High Temperature Nickel Alloy Seamless Pipe DN 76x3 mm HN78T XH78T KHN78T TU 14-3-520-76

• Customization: Available
• Application: Aviation, Electronics, Industrial, Medical, Chemical
• Standard: JIS, GB, DIN, BS, ASTM, AISI
• Model NO.: TU 14-3-520-76 XH78T
• Purity: 78%
• Alloy: Alloy
• Type: Nickel Pipe
• Powder: Not Powder
• Technique: Cold Drawn/Cold Rolled
• Surface Treatment: Annealed Pickled, Bright Annealed
• Section Shape: Round
• Size: 76x3 mm
• Delivery condition: Heat treatment
• Transport Package: Bundles/Wooden Box
• Specification: XH78T GH3030
• Trademark: GH-STEEL
• Origin: China
• HS Code: 75052200
• Production Capacity: 1000ton Per Month

Product Description

This grade HN78T XH78T is manufactured with a help of open-type remelt method. This alloy is widely used in industries for manufacturing floating details that are exploited at a temperature range of 1000−1100°C (f. e. in manufacturing of flame tubes, thermocouple cases, combustion chambers etc.) International analogous grades of alloy are marked as 2.4951NiCr20Ti (Germany), GH3030 (PR China). Alloy has main types of mill-products: tube, wire, strip, sheet, rod. Due to high nickel content, it relates to a group of heat-resisting materials. Its main demerit is non-stability to environments that contain sulphur. It causes a brittle behavior. Its oxidation rate is 0,2 mm/h up to a temperature of 1100 °C.

1. Material	Steel Grade	GH3030  KhN78T  XH78T ЭИ435 Nimonic75
	Production Process	Available in cold rolled and cold drawn
	Standard	GB/T-15062  TU 14-3-520-76  ASTM B829 / ASME SB829
2. Specification of Seamless Pipe	Diameter	3mm thru 273mm
	Thickness	0.5mm-10mm
	Length	2m-12m, or customer required
3.Heat-treated Condition	Annealing, Bright Annealing
4. Application	Aerospace field: GH3030 XH78T high-temperature alloy can be used to manufacture engines, turbine blades, combustion chambers, and other high-temperature components. Chemical industry: GH3030 XH78T high-temperature alloy can be used to manufacture chemical reactors, catalyst carriers, and other high-temperature corrosive environment components. Power field: GH3030 XH78T high-temperature alloy can be used to manufacture power station boilers, heat exchangers, and other high-temperature environment components.
5. Packing	*All of our nickel alloy seamless pipes and tubes are packaged according to international standards to prevent any possible damage or loss. By default, we will use thick woven plastic bags to bundle the finished pipes together in batches. For some special pipes and tubes that are vulnerable to dirt, scratches, stress, or rough handling, we will suggest using wooden cases for protection. Please note that wooden cases may incur extra costs not only for the case itself but also for increased freight costs, especially when using air transportation. To enhance customer experience, we also provide dedicated packaging according to your specific requirements."
6. Delivery Time	1.for ready stock :7 days after receiving the deposit of T/T 2.For MTO: 35 days after receiving the  deposit of T/T
7. Trade Terms	EXW,FOB, CFR, CIF etc.
8. Payment Terms	1.30%T/T in advance, the balance against the B/L copy 2.30%T/T in advance, the balance against the L/C at sight
9. Loading Port	Ningbo/Wenzhou/Shanghai

GH3030 alloy is a Ni-Cr-based solid solution strengthened deformation superalloy, with a service temperature below 800°C. This alloy exhibits excellent thermal strength, high plasticity, and good resistance to both cold and hot fatigue, oxidation, and thermal cycling. Additionally, it demonstrates favorable cold stamping and welding processability. After solution treatment, the alloy forms a single-phase austenitic microstructure, which remains stable during service. It is primarily used for manufacturing turbine engine combustion chamber components operating below 800°C, as well as high-temperature components requiring oxidation resistance under low mechanical loads, up to 1100°C. Common product forms include cold-rolled sheets, bars, rings, wires, and tubes. GH3030 has been widely applied in the fabrication of aerospace engine combustion chambers, afterburners, and casing mounting flanges. The alloy also possesses excellent weldability and can be joined using methods such as argon arc welding, spot welding, seam welding, or brazing. If the solution treatment temperature is insufficient during production, residual carbides may lead to the retention of prior grain boundary structures.

GH3030 is a high-temperature alloy that belongs to the family of nickel-based superalloys. It is commonly referred to as Alloy 3030 or Inconel 3030. The alloy primarily consists of nickel (approximately 55%), chromium (around 19%), and iron (approximately 18%), along with trace amounts of other elements, including cobalt, molybdenum, and aluminum.
GH3030 exhibits excellent high-temperature strength, oxidation resistance, and creep resistance, which make it well-suited for use in extreme environments. It is widely applied in industries such as aerospace, gas turbine manufacturing, chemical processing, and nuclear energy. This alloy maintains its mechanical properties at elevated temperatures and demonstrates good corrosion resistance across a range of corrosive media.
GH3030 alloy possesses several key properties and characteristics, including:
• High-temperature strength: GH3030 maintains its strength and structural integrity under elevated temperatures, making it suitable for applications requiring critical heat resistance.
• Oxidation resistance: The chromium content in GH3030 offers excellent resistance to oxidation, thereby protecting the alloy in high-temperature environments.
• Creep resistance: GH3030 demonstrates good resistance to creep deformation, which refers to the gradual deformation that occurs under sustained load over time at elevated temperatures.
• Corrosion resistance: This alloy exhibits strong resistance to corrosion in a variety of aggressive environments, including exposure to acids, alkaline solutions, and saltwater.
• Good weldability: GH3030 can be readily welded using conventional welding methods, facilitating the fabrication of complex structural components.

Owing to its excellent combination of mechanical and thermal properties, GH3030 is extensively utilized in high-temperature components such as turbine blades, combustion chambers, heat exchangers, and furnace parts, where high strength, corrosion resistance, and thermal stability are required.
XH78T is a high-temperature alloy that belongs to the family of nickel-based superalloys. It is also referred to as ЭИ435 or KHN78T.
The XH78T alloy is primarily composed of nickel (approximately 70%), chromium (around 20%), and trace amounts of other elements, including iron, titanium, aluminum, and cobalt. The specific combination of these elements endows XH78T with unique properties, making it particularly suitable for high-temperature applications.

Equivalent grade of GH3030

China		France	Russia	Britain	USA		Germany
GB	ISC	NF EN/NF	GOST	BS EN/BS	Commercial grade	UNS	W-Nr.
GH3030 (GH30)	H30300	ATG R NC 20T	ЭИ 435 XH78T KHN78T	HR5 DTD 703B N203 N403	Nimonic75	N06075	2.463 2.4951

Characteristic of GH3030 XH78T:

The 80Ni-20Cr solid solution-strengthened superalloy possesses a simple chemical composition and exhibits good thermal strength and high plasticity at temperatures below 800°C. It also demonstrates excellent oxidation resistance, superior thermal fatigue resistance, and favorable workability in terms of cold stamping and welding. Following solution treatment, the alloy retains a single-phase austenitic microstructure, which remains stable under practical operating conditions.

Metallographic structure of GH3030 XH78T :
The GH3030 alloy features a single-phase austenitic structure, with a small quantity of TiC and Ti(CN) distributed within the matrix.

GH3030 XH78T Seamless Pipe Chemical Composition:

Alloy Grade	C(max)	Si(max)	Mn(max)	P(max)	S(max)	Cr(max)	Ni	Al(max)	Ti	Fe(max)	Cu(max)
XH78T TU14-3-520-76	0.12	0.8	0.7	0.015	0.012	19-22	Balance	0.15	0.15-0.35	0.6	0.2
GH3030 GB/T 15062-2008	0.12	0.8	0.7	0.03	0.02	19-22	Balance	0.15	0.15-0.35	1.5	0.2

GH3030 XH78T Seamless Pipe Physical Properties:

Alloy Grade	Density	Melting point
GH3030 / XH78T	8.4 g/cm³	1374-1420ºC

GH3030 XH78T Seamless Pipe Mechanical Properties:

Alloy Grade	Tensile strength ó b/MPa	Yield strength ó 0.2/MPa	Elongation δ5%
XH78T TU 14-3-520-76	588	255	35%
GH3030  GB/T15062-2008	590	-	35

GB/T 15062-2008 GH3030 Seamless Tube / Pipe Standard Dimension and Permissilbe

Standard	Outside Diameter Tolerance(mm)		Thickness Tolerance(mm)		Length Tolerance (mm)
GB/T 15062-2008	[6~10]	Normal:±0.20 High:±0.15	[0.5~1.0]	Normal:±0.12; High:±0.10	+15mm/-0mm
	(10~30]	Normal:±0.30 High:±0.20	(1.0~3.0]	Normal:+15% / -12%; High:+12% / -10%
	(30~50]	Normal:±0.40 High:±0.30	Above3.0	Normal:+12% / -10%; High:±10%
	Above 50	Normal:±0.9% High:±0.8%

TU 14-3-520-76 XH78T ЭИ435 Seamless Tube / Pipe Standard Dimension and Permissilbe

Standard	Outside Diameter Tolerance(mm)		Thickness Tolerance(mm)		Length Tolerance (mm)
TU 14-3-520-76 XH78T /ЭИ435	[6~30]	±0.45	[1.0~3.0]	±15%	+5mm/-0mm
	Above 30	±0.1.2%	Above3.0	±12.5%

GB/T 15062-2008 GH3030 / TU 14-3-520-76 XH78T Seamless Tube / Pipe Standard Dimension and Permissilbe

Standard	Outside Diameter Tolerance(mm)		Thickness Tolerance(mm)		Length Tolerance (mm)
GB/T 15062-2008 GH3030	[6~10]	Normal:±0.20 High:±0.15	[0.5~1.0]	Normal:±0.12; High:±0.10	+15mm/-0mm
	(10~30]	Normal:±0.30 High:±0.20	(1.0~3.0]	Normal:+15% / -12%; High:+12% / -10%
	(30~50]	Normal:±0.40 High:±0.30	Above3.0	Normal:+12% / -10%; High:±10%
	Above 50	Normal:±0.9% High:±0.8%
TU 14-3-520-76 XH78T	[6~30]	±0.45	[1.0~3.0]	±15%	+5mm/-0mm
	Above 30	±0.1.2%	Above3.0	±12.5%

ASTM B829 Seamless Tube / Pipe Standard Dimension and Permissilbe

Permissible Variations
Nominal Outside Diameter,	Outside		Thickness of Specified		Thickness of Specifined
in. (mm)	Diameter, in (mm)		Average Wall, %		Minimum Wall, %
	Plus	Minus	Plus	Minus	Plus	Minus
Over 0.400(10) to 5/8(16), excl	0.005(0.13)	0.005(0.13)	15	15	30	0
5/8(16) to 1 1/2(38), incl	0.075(0.19)	0.075(0.19)	10	10	22	0
Over 1 1/2(38) to 3 (76), incl	0.010(0.25)	0.010(0.25)	10	10	22	0
Over 3(76) to 4 1/2(114), incl	0.010(0.38)	0.010(0.38)	10	10	22	0
Over 4 1/2(114) to 6(152), incl	0.020(0.51)	0.020(0.51)	12.5	12.5	28	0
Over 6(162) to 6 5/8(168), incl	0.025(0.64)	0.025(0.64)	12.5	12.5	28	0
Over 6 5/8(168) to 8 5/8(219), incl	0.031(0.79)	0.031(0.79)	12.5	12.5	28	0
Aovality - The permissible variations listed in this table apply to individual measurements, including out-of-roundness (ovality), except as follows: For pipes and tubes with a nominal wall thickness of 3% or less of the nominal outside diameter, the mean outside diameter shall conform to the permissible variation limits specified in this table, and individual measurements (including ovality) shall conform to the plus and minus values provided in the table, with these values increased by 0.5% of the nominal outside diameter. For pipes and tubes with an outside diameter exceeding 4 1/2 in. (114 mm) and a nominal wall thickness greater than 3% of the nominal outside diameter, the mean outside diameter shall comply with the permissible variations in this table, and individual measurements shall not exceed twice the permissible variation limits specified. Eccentricity - The permissible variations in this table apply to individual measurements, including eccentricity.

Due to its exceptional properties, the XH78T alloy finds potential applications across various industries:
Aerospace Industry: XH78T could be utilized in aerospace components like engine parts, structural elements, or components requiring lightweight yet robust materials capable of withstanding high stress and temperature fluctuations.
Automotive Sector: In the automotive industry, XH78T might find application in high-performance engine components, exhaust systems, or critical parts requiring superior durability and heat resistance.
Industrial Machinery: Its resistance to wear and corrosion makes XH78T suitable for use in machinery parts, pumps, valves, and tools subjected to challenging operating conditions.
Chemical Processing: The corrosion-resistant nature of XH78T could be advantageous in chemical processing equipment, reactors, or pipelines where exposure to corrosive substances is prevalent.
In this hypothetical context, the XH78T alloy embodies a fusion of properties that make it an attractive choice for industries requiring materials with exceptional strength, corrosion resistance, thermal stability, and durability. While it doesn't represent an existing alloy, its theoretical characteristics showcase the potential of advanced alloy engineering and its possible implications across various sectors.

Positive Material Identification (PMI)	Guohao Steel can perform PMI testing in house for most grades, or we can work with independent labs to complete PMI in order to meet customer specifications.
Testing	In some cases, HT/ET/UT testing of the stainless steel pipes may be required. We can assist you with this requirement.

 
 Q1:How many countries you already exported ?
A1:Exported to more than 30 countries mainly from America, Russia, Ukraine, Vietnam, Egypt, Iran, Turkey, Mexico etc.
Q2:How can I get some samples?
A2:Small samples in store and can provide the samples for free. Catalogue is available, most patterns we have ready samples in stock. Customized samples will take about 5-7days.
Q3:Do you have any MOQ limit for stainless steel products order? 
A3: MOQ, 1pc for ready stock of stainless steel seamless pipe. MOQ :1 tons for MTO.
Q4. How do you ship the goods and how long does it take to arrive?
A: We usually ship by DHL, UPS, FedEx or TNT. It usually takes 3-5 days to arrive. Airline and sea shipping also optional. For mass products, ship freight is preferred.
Q5:How does your company do regarding quality control?
A5:Mill Test Certificate is supplied with shipment. If needed, a Third Party Inspection is acceptable or SGS.
Q6: Is it OK to print my logo on products?
A7: Yes. OEM and ODM are available for us.