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ASTM A387 Grade 21L Class 1 vs. EN 1.4104 Stainless Steel

Both ASTM A387 grade 21L class 1 and EN 1.4104 stainless steel are iron alloys. They have 86% 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 21L class 1 and the bottom bar is EN 1.4104 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
11 to 23
Fatigue Strength, MPa 160
230 to 310
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 310
400 to 450
Tensile Strength: Ultimate (UTS), MPa 500
630 to 750
Tensile Strength: Yield (Proof), MPa 230
350 to 560

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 480
860
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
8.5
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
120

Common Calculations

PREN (Pitting Resistance) 6.4
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
77 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 140
310 to 800
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
23 to 27
Strength to Weight: Bending, points 18
21 to 24
Thermal Diffusivity, mm2/s 11
6.7
Thermal Shock Resistance, points 14
22 to 27

Alloy Composition

Carbon (C), % 0 to 0.1
0.1 to 0.17
Chromium (Cr), % 2.8 to 3.3
15.5 to 17.5
Iron (Fe), % 94.4 to 96.1
78.8 to 84.1
Manganese (Mn), % 0.3 to 0.6
0 to 1.5
Molybdenum (Mo), % 0.9 to 1.1
0.2 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