Strength: Ultimate (UTS), MPa 480 to 1720
500 to 600

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
600
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
26
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
10

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.1
Embodied Energy, MJ/kg 18
28
Embodied Water, L/kg 46
87

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 61
18 to 21
Strength to Weight: Bending, points 17 to 41
18 to 20
Thermal Diffusivity, mm2/s 14
6.9
Thermal Shock Resistance, points 15 to 55
14 to 17

Alloy Composition

Carbon (C), % 0.32 to 0.39
0 to 0.15
Chromium (Cr), % 0
8.0 to 10
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 98.2 to 99.18
87.1 to 90.8
Manganese (Mn), % 0.5 to 0.8
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.3
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.025
Vanadium (V), % 0
0 to 0.040