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ASTM A387 Grade 21 Steel vs. EN 1.4594 Stainless Steel

Both ASTM A387 grade 21 steel and EN 1.4594 stainless steel are iron alloys. They have 81% 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 1.4594 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
490 to 620
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
76
Shear Strength, MPa 310 to 370
620 to 700
Tensile Strength: Ultimate (UTS), MPa 500 to 590
1020 to 1170
Tensile Strength: Yield (Proof), MPa 230 to 350
810 to 1140

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 480
820
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
16
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
15
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.8
3.2
Embodied Energy, MJ/kg 23
45
Embodied Water, L/kg 62
130

Common Calculations

PREN (Pitting Resistance) 6.4
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
110 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
1660 to 3320
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 21
36 to 41
Strength to Weight: Bending, points 18 to 20
29 to 31
Thermal Diffusivity, mm2/s 11
4.4
Thermal Shock Resistance, points 14 to 17
34 to 39

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.070
Chromium (Cr), % 2.8 to 3.3
13 to 15
Copper (Cu), % 0
1.2 to 2.0
Iron (Fe), % 94.4 to 96
72.6 to 79.5
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
1.2 to 2.0
Nickel (Ni), % 0
5.0 to 6.0
Niobium (Nb), % 0
0.15 to 0.6
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.7
Sulfur (S), % 0 to 0.025
0 to 0.015