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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