ASTM-A985 2012(Redline)

This specification covers a group of common requirements that are mandatory for steel castings produced by the investment casting process for pressure-containing parts. Master heats shall be made by the electric furnace process with or without separate refining such as argon-oxygen-decarburization (AOD), vacuum-oxygen degassing (VOD), vacuum-induction-melting (VIM). Ferritic and martensitic steel shall be cooled after pouring to provide complete transformation of austenite prior to heat treatment to enhance mechanical properties. Chemical, heat, and product analyses shall be performed and the chemical composition thus determined shall conform to the prescribed values in carbon, manganese, silicon, phosphorus, sulfur, nickel, chromium, molybdenum, vanadium, tungsten, copper, and aluminum. Tensile testing shall be done on the castings and shall meet the required yield and tensile strength, elongation, and reduction of area. Each casting shall also be tested after machining to hydrostatic shell pressure test and shall not show any leaks.

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1. Scope

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

A216/A216M Specification for Steel Castings, Carbon, Suitable for Fusion Welding, for High-Temperature Service A217/A217M Specification for Steel Castings, Martensitic Stainless and Alloy, for Pressure-Containing Parts, Suitable for High-Temperature Service A351/A351M Specification for Castings, Austenitic, for Pressure-Containing Parts A352/A352M Specification for Steel Castings, Ferritic and Martensitic, for Pressure-Containing Parts, Suitable for Low-Temperature Service A370 Test Methods and Definitions for Mechanical Testing of Steel Products A380 Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems A389/A389M Specification for Steel Castings, Alloy, Specially Heat-Treated, for Pressure-Containing Parts, Suitable for High-Temperature Service A487/A487M Specification for Steel Castings Suitable for Pressure Service A488/A488M Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel A609/A609M Practice for Castings, Carbon, Low-Alloy, and Martensitic Stainless Steel, Ultrasonic Examination Thereof A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products A800/A800M Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof A903/A903M Specification for Steel Castings, Surface Acceptance Standards, Magnetic Particle and Liquid Penetrant Inspection A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys A967 Specification for Chemical Passivation Treatments for Stainless Steel Parts A990 Specification for Castings, Iron-Nickel-Chromium and Nickel Alloys, Specially Controlled for Pressure Retaining Parts for Corrosive Service A991/A991M Test Method for Conducting Temperature Uniformity Surveys of Furnaces Used to Heat Treat Steel Products A995/A995M Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts A1058 Test Methods for Mechanical Testing of Steel Products–Metric A1067 Specification for Test Coupons for Steel Castings E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications E94 Guide for Radiographic Examination E125 Reference Photographs for Magnetic Particle Indications on Ferrous Castings E165 Practice for Liquid Penetrant Examination for General Industry E186 Reference Radiographs for Heavy-Walled (2 to 412-in. (50.8 to 114-mm)) Steel Castings E192 Reference Radiographs of Investment Steel Castings for Aerospace Applications E208 Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels E280 Reference Radiographs for Heavy-Walled (412 to 12-in. (114 to 305-mm)) Steel Castings E340 Test Method for Macroetching Metals and Alloys E353 Test Methods for Chemical Analysis of Stainless, Heat-Resisting, Maraging, and Other Similar Chromium-Nickel-Iron Alloys E354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and Cobalt Alloys