UNS S21640 Stainless Steel
Austenitic & General Stainless Steels
Property Overview
Density7.7g/cm³
Elastic Modulus200GPa
Tensile Strength740MPa
Yield Strength350MPa
Brinell Hardness230HB
Maximum Service Temperature940°C
Chemical Composition
C
0 to 0.080%
CR
17.5 to 19.5%
NI
4.0 to 6.5%
MO
0.5 to 2.0%
MN
3.5 to 6.5%
SI
0 to 1.0%
N
0.080 to 0.3%
P
0 to 0.060%
S
0 to 0.030%
NB
0.1 to 1.0%
FE
63 to 74.3%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Elongation at Break
46 %
Fatigue Strength
320 MPa
Poisson's Ratio
0.28
Shear Modulus
78 GPa
Shear Strength
520 MPa
Tensile Strength: Ultimate (UTS)
740 MPa
Tensile Strength: Yield (Proof)
350 MPa
Hardness
Brinell Hardness
230
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
290 J/g
Maximum Temperature: Corrosion
490 °C
Maximum Temperature: Mechanical
940 °C
Melting Completion (Liquidus)
1430 °C
Melting Onset (Solidus)
1380 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
15 W/m-K
Thermal Diffusivity
4.0 mm 2 /s
Thermal Expansion
17 µm/m-K
Thermal Shock Resistance
16 points
Electrical
Electrical Conductivity: Equal Volume
2.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
2.8 % IACS
Calculated
PREN (Pitting Resistance)
26
Resilience: Ultimate (Unit Rupture Work)
280 MJ/m 3
Resilience: Unit (Modulus of Resilience)
300 kJ/m 3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
27 points
Strength to Weight: Bending
23 points
Environmental
Base Metal Price
17 % relative
Embodied Carbon
3.6 kg CO 2 /kg material
Embodied Energy
51 MJ/kg
Embodied Energy
51 MJ/kg 22 x 10 3 BTU/lb
Embodied Water
150 L/kg
Embodied Water
150 L/kg 18 gal/lb
Registered Designations & Aliases
S21640UNS S21640 Stainless Steel
Standards
ASTM A240 ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications