ASTM A694 / A694M – 08 Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service
ASTM A694 Standard covers carbon and alloy steel forgings for pipe flanges, fittings, valves, and parts for high-pressure transmission service. A chemical heat analysis of the steel shall be made, and the steel shall conform to specified chemical composition requirements. Materials adhere to testing and tensile property requirements as well.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers forged or rolled steel pipe flanges, forged fittings, valves, and parts suitable for use with high-strength transmission-service pipe. Included are flanges, fittings, and similar parts ordered either to dimensions specified by the purchaser or to ASME or MSS dimensional standards referenced in Section 2.
1.2 Several grades of material, based on minimum yield strength requirements, are covered, as indicated in Table 1.
1.3 Supplementary Requirements are provided. Supplementary Requirement S 1 is provided for use when purchaser approval is required for repair welding.
1.4 This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
|Grade||Yield Strength (0.2 % Offset), min, ksi [MPa]||Tensile Strength
min, ksi [MPa]
|Elongation in 2 in. or 50 mm, min %|
|F42||42 ||60 ||20|
|F46||46 ||60 ||20|
|F48||48 ||62 ||20|
|F50||50 ||64 ||20|
|F52||52 ||66 ||20|
|F56||56 ||68 ||20|
|F60||60 ||75 ||20|
|F65||65 ||77 ||20|
|F70||70 ||82 ||18|