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ASTM A387 Grade 91 Class 2 vs. EN 1.3555 Steel

Both ASTM A387 grade 91 class 2 and EN 1.3555 steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, 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 1.3555 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
75
Tensile Strength: Ultimate (UTS), MPa 670
770

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Maximum Temperature: Mechanical, °C 600
540
Melting Completion (Liquidus), °C 1460
1500
Melting Onset (Solidus), °C 1420
1450
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
9.3
Electrical Conductivity: Equal Weight (Specific), % IACS 10
11

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
11
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.6
5.6
Embodied Energy, MJ/kg 37
81
Embodied Water, L/kg 88
90

Common Calculations

PREN (Pitting Resistance) 13
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
27
Strength to Weight: Bending, points 22
23
Thermal Shock Resistance, points 19
22

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0.1 to 0.15
Chromium (Cr), % 8.0 to 9.5
3.9 to 4.3
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 87.3 to 90.3
85.4 to 87.7
Manganese (Mn), % 0.3 to 0.6
0.15 to 0.35
Molybdenum (Mo), % 0.85 to 1.1
4.0 to 4.5
Nickel (Ni), % 0 to 0.4
3.2 to 3.6
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 0.2 to 0.5
0.1 to 0.25
Sulfur (S), % 0 to 0.010
0 to 0.010
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0
0 to 0.15
Vanadium (V), % 0.18 to 0.25
1.0 to 1.3
Zirconium (Zr), % 0 to 0.010
0