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ASTM A387 Grade 91 Class 2 vs. EN 1.8505 Steel

Both ASTM A387 grade 91 class 2 and EN 1.8505 steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, 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 1.8505 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
320
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
13
Fatigue Strength, MPa 330
540
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 420
630
Tensile Strength: Ultimate (UTS), MPa 670
1050
Tensile Strength: Yield (Proof), MPa 470
860

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.6
Embodied Energy, MJ/kg 37
22
Embodied Water, L/kg 88
65

Common Calculations

PREN (Pitting Resistance) 13
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 580
1950
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
37
Strength to Weight: Bending, points 22
30
Thermal Diffusivity, mm2/s 6.9
11
Thermal Shock Resistance, points 19
31

Alloy Composition

Aluminum (Al), % 0 to 0.020
0.8 to 1.2
Carbon (C), % 0.080 to 0.12
0.28 to 0.35
Chromium (Cr), % 8.0 to 9.5
1.5 to 1.8
Iron (Fe), % 87.3 to 90.3
95.4 to 97.1
Manganese (Mn), % 0.3 to 0.6
0.4 to 0.7
Molybdenum (Mo), % 0.85 to 1.1
0.2 to 0.4
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 0.4
Sulfur (S), % 0 to 0.010
0 to 0.035
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0