Menu
Search
Filters
Close
Menu

51318-10810-Nickel-based Alloy UNS N06845 with Superior Localized Corrosion Resistance for Sour Environment

Picture for Nickel-based Alloy UNS N06845 with Superior Localized Corrosion Resistance for Sour Environment
Available for download

An advanced material of nickel-based alloy has been developed for Oil Country Tubular Goods (OCTG ) to be applied in sour conditions to injection of seawater into wells for enhanced oil and gas recovery.

Product Number: 51318-10810-SG
Author: Masayuki SAGARA / Yuhei Suzuki / Masaki Ueyama / Yusaku Tomio / Tomohiko Omura / Hisashi Amaya
Publication Date: 2018
Industry: Oil and Gas Production
$0.00
$20.00
$20.00

Advanced material of nickel-based alloy for Oil Country Tubular Goods (OCTG ) has been developed in order to be usefully applied to sour condition and seawater injection well. At oil and gas services, injection of medium such as seawater, carbon dioxide and wet gas to well makes oil and gas be retrieved. These medium, however, causes deterioration of the corrosion environment. Hence, these conditions may require the usage of superior corrosion resistant alloy. The UNS No. of the material is N06845. The chemical composition of the one is 22wt.%Cr-45wt.%Ni-6wt.%Mo with tungsten, copper and nitrogen. The material type of the alloy complies with the condition for type 4d of nickel based alloy in ISO15156-3. The strength of the material is enhanced by alloying nitrogen and cold working so that it can be achieved to 125ksi of yield strength.

The developed alloy has exhibited equivalent stress corrosion cracking resistance in severe sour condition to conventional UNS N06255 (25wt.%Cr-50wt.%Ni-6wt.%Mo) with 125ksi grade. The alloying tungsten and copper advances the corrosion resistance of the material because effective corrosion products form at the surface of the metal under the sour condition. In addition to that, alloying tungsten and nitrogen as well as chromium and molybdenum improves the pitting and crevice corrosion resistance. The PREW (Pitting Resistance Equivalent number with tungsten (W); %Cr +3.3*(%Mo +0.5*%W ) +16*%N ) of this alloy achieves more than 50.

Key words: CRA, Stress corrosion cracking, Hydrogen sulfide, Seawater, Hydrogen Embrittlement, Cold Work, Chromium, Nickel, Molybdenum, Copper, Tungsten, Nitrogen.

Advanced material of nickel-based alloy for Oil Country Tubular Goods (OCTG ) has been developed in order to be usefully applied to sour condition and seawater injection well. At oil and gas services, injection of medium such as seawater, carbon dioxide and wet gas to well makes oil and gas be retrieved. These medium, however, causes deterioration of the corrosion environment. Hence, these conditions may require the usage of superior corrosion resistant alloy. The UNS No. of the material is N06845. The chemical composition of the one is 22wt.%Cr-45wt.%Ni-6wt.%Mo with tungsten, copper and nitrogen. The material type of the alloy complies with the condition for type 4d of nickel based alloy in ISO15156-3. The strength of the material is enhanced by alloying nitrogen and cold working so that it can be achieved to 125ksi of yield strength.

The developed alloy has exhibited equivalent stress corrosion cracking resistance in severe sour condition to conventional UNS N06255 (25wt.%Cr-50wt.%Ni-6wt.%Mo) with 125ksi grade. The alloying tungsten and copper advances the corrosion resistance of the material because effective corrosion products form at the surface of the metal under the sour condition. In addition to that, alloying tungsten and nitrogen as well as chromium and molybdenum improves the pitting and crevice corrosion resistance. The PREW (Pitting Resistance Equivalent number with tungsten (W); %Cr +3.3*(%Mo +0.5*%W ) +16*%N ) of this alloy achieves more than 50.

Key words: CRA, Stress corrosion cracking, Hydrogen sulfide, Seawater, Hydrogen Embrittlement, Cold Work, Chromium, Nickel, Molybdenum, Copper, Tungsten, Nitrogen.

Product tags
Also Purchased
Picture for Evaluation of the Effect of Oxygen on CRA Materials
Available for download

51318-10799-Evaluation of the Effect of Oxygen on CRA Materials

Product Number: 51318-10799-SG
Author: Arwa Al Wahaibi / Talal Al Nabhani / Pedro Rincon Flores / Nassar Al Behalni
Publication Date: 2018
$20.00

This paper will present the testing results and the effect of oxygen on Austenitic Stainless Steel Grade 316L, Duplex Stainless Steel (22% Cr DSS) and Super Duplex Stainless Steel (25% Cr SDSS).
Picture for Corrosion Inhibition of Stainless Steel in 0.5 M HCl by C6H5NH2
Available for download

51318-10807-Corrosion Inhibition of Stainless Steel in 0.5 M HCl by C6H5NH2

Product Number: 51318-10807-SG
Author: Olugbenga Adeshola OMOTOSHO / Joshua Olusegun OKENIYI / Abimbola Patricia POPOOLA
Publication Date: 2018
$20.00

In this study, different concentrations of C6H5NH2 (Aniline) were employed for investigating its corrosion inhibition of stainless steel in 0.5 M HCl.
Picture for Mechanism of failure of IN657 high temperature tube support pipes after 10 years of service
Available for download

51318-10815-Mechanism of failure of IN657 high temperature tube support pipes after 10 years of service

Product Number: 51318-10815-SG
Author: Ihho Park / Raghavan Ayer / Yunjo Ro / Seokwon Kim / Jae-Woong Kim
Publication Date: 2018
$20.00

Microstructural analysis of failed support pipes made of cast UNS R20501 alloy in a reboiling heater unit was performed to understand its physical metallurgy and the origin of the pipe failures.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support