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ASTM A387 Grade 91 Class 2 vs. EN 1.7767 Steel

Both ASTM A387 grade 91 class 2 and EN 1.7767 steel are iron alloys. They have a moderately high 94% 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 1.7767 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
20
Fatigue Strength, MPa 330
320 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
74
Shear Strength, MPa 420
420 to 430
Tensile Strength: Ultimate (UTS), MPa 670
670 to 690
Tensile Strength: Yield (Proof), MPa 470
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
480
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
4.5
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.6
2.4
Embodied Energy, MJ/kg 37
33
Embodied Water, L/kg 88
64

Common Calculations

PREN (Pitting Resistance) 13
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 580
570 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
24
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 6.9
11
Thermal Shock Resistance, points 19
19 to 20

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
2.8 to 3.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 87.3 to 90.3
93.8 to 95.8
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.85 to 1.1
0.9 to 1.1
Nickel (Ni), % 0 to 0.4
0 to 0.25
Niobium (Nb), % 0.060 to 0.1
0 to 0.070
Nitrogen (N), % 0.030 to 0.070
0 to 0.012
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 0.2 to 0.5
0 to 0.15
Sulfur (S), % 0 to 0.010
0 to 0.0050
Titanium (Ti), % 0 to 0.010
0 to 0.030
Vanadium (V), % 0.18 to 0.25
0.2 to 0.3
Zirconium (Zr), % 0 to 0.010
0