ASTM A182 forged fittings refer to pipe fittings forged from alloy, stainless steel, or duplex steel materials. This standard covers multiple material grades for manufacturing alloy and stainless steel forged fittings to meet different usage environments and engineering requirements.

ASTM A182 forged fittings are a high-quality and high-performance pipeline connector widely used in industries such as petroleum, natural gas, chemical, and power that require high temperature and high pressure resistance in pipeline systems.

ASTM A182 Forged Fittings Specification

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

Standard	ASME B16.11
Size Range	1/8″ to 4″
Pressure Rating	Class 2000LBS,3000LBS, 6000Lbs, 9000lbs.
Alloy Steel	ASTM A182 F11 / 12 / 22 / 5 / 9 / 91 / 92 / 22
Stainless Steel	ASTM A182 F304 / 304L / 304H, 316 / 316L, 321, 310S, 317, 347, 904L
Duplex Stainless Steel	ASTM A182 F51, F53, F44

ASTM A182 Forged Fittings Chemical Composition

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N
ASTM A182 F11 CL1	MIN	0.05	0.30			0.50		1.00	0.44
	MAX	0.15	0.60	0.03	0.03	1.00		1.50	0.65
ASTM A182 F12 CL1	MIN	0.05	0.30					0.80	0.44
	MAX	0.15	0.60	0.45	0.45	0.50		1.25	0.65
ASTM A182 F304	MIN						8	18
	MAX	0.08	2	0.045	0.03	1	11	20		0.1
ASTM A182 F316	MIN						10	16	2
	MAX	0.08	2	0.045	0.03	1	14	18	3	0.01
ASTM A182 F51	MIN						4.5	21	2.5	0.08
	MAX	0.03	2	0.03	0.02	1	6.5	23	3.5	0.2
ASTM A182 F53	MIN						6	24	3	0.24
	MAX	0.03	1.2	0.035	0.02	0.8	8	26	5	0.32
ASTM F55	MIN						6	24	3	0.2
	MAX	0.03	1	0.03	0.01	1	8	26	4	0.3

ASTM A182 Mechanical Property

MATERIAL	ASTM A182 F11 CL1	ASTM A182 F12 CL1	ASTM A182 F304	ASTM A182 F316	ASTM A182 F51	ASTM A182 F53	ASTM A182 F55
T.S (MPA)	415 min	415 min	515 min	515 min	620 min	800 min	750-895
Y.S (MPA)	205 min	220 min	205 min	205 min	450 min	550 min	550min
EL %	20 min	20 min	30 min	30 min	25 min	25 min	25min
R/A %	45 min	45 min	50 min	50 min	45 min	15 min	45min

Types of Forged Fittings

ASTM A182 forged fittings are mainly divided into two categories: socket weld and threaded fittings.

Socket Weld Fittings

Socket weld fittings are a type of pipe connection, consisting of a socket and a spigot. The socket is the part of the forged fittings that receives the spigot of another pipe fitting, and the spigot is the part of the pipe fitting that is inserted into the socket. Its outer diameter is slightly smaller than the inner diameter of the socket so that it can be inserted smoothly.

Socket weld fittings include:

Threaded Fittings

Threaded fittings are fittings with threads, which are connected to other pipe fittings, valves or equipment through threaded connection. Threaded connection is a detachable connection method, which uses the internal or external threads on the forged fittings to achieve connection and sealing through the screwing of threads.

ASTM A182 Threaded fittings include: