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ASTM A387 Grade 91 Class 2 vs. EN 1.7367 Steel

Both ASTM A387 grade 91 class 2 and EN 1.7367 steel are iron alloys. Both are furnished in the normalized and tempered condition. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is EN 1.7367 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
18
Fatigue Strength, MPa 330
310
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
75
Tensile Strength: Ultimate (UTS), MPa 670
670
Tensile Strength: Yield (Proof), MPa 470
460

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 10
10

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
7.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
2.6
Embodied Energy, MJ/kg 37
37
Embodied Water, L/kg 88
88

Common Calculations

PREN (Pitting Resistance) 13
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 580
560
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
24
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 6.9
6.9
Thermal Shock Resistance, points 19
19

Alloy Composition

Aluminum (Al), % 0 to 0.020
0 to 0.020
Carbon (C), % 0.080 to 0.12
0.080 to 0.12
Chromium (Cr), % 8.0 to 9.5
8.0 to 9.5
Iron (Fe), % 87.3 to 90.3
87.3 to 90.3
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.85 to 1.1
0.85 to 1.1
Nickel (Ni), % 0 to 0.4
0 to 0.4
Niobium (Nb), % 0.060 to 0.1
0.060 to 0.1
Nitrogen (N), % 0.030 to 0.070
0.030 to 0.070
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0.2 to 0.5
0.2 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0 to 0.010
0 to 0.010
Vanadium (V), % 0.18 to 0.25
0.18 to 0.25
Zirconium (Zr), % 0 to 0.010
0 to 0.010