Please refer following para of SA-182
5.4 The material shall be forged as close as practicable to the specified shape and size. Except for flanges of any type, forged or rolled bar may be used without additional hot working for small cylindrically shaped parts within the limits defined by Specification A 234/A 234M for low alloy steels and martensitic stainless steels and Specification A 403/A 403M for austenitic and ferritic-austenitic stainless steels. Elbows, return bends, tees, and header tees shall not be machined directly from bar stock.
5.5 Except as provided for in 5.4, the finished product shall be a forging as defined in the Terminology section of Specification A 788.
I suggest to use forged product instead of wrought product.
Definition of steel forging—
The product of a substantially compressive plastic working operation that consolidates the material and produces the desired shape. The plastic working may be performed by a hammer, press, forging machine, ring rolling machine, or forging rolls, and must deform the material to produce an essentially wrought structure.
Definition of wrought fitting—
Fittings made of pipe, tubing, plate or forgings by Forming process or Forging or shaping operations may be performed by hammering, pressing, piercing, extruding,upsetting, rolling, bending, fusion welding, machining, or by a combination of two or more of these operations.
The comparision between wrought product & forged product is as follow.
1) Wrought steel is less likely to be used in high-tension applications and it may be harder and more brittle than forged steel.
2) Forged steel is more durable in certain applications because, although it begins life as a casting as well, it is hammer forged using large hydraulic hammers that force the atoms and molecules of the steel into alignment as they hit it. Wrought steel does not undergo this same process, which makes forged steel harder and less likely to crack when struck. Striking tools and axes are often made of forged steel because they are used to hit things, and the brittle nature of a cast steel would lead them to breaking rapidly if they were not forged.
3) Forged steel may be more fine grained, in part because of the hammer-forging process.
Regards
--Dear All,
Can u explain me difference between wrought fittings and forged fittings? Can I use SA 182 instead of SA 403 or vies versa ? pls reply with code reference or technical reason.
Thanks,
HEMANT SUTHAR
QA/QC
CEPL-SILVASSA
9712973092
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