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ASTM A387 Grade 21 Steel vs. EN 1.7767 Steel

Both ASTM A387 grade 21 steel and EN 1.7767 steel are iron alloys. Their average alloy composition is basically identical. 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 21 steel and the bottom bar is EN 1.7767 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
20
Fatigue Strength, MPa 160 to 250
320 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Shear Strength, MPa 310 to 370
420 to 430
Tensile Strength: Ultimate (UTS), MPa 500 to 590
670 to 690
Tensile Strength: Yield (Proof), MPa 230 to 350
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
480
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
4.5
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
2.4
Embodied Energy, MJ/kg 23
33
Embodied Water, L/kg 62
64

Common Calculations

PREN (Pitting Resistance) 6.4
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
570 to 650
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
24
Strength to Weight: Bending, points 18 to 20
22
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 14 to 17
19 to 20

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.1 to 0.15
Chromium (Cr), % 2.8 to 3.3
2.8 to 3.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 94.4 to 96
93.8 to 95.8
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.025
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.15
Sulfur (S), % 0 to 0.025
0 to 0.0050
Titanium (Ti), % 0
0 to 0.030
Vanadium (V), % 0
0.2 to 0.3

Comparable Variants