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ASTM A387 Grade 21L Class 1 vs. EN 1.4588 Stainless Steel

Both ASTM A387 grade 21L class 1 and EN 1.4588 stainless steel are iron alloys. They have 51% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21L class 1 and the bottom bar is EN 1.4588 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
34
Fatigue Strength, MPa 160
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
80
Tensile Strength: Ultimate (UTS), MPa 500
540
Tensile Strength: Yield (Proof), MPa 230
240

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 480
1100
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 41
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
33
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 1.8
6.2
Embodied Energy, MJ/kg 23
84
Embodied Water, L/kg 62
200

Common Calculations

PREN (Pitting Resistance) 6.4
44
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
150
Resilience: Unit (Modulus of Resilience), kJ/m3 140
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
18
Strength to Weight: Bending, points 18
18
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 14
11

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.020
Chromium (Cr), % 2.8 to 3.3
19 to 21
Copper (Cu), % 0
0.5 to 1.5
Iron (Fe), % 94.4 to 96.1
41.2 to 50.4
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.1
6.0 to 7.0
Nickel (Ni), % 0
24 to 26
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.020