ASTM A694 /A694M Weldolet

He Bei GuangHao Pipe Fittings Co .,LTD Specializing in the production of steel pipe and pipe fittings
Main production:Heat Preservation Anticorrosive Pipe，Seamless Pipe，ERW/HFW Steel Pipe，LSAW STEEL PIPE，Spiral Tube，Buttweld Steel Pipe Fittings,Industrial Flanges,Steel Pipes,Buttweld  Elbows,Buttwel Tees,Forged fittings,etc.
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 Forged Fittings/Buttweld Steel Pipe Fittings Type: Elbow, cross, street elbow, tee, coupling, half coupling, cap, plug, bushing, union, outlet, sage nipple, bull plug, reducer insert, pipe nipple etc.

               ASTM A694 have several grades from F42 to F70, and each grade is specified based on the minimum yield strength as below table 

The standard available in two units, foot-pound units and International Metric (SI) units. However, the material shall be supplied in feet-pound units unless the ''metric'' code (SI unit) is specified in the order.

Manufacturing process

Melting Process

The steel material under A694 shall adopt one of the following smelting processes: open furnace, electric furnace or oxygen top-blown converter. Moreover, steel should be completely deoxidized.

As agreed by the buyer and manufacturer, the material shall be carbon steel, high strength low alloy steel or alloy steel. Further more, manufacturer shall report the chemical composition of the used material. All the produced products shall be adapted to welded on the pipes of ASTM A53, ASTM A106, ASTM A381, API 5L or the fittings of MSS SP-75.

Manufacturing Practice:

Forging materials include ingots or billets, billets, slabs or forged, rolled rods, and cut to the specified length according to the appropriate process.

Hot working shall be sufficient to develop a wrought structure throughout the part.

Flanges shall not be machined directly from plate nor from solid bar stock.

Heat treatment

All forgings should be heat treated. The heat treatment of carbon steel and high-strength low-alloy steel should be normalized, normalized or tempered or quenched and tempered. The heat treatment of alloy steel is aging treatment with quenching and precipitation or aging treatment with quenching and precipitation.

Tempering temperature shall be at least 1000 ℉ [540 ℃], precipitation heat treatment of alloy steel shall be in range from 1000 to 1225 ℉ [540 ℃ to 665 ℃].

Chemical composition

The smelting analysis shall be carried out in accordance with the provisions of Specification A961, and the results of the analysis shall comply with the chemical composition requirements given in Table 2.

The mechanical properties are tested in accordance with the requirements of Specification A 961. The tensile mechanical properties of the materials are to comply with the requirements of Table 1.

Process quality, precision and appearance