A350 Lf2 Lf3 Lf6 Lf9 Carbon Steel Long Weld Neck Flange

• Customization: Available
• Standard: ANSI, DIN, GB, JIS, GOST
• Type: Welding Flange
• Structure: Round
• Connection: Welding
• Sealing Surface: RF
• Manufacturing Way: Forging
• Working Pressure: 150-900lb
• Lead Time: 10days
• MOQ: 10PCS
• Quality: 100% Ut Passed
• Transport Package: Wooden Case
• Specification: 1/2" TO 48"
• Trademark: KINGMETAL
• Origin: China
• HS Code: 73079100
• Production Capacity: 1000 Tons Per Month

Product Description

A350 Lf2 Lf3 Lf6 Lf9 Carbon Steel Long Weld Neck Flange 

ASTM A350 is the standard specification covering carbon and low-alloy steel forged or ring-rolled flanges, forged fittings and valves intended primarily for low-temperature service and requiring notch toughness testing. They are manufactured to corresponding ASME or API dimensional standards. The forgings may be made from ingots, blooms, billets, slabs or bars through hot-forging process. The steel shall be fully killed and fine-grain. ASTM A350 covers several grades and classes: Grade LF1, Grade LF2, Grade LF3, Grade LF5, Grade LF6, Grade LF9, Grade LF787; and Class 1, Class 2, Class 3. All the forgings supplied by Metals-Piping will be ultrasonically tested.

 

In ASTM A350 standard,there are 7 different steel grades,LF1,LF2,LF3,LF5,LF6,LF9,LF787.ASTM A350 LF2 forged steel flange is the most widely used material in the low temperature pipeline system.

ASTM A350 Grade LF2 is a general carbon steel usually supplied in the Normalised,Normalised and Tempered or Quench and Tempered condition.It is typified by having moderate strength and impact toughness and is used extensively for the manufacture of flanges and fittings,and applications which require cold temperature service where corrosion resistance is not important.

Dimensions : ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Size : 1/2″ (15 NB) to 48″ (1200NB)
Class : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16, 25, 40 Etc.
DIN : DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629,
DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636,DIN2637, DIN2638, DIN2673
BS : BS4504 , BS4504, BS1560, BS10
Flange Face Type : Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

 Chemical Composition

Grade	C%	Mn%	Si%	S%	P%	Cr%	Ni%
LF1	0.30 max	0.6/1.35	.15/.30	.040 max	.035 max	0.30 max	0.40 max
Lf2	0.30 max	0.6/1.35	.15/.30	.040 max	.035 max	0.30 max	0.40 max
LF3	0.20 max	0.90	.20/.35	.040 max	.035 max	0.30 max	3.3/3.7

 Mechanical Properties 

PROPERTIES	Imperial
TS Min psi (Mpa)	70,000 (485)
YS Min psi (Mpa)	36,000 (250)
EL (2″ Min)	22%
RA Min	30%
Hardness, Bhn	Max 197
-50ºF Charpy	Min Impact
Energy F t/Lb (J):-
Set of 3 Specimen*	15 (20)
For One Specimen	12 (16)