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ASTM A387 Grade 21 Steel vs. EN 1.7335 Steel

Both ASTM A387 grade 21 steel and EN 1.7335 steel are iron alloys. They have a very high 97% 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 21 steel and the bottom bar is EN 1.7335 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
150 to 160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
21 to 22
Fatigue Strength, MPa 160 to 250
200 to 220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 310 to 370
310 to 330
Tensile Strength: Ultimate (UTS), MPa 500 to 590
500 to 520
Tensile Strength: Yield (Proof), MPa 230 to 350
280 to 310

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 480
430
Melting Completion (Liquidus), °C 1470
1470
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
44
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
2.8
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
1.6
Embodied Energy, MJ/kg 23
21
Embodied Water, L/kg 62
52

Common Calculations

PREN (Pitting Resistance) 6.4
2.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
91 to 97
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
210 to 260
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
18
Strength to Weight: Bending, points 18 to 20
18
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 14 to 17
15

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.080 to 0.18
Chromium (Cr), % 2.8 to 3.3
0.7 to 1.2
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 94.4 to 96
96.4 to 98.4
Manganese (Mn), % 0.3 to 0.6
0.4 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0.4 to 0.6
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.010

Comparable Variants