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ASTM A387 Grade 21 Steel vs. EN 1.4419 Stainless Steel

Both ASTM A387 grade 21 steel and EN 1.4419 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 1.4419 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
11 to 17
Fatigue Strength, MPa 160 to 250
230 to 680
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Shear Strength, MPa 310 to 370
410 to 950
Tensile Strength: Ultimate (UTS), MPa 500 to 590
660 to 1590
Tensile Strength: Yield (Proof), MPa 230 to 350
370 to 1240

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 480
790
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
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
8.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.8
2.2
Embodied Energy, MJ/kg 23
30
Embodied Water, L/kg 62
110

Common Calculations

PREN (Pitting Resistance) 6.4
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
95 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
350 to 3920
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 21
24 to 57
Strength to Weight: Bending, points 18 to 20
22 to 39
Thermal Diffusivity, mm2/s 11
8.1
Thermal Shock Resistance, points 14 to 17
23 to 55

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.36 to 0.42
Chromium (Cr), % 2.8 to 3.3
13 to 14.5
Iron (Fe), % 94.4 to 96
82 to 86
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0.6 to 1.0
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 to 0.015

Comparable Variants