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EN 1.4378 Stainless Steel vs. ASTM A387 Grade 21L Class 1

Both EN 1.4378 stainless steel and ASTM A387 grade 21L class 1 are iron alloys. They have 69% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4378 stainless steel and the bottom bar is ASTM A387 grade 21L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 340
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14 to 34
21
Fatigue Strength, MPa 340 to 550
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 510 to 680
310
Tensile Strength: Ultimate (UTS), MPa 760 to 1130
500
Tensile Strength: Yield (Proof), MPa 430 to 970
230

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 910
480
Melting Completion (Liquidus), °C 1390
1470
Melting Onset (Solidus), °C 1350
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
13

Otherwise Unclassified Properties

Base Metal Price, % relative 12
4.1
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 2.7
1.8
Embodied Energy, MJ/kg 39
23
Embodied Water, L/kg 150
62

Common Calculations

PREN (Pitting Resistance) 23
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 220
84
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 2370
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 41
18
Strength to Weight: Bending, points 24 to 31
18
Thermal Shock Resistance, points 16 to 23
14

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.1
Chromium (Cr), % 17 to 19
2.8 to 3.3
Iron (Fe), % 61.2 to 69
94.4 to 96.1
Manganese (Mn), % 11.5 to 14.5
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 2.3 to 3.7
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.060
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025