ASTM A217/A217M-22 PDF

Overview

ASTM A217/A217M-22 is a standard specification developed by ASTM International for steel castings made from martensitic stainless and alloy steel. These castings are intended for pressure-containing parts-such as valves, flanges, and fittings-primarily used in high-temperature and corrosive service environments. The specification addresses a range of steel grades, performance criteria, heat treatments, and quality requirements, making it a widely-referenced document in industries such as power generation, oil and gas, and petrochemicals.

This standard is endorsed by organizations like the Manufacturers Standardization Society and the American Foundrymen’s Society, and is recognized in major industry codes, including those by the U.S. Department of Defense and ASME Boiler and Pressure Vessel Code.

Key Topics

• Material Grades: Covers one grade of martensitic stainless steel (CA15) and nine grades of ferritic alloy steel (WC1, WC4, WC5, WC6, WC9, WC11, C5, C12, C12A).
• Design Criteria: Steel grade selection depends on design conditions, mechanical properties, corrosion resistance, and high-temperature performance.
• Heat Treatment: Specifies required treatments such as normalizing, tempering, and for certain grades, accelerated cooling. Heat treatment must be completed after allowed cooling.
• Chemical Composition: Mandates strict adherence to specified chemical limits on carbon, molybdenum, chromium, nickel, vanadium, manganese, phosphorus, sulfur, silicon, and other alloying elements.
• Mechanical Properties: Requires minimum standards for tensile strength, yield strength, elongation, and reduction of area, varying by grade.
• Surface Quality and Inspection: Castings must be free from defects like cracks, adhering sand, and hot tears, and are subject to visual, ultrasonic, magnetic particle, or radiographic inspections as determined by the purchaser.
• Weldability: While compatible with fusion welding, weldability varies by grade and the responsibility for determining appropriate welding techniques lies with the purchaser.
• Supplementary Requirements: Includes options for enhanced chemical limits, post-weld heat treatment, additional non-destructive testing, and specialized requirements upon agreement.

Applications

ASTM A217/A217M-22 steel castings are widely used for:

• Valves: Pressure-containing valve bodies and components for steam, gas, and chemical service.
• Flanges: Connection points in piping systems exposed to high temperature and corrosive conditions.
• Fittings: Elbows, tees, reducers, and other fittings in power plants and process industries.
• Components for High-Temperature Service: Including critical parts in refineries, petrochemical plants, and power stations, especially in steam and hot-gas lines.

These castings are chosen for their robust mechanical properties at elevated temperatures and excellent resistance to corrosion and oxidation, ensuring reliability and safety in demanding operational environments.

Related Standards

For complementary requirements, users should consult:

• ASTM A216/A216M: Standard for carbon steel castings for pressure-containing parts in high-temperature service.
• ASTM A352/A352M: Covers ferritic and martensitic steel castings for low-temperature applications.
• ASTM A487/A487M: Specification for steel castings suitable for pressure service.
• ASTM A703/A703M: General requirements for steel castings used in pressure applications.
• ASME SA-217/SA-217M: The corresponding ASME standard for boiler and pressure vessel applications.
• AWS Welding Standards: Specifications for appropriate welding electrodes and processes for alloy and stainless steel castings.
• ASTM A802/A802M & A985/A985M: Standards for visual acceptance, inspection, and general requirements for investment castings.

By adhering to ASTM A217/A217M-22, manufacturers and end-users can ensure the performance, safety, and consistency necessary for critical pressure-containing steel castings used in challenging industrial environments.