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EN 1.4594 Stainless Steel vs. ASTM A387 Grade 21 Steel

Both EN 1.4594 stainless steel and ASTM A387 grade 21 steel are iron alloys. They have 81% 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 1.4594 stainless steel and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11 to 17
21
Fatigue Strength, MPa 490 to 620
160 to 250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
74
Shear Strength, MPa 620 to 700
310 to 370
Tensile Strength: Ultimate (UTS), MPa 1020 to 1170
500 to 590
Tensile Strength: Yield (Proof), MPa 810 to 1140
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 820
480
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
41
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 15
4.1
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 3.2
1.8
Embodied Energy, MJ/kg 45
23
Embodied Water, L/kg 130
62

Common Calculations

PREN (Pitting Resistance) 19
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1660 to 3320
140 to 320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 36 to 41
18 to 21
Strength to Weight: Bending, points 29 to 31
18 to 20
Thermal Diffusivity, mm2/s 4.4
11
Thermal Shock Resistance, points 34 to 39
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.070
0.050 to 0.15
Chromium (Cr), % 13 to 15
2.8 to 3.3
Copper (Cu), % 1.2 to 2.0
0
Iron (Fe), % 72.6 to 79.5
94.4 to 96
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 1.2 to 2.0
0.9 to 1.1
Nickel (Ni), % 5.0 to 6.0
0
Niobium (Nb), % 0.15 to 0.6
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.7
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.025