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ASTM A387 Grade 21 Steel vs. EN 1.4005 Stainless Steel

Both ASTM A387 grade 21 steel and EN 1.4005 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 1.4005 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
13 to 21
Fatigue Strength, MPa 160 to 250
240 to 290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Shear Strength, MPa 310 to 370
390 to 450
Tensile Strength: Ultimate (UTS), MPa 500 to 590
630 to 750
Tensile Strength: Yield (Proof), MPa 230 to 350
370 to 500

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 480
760
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
30
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
7.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.8
2.0
Embodied Energy, MJ/kg 23
28
Embodied Water, L/kg 62
100

Common Calculations

PREN (Pitting Resistance) 6.4
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
90 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
350 to 650
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 21
23 to 27
Strength to Weight: Bending, points 18 to 20
21 to 24
Thermal Diffusivity, mm2/s 11
8.1
Thermal Shock Resistance, points 14 to 17
23 to 27

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.060 to 0.15
Chromium (Cr), % 2.8 to 3.3
12 to 14
Iron (Fe), % 94.4 to 96
82.4 to 87.8
Manganese (Mn), % 0.3 to 0.6
0 to 1.5
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.6
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0.15 to 0.35

Comparable Variants