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EN 1.4634 Stainless Steel vs. ASTM A387 Grade 21L Class 1

Both EN 1.4634 stainless steel and ASTM A387 grade 21L class 1 are iron alloys. Both are furnished in the annealed condition. They have 82% 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 EN 1.4634 stainless steel and the bottom bar is ASTM A387 grade 21L class 1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 21
21
Fatigue Strength, MPa 180
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 340
310
Tensile Strength: Ultimate (UTS), MPa 540
500
Tensile Strength: Yield (Proof), MPa 280
230

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 900
480
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 21
41
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 13
4.1
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.9
1.8
Embodied Energy, MJ/kg 42
23
Embodied Water, L/kg 140
62

Common Calculations

PREN (Pitting Resistance) 19
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 93
84
Resilience: Unit (Modulus of Resilience), kJ/m3 200
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 20
18
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 5.8
11
Thermal Shock Resistance, points 19
14

Alloy Composition

Aluminum (Al), % 0.2 to 1.5
0
Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 17.5 to 18.5
2.8 to 3.3
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 74.9 to 81.8
94.4 to 96.1
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.9 to 1.1
Nickel (Ni), % 0 to 0.5
0
Niobium (Nb), % 0.3 to 1.0
0
Phosphorus (P), % 0 to 0.050
0 to 0.025
Silicon (Si), % 0.2 to 1.5
0 to 0.5
Sulfur (S), % 0 to 0.050
0 to 0.025