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EN 1.4317 Stainless Steel vs. ASTM A387 Grade 21L Class 1

Both EN 1.4317 stainless steel and ASTM A387 grade 21L class 1 are iron alloys. They have 86% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4317 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 190
190
Elongation at Break, % 17
21
Fatigue Strength, MPa 380
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 860
500
Tensile Strength: Yield (Proof), MPa 630
230

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 770
480
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
41
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
4.1
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.4
1.8
Embodied Energy, MJ/kg 33
23
Embodied Water, L/kg 110
62

Common Calculations

PREN (Pitting Resistance) 14
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
84
Resilience: Unit (Modulus of Resilience), kJ/m3 1010
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31
18
Strength to Weight: Bending, points 26
18
Thermal Diffusivity, mm2/s 7.0
11
Thermal Shock Resistance, points 30
14

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.1
Chromium (Cr), % 12 to 13.5
2.8 to 3.3
Iron (Fe), % 78.7 to 84.5
94.4 to 96.1
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.7
0.9 to 1.1
Nickel (Ni), % 3.5 to 5.0
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.025