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ASTM A387 Grade 21L Class 1 vs. EN 1.3956 Stainless Steel

Both ASTM A387 grade 21L class 1 and EN 1.3956 stainless steel are iron alloys. They have 62% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 1.3956 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
27
Fatigue Strength, MPa 160
240
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
79
Tensile Strength: Ultimate (UTS), MPa 500
650
Tensile Strength: Yield (Proof), MPa 230
330

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 480
1080
Melting Completion (Liquidus), °C 1470
1420
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
22
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
4.8
Embodied Energy, MJ/kg 23
68
Embodied Water, L/kg 62
180

Common Calculations

PREN (Pitting Resistance) 6.4
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
150
Resilience: Unit (Modulus of Resilience), kJ/m3 140
270
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
23
Strength to Weight: Bending, points 18
21
Thermal Shock Resistance, points 14
18

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.060
Chromium (Cr), % 2.8 to 3.3
20.5 to 23.5
Iron (Fe), % 94.4 to 96.1
51.9 to 62.1
Manganese (Mn), % 0.3 to 0.6
4.0 to 6.0
Molybdenum (Mo), % 0.9 to 1.1
1.5 to 3.0
Nickel (Ni), % 0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
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 to 0.030
Vanadium (V), % 0
0.1 to 0.3