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List of Alloys & profiles

List of Alloys & profiles

Alloy Wire International

Datasheet: Alloy 20 CB 3

Alloy 20 CB 3

Alloy 20 CB 3 is an austenitic stainless steel with excellent resistance to hot sulphuric acid and many other aggressive environments that would readily attack stainless steel 316. Alloy 20 CB 3 exhibits superior resistance to stress-corrosion cracking in boiling 20 to 40% sulphuric acid, and is commonly used for chemical, pharmaceutical and food processing, as well as in tanks, piping, heat exchangers and much more.

Available in all profile options

Alloy 20 CB 3 - Alloy Wire International 1

Key Features

Alloy 20 CB 3 offers the following key features:

Excellent resistance to hot sulphuric acid & many other aggressive environments that would attack ST/ST 316.
Superior resistance to stress corrosion cracking in boiling 20 – 40% sulphuric acid.

Typical Applications

Alloy 20 CB 3 is known to be suitable for the following applications:

Chemical and allied industries
Processing of synthetic rubber
High-octane gasoline
Solvents
Pharmaceuticals
Agrichemicals


Designations

W.Nr 2.4660
UNS N08020
AWS 130

Specifications

ISO 15156-3
(NACE MR 0175)

Chemical Composition

The chemical composition of Alloy 20 CB 3 is indicated in the table below:

ElementMin %Max %
C0.07
Si1.00
Mn2.00
P0.045
S0.035
Cr19.0021.00
Mo2.003.00
Ni32.5038.00
Cu3.004.00
Nb8 x C1.00
Febal

Alloy Details

Alloy 20 CB 3 density, melting point, coefficient of expansion, modulus of rigidity, and elasticity is indicated in the table below:

DensityMelting PointCoefficient of ExpansionModulus of RigidityModulus of Elasticity
8.08 g/cm³1425 °C14.69 μm/m °C (20 – 100 °C)73.6 kN/mm²193 kN/mm²
0.292 lb/in³2600 °F8.16 x 10-6 in/in °F (70 – 212 °F)10675 ksi27993 ksi

Heat treatment of finished parts

The typical heat treatment of Alloy 20 CB 3:

Condition as supplied by AWITypeTemperatureTimeCooling
Annealed or Spring TemperStress Relieve250 – 530 °C (480 – 990 °F)1 HrAir

Properties

The typical mechanical properties of Alloy 20 CB 3:

Annealed
Approx. tensile strength<900 N/mm²<131 ksi
Approx. operating temperature-200 to +300 °C-330 to +570 °F
Spring Temper
Approx. tensile strength1200 – 1800 N/mm²174 – 261 ksi
Approx. operating temperature-200 to +300 °C-330 to +570 °F

The above tensile strength ranges are typical. If you require different please ask.