Material Grade of ASTM A182 Forged Flanges

ASTM A182 forged flanges are a flange product that complies with the ASTM A182 standard established by the American Society for Testing and Materials (ASTM).

What is ASTM A182 Standard

ASTM A182 standard applies to forged low alloy steel and stainless steel pipe parts for use in pressure systems. These include flanges, fittings, valves and similar parts that meet specified size or size standards. And it includes several grades of low carbon alloy steel and ferritic, martensitic, austenitic and ferritic-austenitic stainless steels.

ASTM A182 is an international standard for forged stainless steel flanges and fittings. This standard was developed to ensure reliability in systems operating under high temperature and pressure.

Temperature ranges are also an important factor. Parts manufactured in accordance with ASTM A182 can generally function between -425°F and 1200°F.

Material Grade of ASTM A182 Forged Flange

ASTM A182 standard for forged flange materials includes two types of materials: alloy steel and stainless steel.

Alloy Steel Forged Flange

Common alloy flange materials include: ASTM A182 F5, F9, F91, F92, F11, F12, F21, F22 etc.

Alloy steel flanges are made for different steel alloys material. The flanges has various dimensions and pressures. There are 1/2 inches through 60 inches of nominal diameter sizes of flanges.

Chemical Properties

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A182 F5	MIN		0.30					4.00	0.44
	MAX	0.15	0.60	0.030	0.030	0.50	0.50	6.00	0.65
ASTM A182 F9	MIN		0.30			0.50		8.00	0.90
	MAX	0.15	0.60	0.030	0.030	1.00		10.00	1.10
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 F12 CL2	MIN	0.10	0.30			0.10		0.80	0.44
	MAX	0.20	0.80	0.40	0.40	0.60		1.25	0.65
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 F11 CL2	MIN	0.10	0.30			0.50		1.00	0.44
	MAX	0.20	0.80	0.04	0.04	1.00		1.50	0.65
ASTM A182 F11 CL3	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

Mechanical Properties

MATERIAL	ASTM A182 F5	ASTM A182 F9	ASTM A182 F12 CL1	ASTM A182 F12 CL2	ASTM A182 F11 CL1	ASTM A182 F11 CL2	ASTM A182 F11 CL3
T.S (MPA)	485 min	585 min	415 min	485 min	415 min	485 min	515 min
Y.S (MPA)	275 min	380 min	220 min	275 min	205 min	275 min	310 min
EL %	20 min	20 min	20 min	20 min	20 min	20 min	20 min
R/A %	35 min	40 min	45 min	30 min	45 min	30 min	30 min
HARDNESS	143-217	179-217	121-174	143-207	121-174	143-207	150-207

ASTM A182 Stainless Steel Forged Flange

Common alloy flange materials include: ASTM A182 F304,F316,F44,F51,F53etc.

Chemical Properties

CHEMICAL	LIMITS	C	Mn	P	S	Si	Ni	Cr	Mo	N	Cu
ASTM A182 F304	MIN						8.0	18.0
	MAX	0.08	2.00	0.045	0.030	1.00	11.0	20.0		0.10
ASTM A182 F316	MIN						10.0	16.0	2.00
	MAX	0.08	2.00	0.045	0.030	1.00	14.0	18.0	3.00	0.01
ASTM A182 F44	MIN						17.50	19.50	6.00		0.50
	MAX	0.02	1.00	0.030	0.010	0.80	18.50	20.50	6.50		1.00
ASTM A182 F51	MIN						4.50	21.00	2.50	0.08
	MAX	0.03	2.00	0.030	0.020	1.00	6.50	23.00	3.50	0.20
ASTM A182 F53	MIN						6.00	24.00	3.00	0.24
	MAX	0.03	1.20	0.035	0.020	0.80	8.00	26.00	5.00	0.32	0.5

Mechanical Properties

MATERIAL	ASTM A182 F304	ASTM A182 F316	ASTM A182 F44	ASTM A182 F51	ASTM A182 F53
T.S (MPA)	515 min	515 min	650 min	620 min	800 min
Y.S (MPA)	205 min	205 min	300 min	450 min	550 min
EL %	30 min	30 min	35 min	35 min	25 min
R/A %	50 min	50 min	50 min	45 min	15 min
HARDNESS					310 max

Stainless steel flanges are important components preferred in many industries. The biggest advantage of these flanges is their high corrosion resistance. Thanks to its stainless steel material, it exhibits long-lasting performance in humid and aggressive environments.

Alloy Steel VS Stainless Steel Flanges

Corrosion resistance: Stainless steel flanges have added more nickel and chromium elements to improve their corrosion resistance;

Mechanical Properties: Alloy flanges have high strength and toughness, and can withstand large working pressures and mechanical stresses.

Weldability: Alloy flanges have good weldability and can be easily connected by welding.

Cost and maintenance: Stainless steel flanges are more cost-effective than alloy flanges due to their corrosion resistance and durability, making them suitable for long-term use.

ZIZI Flange is a leading supplier of the ASTM A182 Alloy Steel flanges as well as the other types of alloys.

Application of Forged Flanges

Oil and Gas

Food Processing

Equipment

Pipeline

Power Industries

Ship Building

Chemical Industries

December 2, 2024