Alloy 602 CA

Material

Alloy 602 CA, UNS N06025, W.Nr. 2.4633

Overview

Alloy 602 CA is a high-temperature material with excellent resistance to creep and oxidation up to 1200°C
(2192°F). It is usually delivered in the solution-annealed state with an oxidized or descaled surface.

Characteristics

The material is characterized by

  • Excellent high-temperature creep behavior values
  • Outstanding resistance to oxidation at high temperatures, even under cyclical conditions
  • Good oxidation resistance up to 800°C
  • Very good corrosion resistance in carburizing and oxidizing / chlorinating media
  • Approval for pressure containers with operating temperatures from -10 to 1150 °C (14 to 2102 °F) according to VdTÜV material data sheet 540 and up to 1650 °F (899 °C) according to ASME Code Section I as well as up to 1800 °F (982 °C) for applications according to section VIII Div. I..

Application

Alloy 602 CA has a wide range of application in the high-temperature field of thermo technical and chemical processes, in power plants and in the automotive industry.

Chemical composition (wt%)

Material Fe Ni Zr Cr Al Ti Cu
Alloy 602 CA 8.0-11.0 Bal. 0.01-0.10 24.0-26.0 1.80-2.40 0.10-0.20 ≤0.10
Material C Mn Si P S Y
Alloy 602 CA 0.15-0.25 ≤0.50 ≤0.50 ≤0.020 ≤0.010 0.05-0.12

Mechanical property

Material Tensile strength
MPa		 Yield strength at
0.2 offset MPa		 Elongation in 2”
% min.
Alloy 602 CA ≥680 ≥270 ≥30

Corrosion resistance

Alloy 602 CA is especially characterized by very good oxidation resistance, which is better across the entire application range up to 1200°C (2192°F) than with Alloy 601. Even under extreme conditions, such as cyclic heating and cooling, Alloy 602 CA retains this property, which is caused by a tight and adhering alumina layer, which is very resistant to chipping.

High temperature oxidation tests show that, compared to other high temperature materials, this material has the lowest mass loss under cyclic stress. Caused by its chromium and aluminum content, Alloy 602 CA is also highly resistant in oxidizing sulfur-containing atmospheres at elevated temperatures.

Available process

Cold worked and bright annealed

Cold worked, bright annealed, polished (MP, EP etc.)

Common tests

  • ◎ Chemical composition
  • ◎ Tension
  • ◎ Hardness
  • ◎ Flaring
  • ◎ Flange
  • ◎ Flattening
  • ◎ Micro structure
  • ◎ Hydrostatic
  • ◎ NDT
  • ◎ Intergranular Corrosion
  • ◎ Surface condition
  • ◎ Shape and dimension
  • ◎ Positive Material Identification

Product forms

Capillary tube

  • ◎ OD 0.30 ~ 3.0 mm
  • ◎ WT 0.05 ~ 0.5 mm

Precision seamless tube

  • ◎ OD 3.0 ~ 89 mm
  • ◎ WT 0.10 ~ 10.0 mm

HP / UHP BA+ tube

  • ◎ OD 3.0 ~ 76 mm
  • ◎ WT 0.10 ~ 10.0 mm

Service

  • ◎ Precision cutting
  • ◎ Tube surface treatment, like ID surface super mirror polishing, best level could reach Ra0.0015um
  • ◎ Tube deep processing, like coiling, bending, end forming, body forming, laser processing, various needles processing, built to drawing and sample, etc.