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ASTM A387 Grade 91 Class 2 vs. EN 1.5521 Steel

Both ASTM A387 grade 91 class 2 and EN 1.5521 steel are iron alloys. They have 90% of their average alloy composition in common. 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 1.5521 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
130 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
11 to 21
Fatigue Strength, MPa 330
210 to 310
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 420
310 to 360
Tensile Strength: Ultimate (UTS), MPa 670
430 to 1390
Tensile Strength: Yield (Proof), MPa 470
300 to 490

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
400
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
51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.4
Embodied Energy, MJ/kg 37
19
Embodied Water, L/kg 88
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
44 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 580
250 to 630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
15 to 49
Strength to Weight: Bending, points 22
16 to 35
Thermal Diffusivity, mm2/s 6.9
14
Thermal Shock Resistance, points 19
13 to 41

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.080 to 0.12
0.16 to 0.2
Chromium (Cr), % 8.0 to 9.5
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 87.3 to 90.3
98 to 98.9
Manganese (Mn), % 0.3 to 0.6
0.9 to 1.2
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.025
Silicon (Si), % 0.2 to 0.5
0 to 0.3
Sulfur (S), % 0 to 0.010
0 to 0.025
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0