Heat treatment temperature influence on astm a890 gr 6a super duplex stainless steel microstructure. The chemical composition thus determined shall be reported to the purchaser or his representative, and shall conform to the requirements speci. Ce3mn is the designation in both the aci and astm systems for this material. This menu contains links to the table of contents, all four indexes, and to the search function. Wed be glad to manufacture customized astm a890a995 1b cd4mcun stainless steel ball valve products based on individual demands and provide the best solutions. Handbook of comparative handbook world steel standards. Practical guidelines for the fabrication of duplex stainless steels. Once the chemical composition is established, the properties.
Pdf effect of aging on impact properties of astm a890 grade. Possessing these characteristics, it is not surprising to find the majority, but by no means all, of applications to be seawater related. The e book of comparative world steel standards on cdrom is a fully searchable adobe pdf file. Cited properties are appropriate for the normalized. Lawai is astm a890a995 1b cd4mcun stainless steel ball valve manufacturer. The atlas steels technical handbook of stainless steels. Using a quantitative metallographic technique by manual counting of points in the grid, the delta ferrite content was found to be 54. Molybdenum copper tungsten nitrogen grade type uns aci composition. Thus, the corrosion behavior of astm a890a 890m gr 5a super duplex. Astm a923 were identified as applicable for the a8905a grade to compare and detect. Aciastm ce3mn astm a890 grade 5a, j93404 cast stainless. A database of the pitting corrosion and igc behavior of cast and wrought materials was generated for a greater depth of understanding for the behavior of cast duplex stainless. For annual book of astm standards volume information, refer to the. Centrifuge and dewatering equipment, couplings, heat exchangers, offshore piping systems, paper rolls, pulp digesters, pump and valve components, pressure vessels.
Aci astm cd6mn steel is a duplex stainless steel formulated for casting. What is the family lean duplex ss lower nickel and no molybdenum 2101, 2102, 2202, 2304 duplex ss higher nickel and molybdenum 2205, 2003, 2404. Ferric chloride corrosion test, ferrite measurement using feritscope, astm e562 manual. Steel castings handbook supplement 8 high alloy data sheets corrosion series steel founders society of america.
Atlas steels technical handbook of stainless steels page 5 au grade significantly different from other similar products. Pdf heat treatment can modify the corrosion resistance of stainless steels. A995 requires that weld repairs be made using procedures and welders qualified per astm a488. Last previous edition approved in 2010 as a890a890m 10. Duplex stainless steels are virtually immune to stress corrosion cracking the achilles heel of common austenitic stainless steels and are highly resistant to pitting and crevice corrosion. Astm a890 grade 4a datasheet,astm a890 grade 4a chemical,astm. Cd6mn is the designation in both the aci and astm systems for this material. Metallurgical evaluation of cast duplex stainless steels and. Steel castings handbook supplement 8 high alloy data. Effect of aging on impact properties of astm a890 grade 1c. Standard specification for castings, austeniticferritic.
A890 grade 4a the astm a890 grade 4a cd3mn is a duplex stainless steel cast alloy with the following composition c 0. C or higher and water quench to optimize the microstructure. Astm a890 a890m 18a standard specification for castings. Active standard astm a995 a995m developed by subcommittee. To see matwebs complete data sheet for this material including material property data, metal compositions, material suppliers, etc, please click the button below. Unfortunately, astm a890 has some shortcomings when used to purchase pressureretaining components. C and slow cooling in the furnace to produce its softest condition. This specification covers austeniticferritic duplex stainless steel castings for valves, flanges, fittings, and other pressurecontaining parts.
Charpy samples using feritscope and astm e562 manual point count method. Excellent seawater corrosion resistance combined with nearly twice the strength of common stainless steels. Wilfleys cd4mcun offers superior mechanical properties to 300 series stainless steels with similar corrosion properties. A890 grade 4a machinability june 7 a890 12a standard specification for castings, castings shall be marked for material identification with the. Astm f1886 standard test method for determining integrity of seals for flexible packaging by visual inspection. Once the e book is opened, a menu will appear with several options to navigate and search through the e book. A890 a890m18a standard specification for castings, ironchromiumnickelmolybdenum corrosionresistant, duplex austenitic ferritic for general application duplex stainless steel stainless steel castings steel castings. I have experience with nialbrz, 316ss and carbon steel, but this is the first time that i have to repair a ss duplex part. Astma995 standard specification for castings, austenitic. We also possess advanced precision machining equipments for further processing. Stainless steels are normally produced in the annealed condition. Astma890 standard specification for castings, iron.
Classification and mechanical properties specification average hardness minimum tensile strength minimum yield strength minimum elongation astm a890 grade 1b 245 265 hbn 100,000 psi 689 mpa 70,000 psi 483 mpa 16%. Astm a890a995 1b cd4mcun stainless steel ball valve. The objective of this study was to verify the influence of heat treating temperatures on the microstructure and hardness of astm a890a890m gr 6a super duplex stainless steel type. This is particularly appropriate in new product areas such as duplex stainless steels. A995 includes fewer grades 1b, 2a, 3a, 4a, 5a, and 6a than a890 1a, 1b, 1c, 2a, 3a, 4a, 5a, and 6a, and the composition limits for the common alloys are listed with higher precision in many cases. Casting material duplex stainless steel ce3mnss2507. Aciastm cd6mn astm a890 grade 3a, j93371 cast stainless.
Cited properties are appropriate for the normalized and tempered condition. Effect of aging on impact properties of astm a890 grade 1c super duplex stainless steel. Astm a890 castings, ironchromiumnickelmolybdenum corrosion resistant, duplex austeniteferrite for general application was released in 1988, the first astm standard that covered the modern duplex stainlesssteel casting grades. Pdf heat treatment effects on astm a890a 890m gr 5a. Table 1 heat treatment requirements grade heat treatment 1b heat to 1900f 1040c minimum, hold for sufficient time to heat casting uniformly to temperature, quench in water or rapid cool by other means. Pdf heat treatment effects on astm a890a 890m gr 5a super. The main properties of duplex and super duplex stainless steels represent a. Astm a890 grade 1a datasheet,astm a890 grade 1a chemical. The objective of the program is to determine the suitability of astm a923 standard test methods for detecting detrimental intermetallic phase in wrought duplex austeniticferritic stainless steels for 25 cr cast super duplex stainless steels astm a890 5a. Microstructure control is of extreme importance for castings, as the chemical composition and cooling during solidification inevitably provide conditions for. We also possess advanced precision machining equipments for further processi. Aci astm ce3mn steel is a duplex stainless steel formulated for casting.
Agmf can manufacture all grades of iron and steel alloys. Astm a890 grade 1a datasheet,astm a890 grade 1a chemical,astm. Heat treatment temperature influence on astm a890 gr 6a super. Technical specifications of a890 gr 1a duplex stainless steel, grade astm a890 grade 1a chemical composition, astm a890 grade 1a mechanical properties from steelmaking,hot forgingrolling,heat treatment,cold working. Table 1 heat treatment requirements grade heat treatment 1a, 1b, 1c heat to 1900f 1040c minimum, hold for sufficient time to. Steel castings handbook supplement 8 high alloy data sheets. Astm a890 a890m18a, standard specification for castings. In volume 1 selected grades of duplex stainless steel castings and their.
Bar astm a276 or a479 grade s31803 castings astm a890 grade 4a. Annealing a carbon steel involves heating above 750. Cast duplex stainless steels to astm a890 magsen foundry. This page displays only the text of a material data sheet. Astm a781 refers back to the individual product specification a890 for tensile test requirements. Grade 1b, grade 2a, grade 3a, grade 4a, grade 5a, and grade 6a. The duplex stainless steel alloys have a mixed microstructure of austenite and ferrite, the optimal ratio is 5050, however in actual duplex stainless steel castings the ratio may be 4060 or 6040.
Aciastm ce3mn astm a890 grade 5a, j93404 cast stainless steel. As such, many piping specifications include references to astm a890 and its various duplex grades for piping components such as valves. Astm a890 references astm a781 castings, steel and alloy, common requirements, for general industrial use for coverage of general requirements. Cast duplex stainless steels are also referred to as duplex stainless steel castings and duplex alloy steel castings.
Representative properties for solution treated welds in castings of astm a890 grade 5a. Aciastm ce3mn steel is a duplex stainless steel formulated for casting. For annual book of astm standards volume information, refer to the standards document summary page on the astm website. Specifications durcomet 100 is produced to the chemical and mechanical requirements of astm a995 or a890, grade cd4mcun 1b. The steel shall conform to the required chemical composition for carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, molybdenum, copper, tungsten, and nitrogen. Final report, volume 1, metallurgical evaluation of cast. Please have a look at the table below and let us know what grade you would like for your parts or speak to our consultant to advice you on what grade is most suitable for your requirements. Partners, i have to repair a pump casing in our shop, the casing is duplex construction astm a890. Mar 20, 2008 unfortunately, astm a890 has some shortcomings when used to purchase pressureretaining components. I need to know the welding procedures and the rod type i have to use.
Supply any kind of astm a890a995 1b cd4mcun stainless steel ball valve over 25 years. Effect of heat treatment on the mechanical properties of astm a. Astm a995 a995m 19 standard specification for castings. Pdf effect of aging on impact properties of astm a890.
Technical specifications of astm a890 grade 4a duplex stainless steel chemical composition, mechanical properties from steelmaking,forging,rolling,heat treatment,cold working. Castings shall be marked for material identification with the specification designation and grade. The term anneal, also solution anneal, used for stainless steels means heat to 1040. Figure 57 astm a8905a weldability bend test sample a with.