Supplier and Exporter of Duplex Steel ASTM A Pipe Fittings, ASTM A Butt weld Fittings, ASTM A Duplex Welded Fittings. Buy ASTM. ASTM A/AM: Standard Specification for Wrought Ferritic, Ferritic/ Austenitic, and Martensitic Stainless Steel Piping Fittings. ASTM A / AM Standard Specification for Wrought Ferritic, Ferritic/ Austenitic, and Martensitic Stainless Steel Piping Fittings.
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Duplex stainless steels are extremely corrosion resistant, work hardenable alloys. Their microstructures consist of a mixture of austenite and ferrite phases. As a result, duplex stainless steels display properties characteristic of both austenitic and ferritic stainless steels.
This combination of properties can mean some compromise when compared with pure austenitic and pure ferritic grades. Duplex stainless steels are in most cases, tougher than ferritic stainless steels. Strengths of duplex stainless steels can in some cases be double that for austenitic stainless steels. Whilst duplex stainless steels are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steels.
However, the corrosion resistance of the least resistant duplex stainless steels is greater than that for the most commonly used grades of stainless steels, i. Duplex steels are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.
It is reasonable to expect specifications in these standards to be similar but not necessarily identical to those given in this q815.
Duplex stainless steels are extremely corrosion resistant. They have high resistance to intergranular corrosion. Even in chloride and sulphide environments, duplex stainless steels exhibit very high resistance to stress corrosion cracking. At low temperatures duplex stainless steels have better ductility than the ferritic and martensitic grades. Fabrication of all a8115 steels should be done only with tools dedicated to stainless steel materials.
Tooling and work surfaces must be thoroughly cleaned before use.
ASTM A – Table 4 – Tolerances? – ASTM (testing materials) Code Issues – Eng-Tips
These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product. Zstm machinable, the high strengths of duplex stainless steels makes machining difficult. This means coolants and lubricants are necessary and must be used in large quantities.
Duplex stainless steels have good weldability. All standard welding processes can be used. They are not quite as easily welded as the austenitic grades but low thermal expansion in duplex grades reduces distortion and residual stresses after welding. The recommended filler material for stainless steel is asgm This Data is indicative only and as such is not to be relied upon in place of the full specification.
ASTM A Duplex Steel and Super Duplex Pipe Fittings Supplier
aa815 In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon. Please note that the ‘Datasheet Update’ date shown above is no guarantee of accuracy or whether the datasheet is up to date.
No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources. Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.
ASTM A815 Pipe / Buttweld Fittings Suppliers
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Datasheet Search Search Term: Last Datasheet Revision 14 November Disclaimer This Data is indicative only and as such is not to be relied upon in place of the full specification.