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ASTM A387 Grade 21 Steel vs. EN 1.4020 Stainless Steel

Both ASTM A387 grade 21 steel and EN 1.4020 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 1.4020 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
13 to 34
Fatigue Strength, MPa 160 to 250
340 to 540
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 310 to 370
510 to 680
Tensile Strength: Ultimate (UTS), MPa 500 to 590
770 to 1130
Tensile Strength: Yield (Proof), MPa 230 to 350
430 to 950

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 480
890
Melting Completion (Liquidus), °C 1470
1390
Melting Onset (Solidus), °C 1430
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
11
Density, g/cm3 7.9
7.6
Embodied Carbon, kg CO2/kg material 1.8
2.5
Embodied Energy, MJ/kg 23
37
Embodied Water, L/kg 62
150

Common Calculations

PREN (Pitting Resistance) 6.4
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
140 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
460 to 2290
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 21
28 to 41
Strength to Weight: Bending, points 18 to 20
25 to 32
Thermal Shock Resistance, points 14 to 17
16 to 23

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.15
Chromium (Cr), % 2.8 to 3.3
16.5 to 19
Iron (Fe), % 94.4 to 96
62.8 to 71.8
Manganese (Mn), % 0.3 to 0.6
11 to 14
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
0.5 to 2.5
Nitrogen (N), % 0
0.2 to 0.45
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030