ASME B16.5 ASTM B637 2.4631 LWN RF Flange 3″ 150#

Type:  2.4631 LWN RF Flange
Size: 3″ (DN80)
Class / Pressure: 150#
Standard: ASME B16.5

Material: Nimonic Alloy 80A (UNS N07080/w. Nr.2.4952 & 2.4631)

Alloy 80A (Nimonic® alloy 80A) is a wrought, age-hardenable nickel-chromium alloy. Alloy 80A is similar to alloy 75 but made precipitation hardenable by additions of aluminium and titanium. Alloy 80A has good corrosion and oxidation resistance and high tensile and creep-rupture properties at temperatures to 815ºC (1500ºF). Vacuum refined versions are also available. Alloy 80A is used for gas-turbine components (blades, rings, discs), bolts, tube supports in nuclear generators, exhaust valves in internal combustion engines and has many other offshore/marine, automotive and electrical applications.

CHEMICAL COMPOSITION of NIMONIC alloy 80A (UNS N07080/W. Nr. 2.4952 & 2.4631) 

PHYSICAL PROPERTIES of NIMONIC alloy 80A (UNS N07080/W. Nr. 2.4952 & 2.4631) 

HEAT TREATMENT REQUIREMENTS of NIMONIC alloy 80A (UNS N07080/W. Nr. 2.4952 & 2.4631) 

GRADE	Solution Treatment				Stabilizing Treatment					Precipitation Hardening Treatment
B 637 UNS N07080	1950±25°F [1066±14°C]  hold 8 h, air cool				1560±25°F [849±14°C]  hold 24 h, air cool					1290±25°F [699±14°C], hold 16 h, air cool

MECHANICAL PROPERTIES of NIMONIC alloy 80A (UNS N07080/W. Nr. 2.4952 & 2.4631) 

GRADE	Heat Treatment		Tensile Strength min		Yield Strength (0.2% Offset), min		Elongation in 2 in  [50mm] or 4D min, %	Reduction of Area, min,%	Brinell Hardness	Approximate Rockwel  Hardness, B and C
			psi	MPa	psi	MPa				min	max
B 637 UNS N07080	solution+stabilize+ precipitation harden		135000	930	90000	620	20	–	–	–	–

STREE RUPTURE REQUIREMENTS of NIMONIC alloy 80A (UNS N07080/W. Nr. 2.4952 & 2.4631) 

GRADE	Heat Treatment		Test Temperature		Stress, min		Time to Rupture		Elongation in 2 in  or 50mm (or 4D), min, %
			℉	℃	psi	MPa	min, h
B 637 UNS N07080	solution+stabilize+ precipitation harden		1400	760	47000	325	23		3.5

Spec. No. of NIMONIC alloy 80A (UNS N07080/W. Nr. 2.4952 & 2.4631) 

Rod, Bar, Wire and Forging Stock			BS 3076 & HR 1; ASTM B 637  AECMA PrEn 2188, 2189, 2190, 2396, 2397; AIR 9165-37
Plate, Sheet and Strip			BS HR 201, AECMA PrEn 2191
Pipe and Tube			BS HR 401
Others			BS HR 601, DIN 17742, AFNOR NC 20TA

APPLICATIONS of NIMONIC alloy 80A (UNS N07080/W. Nr. 2.4952 & 2.4631) 

• Gas turbine engines
• Die-casting inserts and cores
• Nuclear steam generators
• Internal-combustion engines

Long Weld neck flange dimensions are covered in ASME B16.5 – which covers Pipe Flanges and Flanged Fittings for size NPS ½” to 24” for above NPS 26” to 60” it should be as per ASME B16.47.

During dimensional inspection of flange, you should check for

• Outer & Inner Diameter of body
• Bolt Circle & Bolt hole Diameter
• Thickness of weld end
• Length of the Hub
• Straightness and alignment of the bolt hole

Class 150 Long Weld Neck Flange Dimensions

Size in Inch	Size in mm	Outer Dia.	Flange Thick.	Hub OD	Weld Neck OD	RF Dia.	RF Height	PCD	Hub Length	No of Bolts	Bolt Size UNC	Machine Bolt Length	RF Stud Length	Hole Size	ISO Stud Size
		A	B	C	D	E	F	G	H
1/2	15	90	9.6	30	21.3	34.9	2	60.3	As Required	4	1/2	50	55	5/8	M14
3/4	20	100	11.2	38	26.7	42.9	2	69.9	As Required	4	1/2	50	65	5/8	M14
1	25	110	12.7	49	33.4	50.8	2	79.4	As Required	4	1/2	55	65	5/8	M14
1 1/4	32	115	14.3	59	42.2	63.5	2	88.9	As Required	4	1/2	55	70	5/8	M14
1 1/2	40	125	15.9	65	48.3	73	2	98.4	As Required	4	1/2	65	70	5/8	M14
2	50	150	17.5	78	60.3	92.1	2	120.7	As Required	4	5/8	70	85	3/4	M16
2 1/2	65	180	20.7	90	73	104.8	2	139.7	As Required	4	5/8	75	90	3/4	M16
3	80	190	22.3	108	88.9	127	2	152.4	As Required	4	5/8	75	90	3/4	M16
3 1/2	90	215	22.3	122	101.6	139.7	2	177.8	As Required	8	5/8	75	90	3/4	M16
4	100	230	22.3	135	114.3	157.2	2	190.5	As Required	8	5/8	75	90	3/4	M16
5	125	255	22.3	164	141.3	185.7	2	215.9	As Required	8	3/4	85	95	7/8	M20
6	150	280	23.9	192	168.3	215.9	2	241.3	As Required	8	3/4	85	100	7/8	M20
8	200	345	27	246	219.1	269.9	2	298.5	As Required	8	3/4	90	110	7/8	M20
10	250	405	28.6	305	273	323.8	2	362	As Required	12	7/8	100	115	1	M24
12	300	485	30.2	365	323.8	381	2	431.8	As Required	12	7/8	100	120	1	M24
14	350	535	33.4	400	355.6	412.8	2	476.3	As Required	12	1	115	135	1 1/8	M27
16	400	595	35	457	406.4	469.9	2	539.8	As Required	16	1	115	135	1 1/8	M27
18	450	635	38.1	505	457.2	533.4	2	577.9	As Required	16	1 1/8	125	145	1 1/4	M30
20	500	700	41.3	559	508	584.2	2	635	As Required	20	1 1/8	140	160	1 1/4	M30
24	600	815	46.1	663	610	692.2	2	749.3	As Required	20	1 1/4	150	170	1 3/8	M33