Low Temperature Carbon Steel LF5 Flanges Manufacturer and Supplier in Houstan, USA

Low Temperature Carbon Steel LF5 Flanges

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Luke Steel is a leading manufacturer and supplier of ASTM A350 LF5 Low-Temperature Carbon Steel Flanges, Houstan, USA. Reputed for offering high-strength steel solutions, the firm caters to those industries that need materials with mechanical strength even under extreme cold temperatures. LF5 flanges by Luke Steel are designed to display superior notch toughness and impact resistance at temperatures as low as -50°F (-46°C). Supported by a strong emphasis on quality, accuracy, and customer satisfaction, Luke Steel has become a reputable brand in the American steel sector, providing dependable products for use at cryogenic and sub-zero temperatures in key sectors.

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LTCS LF5 Blind Flanges

Low Temperature Carbon Steel LF5 Forged Flanges

Carbon Steel LF5 Threaded Flanges

What is Low Temperature Carbon Steel LF5 Flanges?

ASTM A350 LF5 Flanges contain carbon (≤0.30%), manganese (0.60–1.35%), silicon (0.20–0.35%), and nickel (1.00–2.00%) to provide improved cold-weather performance. Other constituents are phosphorus, sulfur, chromium, molybdenum, copper, and columbium as trace elements to improve strength and toughness. The flanges possess 70–95 ksi (485–655 MPa) tensile strength, yield strength of 485–655 MPa, elongation of 37.5%, and maximum hardness of 197 HB. Microstructure optimized through heat treatment, LF5 flanges are resistant to deformation and brittleness under cryogenic temperatures and hence suitable for low-temperature applications.

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Low Temperature Carbon Steel LF5 Flanges Specification

Material : ASTM A350 LF5 CL1/CL2
Size Range: 1/2″ (15 NB) to 48″ (1200NB), ASME B16.47 Flanges size range: 26″ to 60″
Typical manufacturing specifications: A350 LF5 , ASME A350 LF5
Origin: European Origin, Indian Origin, US Origin, Korean Origin, Sweden Origin, USAraine Origin, Japanese Origin Materials
ASME SA350 LF5 LTCS Flanges Manufacturing Dimensions: ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Standard: ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Class / Pressure: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flange Face Type: Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ), LJ, FM , R.T.J , R.J and so on
ANSI ClaASME SA350 LF5 LTCS Flanges: 150 to 2500 Size: 1/2″-24″
AWWA ClaASME SA350 LF5 LTCS Flanges: classes B, D, E, F Size: 3″-144″
ANSI B16.5 ASTM A350 LF5 LTCS Flanges pressure classes: 150, 300, 400, 600, 900, 1500 and 2500 for ASME B16.5
ANSI B16.47 ASTM A350 LF5 LTCS Flanges pressure classes: 75, 150, 300, 400, 600, 900 for ASME B16.47
Specialized in: A350 LF5 SORF, SOFF, BLRF, BLFF, WNRF, WNFF, SWRF, SWFF, Threaded RF, Threaded FF & LJ

Low Temperature Carbon Steel LF5 Flanges Chemical Composition

Element	Composition, w.t % Grades
	LF5
C	≤0.30
Mn	0.60-1.35
P	≤0.035
S	≤0.040
Si	0.20-0.35
Ni	1.00-2.00
Cr	≤0.30
Mo	≤0.12
Cu	≤0.40
Cb	≤0.02

LTCS LF5 Flanges Mechanical Properties

Grade/Class	Tensile Strength		Yield Strength, min.		Elongation, min.	Hardness, max.
LF5	70–95	485–655	37.5	260	22	197

If You Are Looking To Buy High Quality Pipes, Sheet, Fittings and Flanges

We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.

Top Manufacturer and Supplier of Low Temperature Carbon Steel LF5 Flanges in Houstan, USA

Luke Steel is one of the most prominent manufacturers and suppliers of superior quality Low Temperature Carbon Steel LF5 Flanges in Houstan, USA. As experts in steel solutions, we supply a complete spectrum of products like Carbon Steel, Alloy Steel, Mild Steel, and Galvanized Steel. Our product range comprises Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets, and Plates. Known for our reliable delivery and first-rate customer service, we are committed to supplying high-quality steel materials that guarantee durability and excellent performance in numerous industrial applications.

A350 LF5 Pressure Rating Chart

ASME/ANSI B 16.5	LTCS A350 LF5 Welding Neck Flange, LTCS A350 LF5 Slip on Flange, Blind Flange, High Hub Blind Flange, Socket Weld Flange, LTCS A350 LF5 Lap Joint Flange, Threaded Flange, LTCS A350 LF5 Ring Type Joint Flange
PRESSURE CLASS	150, 300, 400, 600, 900, 1500, 2500
ASME/ANSI B 16.47	LTCS A350 LF5 Welding Neck Flange, LTCS A350 LF5 Blind Flange [Series A & B]
PRESSURE CLASS	75, 150, 300, 400, 600, 900
ASME/ANSI B 16.36	LTCS A350 LF5 Welding Neck Flange, LTCS A350 LF5 Slip on Flange, LTCS A350 LF5 Threaded Flange
PRESSURE CLASS	300, 400, 600, 900, 1500, 2500
BS 4504 SEC 3.1	LTCS A350 LF5 Welding Neck Flange, LTCS A350 LF5 Hubbed Slip on Flange, LTCS A350 LF5 Hubbed Threaded Flange, Lapped Pipe End Flange, LTCS A350 LF5 Plate Flange, Loose Plate Flange, Loose Plate With Weld Neck Flange, Blank Flange
PRESSURE CLASS	PN 2.5 TO PN 40
BS 4504[PART 1]	LTCS A350 LF5 Welding Neck Flange, LTCS A350 LF5 Hubbed Slip-On Hubbed Threaded, Plate Flange, LTCS A350 LF5 Loose Plate With Weld On Plate Collar, Blank Flange
PRESSURE CLASS	PN 2.5 TO PN 400
BS 1560 BOSS	LTCS A350 LF5 Welding Neck Flange, Socket Welding Flange, LTCS A350 LF5 Slip-On Flange, LTCS A350 LF5 Blind Flange, LTCS A350 LF5 Screwed Boss Flange, LTCS A350 LF5 Lapped Flange
PRESSURE CLASS	150, 300, 400, 600, 900, 1500, 2500
BS10	LTCS A350 LF5 Welding Neck Flange, LTCS A350 LF5 Plate Slip-On Flange, LTCS A350 LF5 Screwed Boss Flange, Slip-On Boss Flange, LTCS A350 LF5 Blind Flange
TABLE	D, E, F, H
DIN FLANGES	DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673
PRESSURE CLASS	PN 6 TO PN 100

Low Temperature Carbon Steel LF5 Flange Dimensions

NPS	O.D. of Flange	Flanges Thickness	Diameter of RF	Diameter of Hub at Base	Lengtd Tdru Hub			Bore or Diameter		Dia. of Hub at Bevel	Radius of Fillet	Deptd of Socket
	O.D. of Flange	Flanges Thickness	Diameter of RF	Diameter of Hub at Base	Welding (WN) Neck	Slip-On (SORF) Threaded (NPT) Socket (SWRF)	Lap Joint (Loose)	Slip-on (SORF) Socket (SWRF)	Lap Joint (Loose)	Dia. of Hub at Bevel	Radius of Fillet	Deptd of Socket
	O	Q	R	X	Y	Y	Y	W	B	H	r	Z
1/2	3-1/2	7/16	1-3/8	1-3/16	1-7/8	5/8	5/8	.88	.90	.84	1/8	3/8
3/4	3-7/8	1/2	1-11/16	1-1/2	2-1/16	5/8	5/8	1.09	1.11	1.05	1/8	7/16
1	4-1/4	9/16	2	1-15/16	2-3/16	11/16	11/16	1.36	1.38	1.32	1/8	1/2
1-1/4	4-5/8	5/8	2-1/2	2-5/16	2-1/4	13/16	13/16	1.70	1.72	1.66	3/16	9/16
1-1/2	5	11/16	2-7/8	2-9/16	2-7/16	7/8	7/8	1.95	1.97	1.90	1/4	5/8
2	6	3/4	3-5/8	3-1/16	2-1/2	1	1	2.44	2.46	2.38	5/16	11/16
2-1/2	7	7/8	4-1/8	3-9/16	2-3/4	1-1/8	1-1/8	2.94	2.97	2.88	5/16	3/4
3	7-1/2	15/16	5	4-1/4	2-3/4	1-3/16	1-3/16	3.57	3.60	3.50	3/8	13/16
3-1/2	8-1/2	15/16	5-1/2	4-13/16	2-13/16	1-1/4	1-1/4	4.07	4.10	4.00	3/8	7/8
4	9	15/16	6-3/16	5-5/16	3	1-5/16	1-5/16	4.57	4.60	4.50	7/16	15/16
5	10	15/16	7.5/16	6-7/16	3-1/2	1-7/16	1-7/16	5.66	5.69	5.56	7/16	15/16
6	11	1	8-1/2	7-9/16	3-1/2	1-9/16	1-9/16	6.72	6.75	6.63	1/2	1-1/16
8	13-1/2	1-1/8	10-5/8	9-11/16	4	1-3/4	1-3/4	8.72	8.75	8.63	1/2	1-1/4
10	16	1-3/16	12-3/4	12	4	1-15/16	1-15/16	10.88	10.92	10.75	1/2	1-5/16
12	19	1-1/4	15	14-3/8	4-1/2	2-3/16	2-3/16	12.88	12.92	12.75	1/2	1-9/16
14	21	1-3/8	16-1/4	15-3/4	5	2-1/4	3-1/8	14.14	14.18	14.00	1/2	1-5/8
16	23-1/2	1-7/16	18-1/2	18	5	2-1/2	3-7/16	16.16	16.19	16.00	1/2	1-3/4
18	25	1-9/16	21	19-7/8	5-1/2	2-11/16	3-13/16	18.18	18.lf2	18.00	1/2	1-15/16
lf2	27-1/2	1-11/16	23	22	5-11/16	2-7/8	4-1/16	lf2.lf2	lf2.25	lf2.00	1/2	2-1/8
24	32	1-7/8	27-1/4	26-1/8	6	3-1/4	4-3/8	24.25	24.25	24.00	1/2	2-1/2

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Types of Low Temperature Carbon Steel LF5 Flanges

Carbon Steel LF5 Flange Weight Chart

Nominal Pipe Sizes (NPS)	Slip On (SORF)	Threaded (NPT)	Socket Weld (SWRF)	Lap Joint (Loose)	Blind (BLRF)	Weld Neck (WRNR)
½	1	1	2	1	2	2
¾	2	2	2	2	2	2
1	2	2	2	2	2	3
1¼	3	3	3	3	3	3
1½	3	3	3	3	4	4
2	5	5	5	5	5	6
2½	8	8	8	8	7	10
3	9	9	9	9	9	11.5
3½	11	12	11	11	13	12
4	13	13	13	13	17	16.5
5	15	15	15	15	lf2	21
6	19	19	19	19	27	26
8	30	30	30	30	47	42
10	43	43	43	43	70	54
12	64	64	64	64	123	88
14	90	90	90	105	140	114
16	106	98	98	140	180	140
18	130	130	130	160	2lf2	165
lf2	165	165	165	195	285	197
22	185	185	185	245	355	225
24	2lf2	2lf2	2lf2	275	430	268

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Uses of Low Temperature Carbon Steel LF5 Flanges

ASTM A350 LF5 Low-Temperature Carbon Steel Flanges find extensive application in processes where the materials are under freezing or cryogenic conditions. Major applications cover heat exchangers, condensers, and piping systems in the oil and gas industries, especially in offshore drilling units and LNG liquefaction plants. Flanges are also widely used in power generation, chemical processing, and petrochemical industries where consistent performance under thermal stress is critical. Their higher strength, ductility, and cold impact resistance provide safe and reliable connections in critical applications and high-pressure conditions.