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New Experiences With Explosion Clad Alloys UNS N06058 And UNS N06059

The alloys used as clad material for this study are members of the so-called “C-family”. It consists of Ni-Cr-Mo alloys, which are known for combining the corrosion resistance of Ni-Cr alloys in oxidizing media with corrosion resistance of Ni-Mo alloys in reducing media. As a result, these materials have proven to be extremely durable in a wide range of highly aggressive media. The development of these materials started in the 1930s with Alloy C. This alloy showed remarkable corrosion resistance in a wide spread of media, low sensitivity for pitting or crevice corrosion and virtual immunity to chloride induced stress corrosion cracking.

Product Number: 51322-17650-SG
Author: P. Hübner, H. Alves, O. Sarrat, R. Behrens, D. Niespodziany, J. König
Publication Date: 2022
$0.00
$20.00
$20.00

Prior work showed that the Ni-Cr-Mo alloys UNS N06058 and UNS N06059 can be reliably explosion clad to carbon steel and are fully compliant with ASME Code. Additionally, corrosion tests in hydrochloric and sulfuric acid, in “green death solution” and further mechanical tests according to SA 265 (Nickel and Nickel-Base Alloy-Clad Steel Plate) have been conducted.

To fabricate equipment such as pressure vessels, explosion cladding is followed by shell and head forming. If requested by the codes, a post weld heat treatment may also be mandatory. After this sequence, the clad bond zone layer has been investigated with respect to mechanical properties and corrosion resistance.

Therefore, best practices for explosive cladding and head forming were identified and evidence was provided that the explosive cladding process does not affect the above-mentioned properties of Ni-Cr-Mo materials. The effect of the post weld heat treatment on the corrosion properties in hydrochloric and sulfuric acid was also investigated and differences between alloy UNS N06058 and alloy UNS N06059 could be detected.

Prior work showed that the Ni-Cr-Mo alloys UNS N06058 and UNS N06059 can be reliably explosion clad to carbon steel and are fully compliant with ASME Code. Additionally, corrosion tests in hydrochloric and sulfuric acid, in “green death solution” and further mechanical tests according to SA 265 (Nickel and Nickel-Base Alloy-Clad Steel Plate) have been conducted.

To fabricate equipment such as pressure vessels, explosion cladding is followed by shell and head forming. If requested by the codes, a post weld heat treatment may also be mandatory. After this sequence, the clad bond zone layer has been investigated with respect to mechanical properties and corrosion resistance.

Therefore, best practices for explosive cladding and head forming were identified and evidence was provided that the explosive cladding process does not affect the above-mentioned properties of Ni-Cr-Mo materials. The effect of the post weld heat treatment on the corrosion properties in hydrochloric and sulfuric acid was also investigated and differences between alloy UNS N06058 and alloy UNS N06059 could be detected.

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Picture for Effect of Heat Treatment on Nickel Alloy Clad Plates
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51315-5680-Effect of Heat Treatment on Nickel Alloy Clad Plates

Product Number: 51315-5680-SG
ISBN: 5680 2015 CP
Author: Larry Paul
Publication Date: 2015
$20.00