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ASTM A387 Grade 21 Steel vs. EN 1.4306 Stainless Steel

Both ASTM A387 grade 21 steel and EN 1.4306 stainless steel are iron alloys. They have 72% 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 1.4306 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
190 to 270
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
14 to 45
Fatigue Strength, MPa 160 to 250
190 to 330
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 310 to 370
400 to 550
Tensile Strength: Ultimate (UTS), MPa 500 to 590
580 to 900
Tensile Strength: Yield (Proof), MPa 230 to 350
210 to 570

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 480
960
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
3.2
Embodied Energy, MJ/kg 23
45
Embodied Water, L/kg 62
150

Common Calculations

PREN (Pitting Resistance) 6.4
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
110 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
110 to 820
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 21
21 to 32
Strength to Weight: Bending, points 18 to 20
20 to 27
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 14 to 17
13 to 20

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 2.8 to 3.3
18 to 20
Iron (Fe), % 94.4 to 96
64.8 to 72
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
10 to 12
Nitrogen (N), % 0
0 to 0.1
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 0.015

Comparable Variants