WPHY stands for what?
I believe W means wrought, and it appears that Y refers to yield strength, with the number indicating the minimum specified YS, i.e. Y 52 would indicate a minimum yield strength of 52 ksi. But let me verify this.
A860 is the ASTM standard.
ASTM A860 / A860M - 08 Standard Specification for Wrought High-Strength Low-Alloy Steel Butt-Welding Fittings
This specification covers wrought high-strength low-alloy butt-welding steel fittings of seamless and electric fusion-welded construction for applications in high-pressure gas and oil transmission and distribution systems. Starting materials shall consist of plate, sheet, forgings, forging quality bar, and seamless or fusion-welded tubular products with filler metal added. Materials shall be heat treated by normalizing, quenching, and tempering or stress relieving. Specimens shall conform to required values of chemical composition and mechanical properties, namely: yield strength, tensile strength, elongation, notch toughness, and hardness. This specification does not require hydrostatic testing.
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 wrought high-strength ferritic steel butt-welding fittings of seamless and electric fusion-welded construction covered by the latest revisions of ASME B16.9, ASME B16.28, and MSS-SP-75. Butt-welding fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A 960/A 960M. These fittings are for use in high-pressure gas and oil transmission and distribution systems.
1.2 Optional supplementary requirements are provided for fittings when a greater degree of examination is desired. One or more of the supplementary requirements may be specified in the order.
1.3 This specification does not cover cast-welding fittings or fittings machined from castings.
1.4 The values stated in either inch-pound units or SI 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 this specification. Unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.
2. Referenced Documents
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
A960/A960M Specification for Common Requirements for Wrought Steel Piping Fittings
AWS5.18 Specification for Carbon Steel Metals for Gas Shielded Arc Welding
B16.28 Wrought Steel Buttwelding Short Radius Elbows and Returns
B16.9 Steel Butt-Welding Fittings
MSS SP-25 The Standard Marking System of Valves, Fittings, Flanges and Unions
MSS-SP-75 Specification for High Test Wrought Butt-Welding Fittings
Section IX , Welding and Brazing Qualifications
Section V, Nondestructive Examination
Section VIII, Division 1, Pressure Vessels
SNT-TC-1A Recommended Practice for Nondestructive Testing Personnel Qualification and Certification