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ASTM A387 Grade 21 Steel vs. EN 1.4864 Stainless Steel

Both ASTM A387 grade 21 steel and EN 1.4864 stainless steel are iron alloys. They have 50% 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 1.4864 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
33
Fatigue Strength, MPa 160 to 250
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
75
Shear Strength, MPa 310 to 370
430
Tensile Strength: Ultimate (UTS), MPa 500 to 590
650
Tensile Strength: Yield (Proof), MPa 230 to 350
260

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Maximum Temperature: Mechanical, °C 480
1100
Melting Completion (Liquidus), °C 1470
1390
Melting Onset (Solidus), °C 1430
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
13
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
30
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.8
5.3
Embodied Energy, MJ/kg 23
75
Embodied Water, L/kg 62
180

Common Calculations

PREN (Pitting Resistance) 6.4
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
170
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
170
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
23
Strength to Weight: Bending, points 18 to 20
21
Thermal Diffusivity, mm2/s 11
3.3
Thermal Shock Resistance, points 14 to 17
17

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.15
Chromium (Cr), % 2.8 to 3.3
15 to 17
Iron (Fe), % 94.4 to 96
41.7 to 51
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
33 to 37
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
1.0 to 2.0
Sulfur (S), % 0 to 0.025
0 to 0.015