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ASTM A387 Grade 21L Class 1 vs. EN 1.4945 Stainless Steel

Both ASTM A387 grade 21L class 1 and EN 1.4945 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, 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 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
19 to 34
Fatigue Strength, MPa 160
230 to 350
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 310
430 to 460
Tensile Strength: Ultimate (UTS), MPa 500
640 to 740
Tensile Strength: Yield (Proof), MPa 230
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 480
920
Melting Completion (Liquidus), °C 1470
1490
Melting Onset (Solidus), °C 1430
1440
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
30
Density, g/cm3 7.9
8.1
Embodied Carbon, kg CO2/kg material 1.8
5.0
Embodied Energy, MJ/kg 23
73
Embodied Water, L/kg 62
150

Common Calculations

PREN (Pitting Resistance) 6.4
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 140
210 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
22 to 25
Strength to Weight: Bending, points 18
20 to 22
Thermal Diffusivity, mm2/s 11
3.7
Thermal Shock Resistance, points 14
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.1
0.040 to 0.1
Chromium (Cr), % 2.8 to 3.3
15.5 to 17.5
Iron (Fe), % 94.4 to 96.1
57.9 to 65.7
Manganese (Mn), % 0.3 to 0.6
0 to 1.5
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.5
0.3 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5