ASME B16.5 ASTM B564 UNS N04400 LWN RTJ Flange 2″ 600#

Type: UNS N04400 LWN Flange
Material: Monel 400 (UNS N04400/Alloy 2.4360)
Size: 2″ (DN50)
Class / Pressure: 300#
Standard: ASME B16.5
Flange Faces: Ring Type Joint (RTJ)

Long weld neck flange (LWN flange) is also call integral flange, it means a welding neck flange has a very long neck. Commonly, the welding neck flange has a tapered neck and a bevel end which is going to butt welding with the matching pipe. But the long weld neck flange, has a straight short pipe as the neck of a long weld neck flange. Long weld neck flange (LWN flange), is used for high pressure situations, integral hub weld neck flanges are used and for very high pressure cases Long Welding Neck flanges are preferred. In this case, the weld are far from the ring to avoid bending stresses and weld stress being combined.

A Ring Type Joint Flange is a type of flange that uses a metal ring that sits in a hexagonal groove as a gasket to seal the flange pair. The flanges seal when the bolts are tightened and the gasket is compressed into the groove making a metal to metal seal. An RTJ flange usually has a raised face with the groove machined into the face of the flange. The raised face doesn’t serve as a way to contain the pressure.

Dimensions and weights of Class 600 Long Weld Neck Flange

SIZE		FLANGE			BARREL	BOLTING			Raised	LENGHTH	WEIGHT
									Face Dia.	L
Nom	Unit	Bore	OD	Thk	OD	No. OF	Hole	Bolt	R		POUND
						Holes	Size	Circle			KILO
		B	O	T	D			C
1/2″	mm	12,7	95,3	14,2	38,1	4	15,7	66,5	34,9	228,6	5
	inches	0,50	3,75	0,56	1,50		0,62	2,62	1,38	9,00	2,27
3/4	mm	19,1	117,3	15,7	47,8	4	19,1	82,6	42,9	228,6	8
	inches	0,75	4,62	0,62	1,88		0,75	3,25	1,69	9,00	3,63
1	mm	25,4	124,0	17,5	53,8	4	19,1	88,9	50,8	228,6	9
	inches	1,00	4,88	0,69	2,12		0,75	3,50	2,00	9,00	4,08
1 1/4	mm	31,8	133,4	20,6	63,5	4	19,1	98,6	63,5	228,6	13
	inches	1,25	5,25	0,81	2,50		0,75	3,88	2,50	9,00	5,09
1 1/2	mm	38,1	155,4	22,4	69,9	4	22,4	114,3	73,0	228,6	16
	inches	1,50	6,12	0,88	2,75		0,88	4,50	2,88	9,00	7,26
2	mm	50,8	165,1	25,4	84,1	8	19,1	127,0	92,1	228,6	20
	inches	2,00	6,50	1,00	3,31		0,75	5,00	3,63	9,00	9,08
2 1/2	mm	63,5	190,5	28,4	100,1	8	22,4	149,4	104,8	228,6	27
	inches	2,50	7,50	1,12	3,94		0,88	5,88	4,13	9,00	12,25
3	mm	76,2	209,6	31,8	117,3	8	22,4	168,1	127,0	228,6	36
	inches	3,00	8,25	1,25	4,62		0,88	6,62	5,00	9,00	16,34
4	mm	101,6	273,1	38,1	152,4	8	25,4	215,9	157,2	304,8	77
	inches	4,00	10,75	1,50	6,00		1,00	8,50	6,19	12,00	34,95
5	mm	127,0	330,2	44,5	190,5	8	28,4	266,7	185,7	304,8	123
	inches	5,00	13,00	1,75	7,50		1,12	10,50	7,31	12,00	55,84
6	mm	152,4	355,6	47,8	222,3	12	22,4	292,1	215,9	304,8	152
	inches	6,00	14,00	1,88	8,75		0,88	11,50	8,50	12,00	69,08
8	mm	203,2	419,1	55,6	273,1	12	31,8	349,3	269,9	304,8	207
	inches	8,00	16,50	2,19	10,75		1,25	13,75	10,63	12,00	93,97
10	mm	254,0	508,0	63,5	342,9	16	35,1	431,8	323,9	304,8	324
	inches	10,00	20,0	2,50	13,50		1,38	17,00	12,75	12,00	147,09
12	mm	304,8	558,8	66,5	400,1	20	35,1	489,0	381,0	304,8	393
	inches	12,00	22,00	2,62	15,75		1,38	19,25	15,00	12,00	178,42
14	mm	355,6	603,3	69,9	431,8	20	38,1	527,1	412,8	406,4	471
	inches	14,00	23,75	2,75	17,00		1,50	20,75	16,25	16,00	213,83
16	mm	406,4	685,8	76,2	495,3	20	41,1	603,3	469,9	406,4	638
	inches	16,00	27,00	3,00	19,50		1,62	23,75	18,50	16,00	289,65
18	mm	457,2	743,0	82,6	546,1	20	44,5	654,1	533,4	406,4	731
	inches	18,00	29,25	3,25	21,50		1,75	25,75	21,00	16,00	331,42
20	mm	508,0	812,8	89,9	609,6	24	44,5	723,9	584,2	406,4	916
	inches	20,00	32,00	3,50	24,00		1,75	28,50	23,00	16,00	415,86
24	mm	609,6	939,8	101,6	717,6	24	50,8	838,2	692,2	406,4	1210
	inches	24,00	37,00	4,00	28,25		2,00	33,00	27,25	16,00	549,34

Chemical Composition of Alloy 400 (UNS N04400/Alloy 2.4360)

Alloy	%	Ni	Cu	Fe	C	Mn	Si	S
Monel 400	Min.	63	28
UNS N04400	Max.		34	2.5	0.3	2	0.5	0.024

Equivalent Specifications of Alloy 400 (UNS N04400/Alloy 2.4360)

Country	Body	Grade
USA	UNS	N04400
France	AFNOR	NU30
GB	BS	NA13
Germany	DIN	2.4360, 2.4361

Specifications of Alloy 400 (UNS N04400/Alloy 2.4360)

Specification	Title
B163	Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes
B366	Factory-Made Wrought Nickel and Nickel Alloy Fittings
B564	Nickel Alloy Forgings
B127	Nickel-Copper Alloy (UNS N04400) Plate, Sheet, and Strip
B164	Nickel-Copper Alloy Rod, Bar, and Wire
B165	Nickel-Copper Alloy (UNS N04400) Seamless Pipe and Tube
B725	Welded Nickel (UNS N02200/UNS N02201) and Nickel Copper Alloy (UNS N04400) Pipe
B730	Welded Nickel (UNS N02200/UNS N02201) and Nickel Copper Alloy (UNS N04400) Tube

Mechanical Properties of Alloy 400 (UNS N04400/Alloy 2.4360)

Product	0.2% Proof Stress	Tensile Strength	Elongation
	MPa	MPa	%
As Hot Rolled	275	515	25
Annealed	195	485	35
Hard	620	690	2

Physical Properties of Alloy 400 (UNS N04400/Alloy 2.4360)

Property	Metric Units
Melting Range	1300-1350°C
Density	8,800 kg/m³ @ 20°C
Coefficient of Thermal Expansion	13.9 x 10 -6 / °C (20°C)
Curie Temperature	20-50°C
Themal Conductivity	21.8 W/m. °C @ 20°C
Thermal Capacity (Specific Heat)	427 J/kg. °C @ 20°C
Electrical Conductivity	32 % IACS
Electrical Resistivity	0.547 microhm.m @ 20°C
Modulus of Elasticity (tension)	179 GPa @ 20°C
Modulus of Rigidity (torsion)	65.5 GPa @ 20°C
Poisson’s Ratio	0.32

Corrosion Resistance

Monel 400 is generally more corrosion resistant that both of the major constituents nickel and copper. It is highly resistant to chlorinated solvents, glass etching agents, sulphuric, hydrofluoric and many other acids, and practically all alkalies. The alloy gives excellent service in sea water under high velocity conditions, where resistance to cavitation and erosion are important. Corrosion rates in strongly agitated and aerated sea water are extremely low. It is generally free from chloride stress corrosion cracking, but only annealed material resists stress cracking in the presence of mercury or mercury salts, and in moist, aerated hydrofluoric acid vapour. It should not be used for nitric acid service. Please consult Austral Wright Metals for specific advice on your application.

Pressure Vessels

AS1210 & ASME Boiler & Pressure Vessel Code pre-qualify Monel 400 for use in pressure vessels up to about 475°C.

Fabrication

Monel 400 can be readily hot worked, with lower forces than many steels. The alloy can easily be cold formed, with forces between those of carbon steel and grade 304 stainless steel.

Machinability

Monel 400 is easy to machine (class B). Sharp tools, slow speeds and deep uninterrupted cuts to remove the work hardened layer are needed. Monel R-405 is a free cutting version of Monel 400, for rapid production in automatic screw machines. Toughness, strength and corrosion resistance are very similar to Monel 400.

Weldability

Monel 400 is readily welded by GMAW (MIG), GTAW (TIG), SMAW (manual) and SAW processes. Preheat, post heat and post weld heat treatment are not required. The area around the weld must be clean to prevent contamination of the weld pool. Argon shielding gas is used.

Heat Treatment

Monel 400 is annealed at 870–980°C, cooling rate not critical. Grain growth is rapid in this alloy, so use the lower end of the temperature range and minimal time to retain good strength. Stress relief, if required, is at 540-570°C. Stress equalising cold worked material at 300°C markedly increases the proof stress, without affecting other properties.

Applications

The MONEL 400 alloy is used in the following applications:

• Marine fixtures, pumps, valves and piping systems for sea water applications;
• Chemical plant equipment;
• Frames for eyeglasses;
• Aerospace applications;
• Musical instruments.

Filler Metal Selection

	Normal Service	Higher Strength	Best Corrosion Resistance
Welding Electrode	Monel WE 190	Monel WE 190	Monel WE 190
Filler Metal	Monel FM 60	Monel FM 60	Monel FM 60
Flux Cored Wire	–	Inco-Cored 82DH	–