ASTM A182 Standard

A182 Stainlesss Forged Fittings

ASTM A182 specification covers forged low alloy and stainless steel piping components for use in pressure system. Included are flanges, fittings, valves, and similar parts to specified dimensional standards.

For bars and products machined directly from bar (other than those directly addressed by this specification; see 6.4), refer to specifications A479/A479 M and A739 for the similar grades available in those specifications. Products made to this specification are limited to a maximum weight of 10000 lb [4540 kg]. For larger products for other application, refer to specifications A336/A336M and A965/A965M for the similar ferritic and austenitic grades, respectively, available in those specifications.

Several grades of low alloy steels and ferritic, martensitic, austenitic, and ferritic-austenitic stainless steels are included in this specification. Selection will depend upon design and service requirements. Several of the ferritic/austenitic (duplex) grades are also found in specification A1049/A1049M.

Chemical Composition (%) of ASTM A182
Symbol C Mn P S Si Ni Cr Mo
F304 0.08 2 0.045 0.03 1 8.0-11.0 18.0-20.0 _
F304L 0.03 2 0.045 0.03 1 8.0-13.0 18.0-20.0 _
F316 0.08 2 0.045 0.03 1 10.0-14.0 16.0-18.0 2.00-3.00
F316L 0.03 2 0.045 0.03 1 10.0-15.0 16.0-18.0 2.00-3.00
F321 0.08 2 0.045 0.03 1 9.0-12.0 17.0-19.0 _
Mechanical Properties of ASTM A182
Material Symbol Tensile Strength
min, MPa
Yield point
min, Mpa
Elongation
min, %
Reduction of area
min, %
ASTM A182 F304 515 205 30 50
ASTM A182 F304L 485 170 30 50
ASTM A182 F316 515 205 30 50
ASTM A182 F316L 485 170 30 50
ASTM A182 F321 515 205 30 50
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