Inconel Tubing
Inconel tubing is a nickel-chromium alloy tube designed for harsh environments where heat, pressure, and corrosion occur together. It is mainly available in grades Inconel 600 (UNS N06600) and Inconel 625 (UNS N06625), with nickel content ranging from 58% to 72% and chromium from 14% to 23%. The alloy forms a strong oxide layer at high temperatures, which helps it resist oxidation and carburisation. It can handle temperatures up to 1093°C, offers excellent resistance to pitting and crevice corrosion, and keeps its strength even under repeated heating and cooling. Due to these properties, Inconel tubing is widely used in aerospace, chemical processing, oil and gas, power generation, and nuclear industries where standard stainless steel cannot perform well.
Inconel Tubing Prices
Inconel tubing prices depend on the grade, size, and order quantity. Understanding these cost factors helps you budget accurately before sending an RFQ.
Approximate Price Range
Inconel tubing in India is priced between Rs. 3600 and Rs. 6,000 per kg for standard grades and schedules. Grade 625 commands the higher end of this range due to its molybdenum and niobium content.
Factors Affecting Price
Grade and alloy content: Inconel 625 contains higher molybdenum and niobium levels than Inconel 600. This directly raises the raw material input cost.
- Wall thickness and schedule: Heavier schedules consume more alloy per unit length. Cost per kg increases proportionally with wall thickness.
- Manufacturing method: Seamless Inconel tubing costs more than welded variants due to tighter tooling requirements and lower production volumes.
- Market fluctuations: The base rate is influenced by commodity market prices for nickel and chromium. Before ordering bulk orders, confirm the current pricing.
Inconel Tubing Grades
Inconel tubing grades are selected based on service temperature, corrosive environment, and mechanical requirements. The common grades are listed below.
- Inconel 725 Tubing
- Inconel X 750 Tubing
- Inconel 625 Tubing
- Inconel 601 Tubing
- Inconel 690 Tubing
- Inconel 718 Tubing
- Inconel 617 Tubing
- Inconel 600 Tubing
Types Of Inconel Tubing
Inconel tubing is available in 3 key types; each is designed for different pressure levels, working conditions, and fabrication needs.
- Seamless Inconel tubing
- Welded/ERW Inconel tubing
- Capillary Inconel tubing
Inconel Tubing Specifications
The table below covers governing standards, dimensional range, mechanical properties, and available forms for Inconel tubing procurement and engineering reference.
|
Category |
Specification details |
|
Material grades |
Inconel 600 (UNS N06600, W-Nr 2.4816), Inconel 625 (UNS N06625, W-Nr 2.4856), and Inconel 800/825 (UN-N series) are commonly used in tubing form |
|
Applicable standards |
Condenser/heat-exchanger tubing: ASTM B163 / ASME SB-163; Seamless pipe-type tubing: ASTM B167 / B829; Inconel 625 tubing: ASTM B444 (UNS N06625); Welded tubing: ASTM B516 / B751 |
|
Forms |
Seamless cold-drawn tubing (condenser, heat-exchanger, boiler tubes); Hot-finished/hot-drawn tubing (larger-diameter pressure tubing); Welded/ERW tubing (instrument-type and light-duty service) |
|
Size range (OD) |
Seamless tubing: 3.35–101.6 mm OD (0.13"–4") typical for B163; Welded tubing: 6.35–152 mm OD (0.25"–6"); instrument type: 3–19 mm OD (0.12"–0.75") |
|
Wall thickness |
Typically 0.020"–0.220" (approx. 0.5–5.6 mm); other walls available on request |
|
Mechanical properties (typical, 600/625) |
0.2% yield strength: 275–345 MPa at room temperature; Tensile strength: 550–830 MPa, depending on grade and temper; Elongation: 30–40% in 2" gauge (annealed condition) |
|
Heat treatment |
Annealed (solution-annealed) for maximum ductility and corrosion resistance; Stress-relieved or cold-worked options for higher strength; Typical annealing: 1010–1120°C (1850–2050°F) with rapid cooling |
|
Surface and finish |
Smooth, commercially straight, free from kinks, laps, and injurious defects; Suitable for high-temperature exchangers, boilers, and exhaust gas service; Optional bright-annealed or polished finishes for instrumentation |
|
Testing and certification |
Hydrostatic or nondestructive electric test per ASTM B163 / B167 / B444; Chemical analysis per ASTM E109 / E1473 or equivalent; Mill test certificates (MTC) per EN 10204 3.1 / 3.2 or customer requirement |
Inconel Tubing Size Chart
Inconel tubing sizes range from NPS 1/8" through 2", covering OD values from 10.3 mm to 60.3 mm for standard industrial and heat-exchanger layouts.
|
NPS (inch) |
OD (inch) |
OD (mm) |
Typical wall (mm) |
Typical schedule (SCH) |
Notes |
|
1/8" |
0.405 |
10.3 |
1.24 |
10S |
Small-diameter condenser/heat-exchanger tubes |
|
1/4" |
0.540 |
13.7 |
1.65 |
10S |
Common for instrumentation and small-duty lines |
|
3/8" |
0.675 |
17.2 |
1.65 |
10S |
Light-duty high-temperature tubing |
|
1/2" |
0.840 |
21.3 |
2.11 |
10S |
Standard condenser/heat-exchanger tubing |
|
3/4" |
1.050 |
26.7 |
2.11 |
10S |
Widely used in boiler and heat-exchanger services |
|
1" |
1.315 |
33.4 |
2.77 |
10S |
Standard pressure-tube size for Inconel 600/625 |
|
1 1/4" |
1.660 |
42.2 |
2.77 |
10S |
Common for headers and process lines |
|
1 1/2" |
1.900 |
48.3 |
2.77 |
10S |
General-purpose tubing |
|
2" |
2.375 |
60.3 |
2.87–3.68 |
10S, 40S |
Widely used pipe-sized tubing |
Schedule Chart Of Inconel Tubing
Wall thickness increases with schedule number. A higher schedule delivers a thicker wall and a higher pressure rating. Use this chart to confirm the correct wall specification for your operating pressure and temperature.
|
NPS (inch) |
OD (inch) |
OD (mm) |
SCH 10 (mm) |
SCH 40 (mm) |
SCH 80 (mm) |
SCH 160 (mm) |
|
1/8" |
0.405 |
10.29 |
1.24 |
1.85 |
2.41 |
– |
|
1/4" |
0.540 |
13.72 |
1.65 |
2.24 |
3.02 |
– |
|
3/8" |
0.675 |
17.15 |
1.65 |
2.24 |
3.02 |
– |
|
1/2" |
0.840 |
21.34 |
2.11 |
2.77 |
3.73 |
– |
|
3/4" |
1.050 |
26.67 |
2.11 |
2.77 |
3.73 |
– |
|
1" |
1.315 |
33.40 |
2.77 |
3.38 |
4.55 |
– |
|
1 1/4" |
1.660 |
42.16 |
2.77 |
3.38 |
4.55 |
– |
|
1 1/2" |
1.900 |
48.26 |
2.77 |
3.38 |
4.55 |
– |
|
2" |
2.375 |
60.33 |
2.87 |
3.68 |
5.16 |
– |
|
2 1/2" |
2.875 |
73.03 |
3.05 |
3.91 |
5.49 |
– |
|
3" |
3.500 |
88.90 |
3.05 |
3.91 |
5.49 |
6.55 |
|
4" |
4.500 |
114.30 |
3.05 |
3.91 |
5.49 |
6.55 |
Key Features Of Inconel Tubing
Inconel tubing is specified for 7 service conditions where standard austenitic stainless grades and carbon steel fail under load or thermal exposure.
- High temperature resistance
- Corrosion resistance
- Oxidation resistance
- Mechanical strength
- Stress corrosion cracking resistance
- Fatigue resistance
- Versatile fabrication
Applications Of Inconel Tubing
Inconel tubing serves 6 major industries where high temperatures, corrosive media, or elevated pressures rule out conventional piping materials.
- Aerospace
- Chemical processing
- Oil and gas
- Power generation
- Marine engineering
- Nuclear industry
How To Choose The Right Inconel Tubing Supplier And Manufacturer?
Choosing the right Inconel tubing suppliers directly affects tubing integrity, project timelines, and total procurement cost. Evaluate these 4 areas before finalising a vendor.
Selecting The Right Supplier And Manufacturer
Confirm the manufacturer produces Inconel tubing in the exact grade and NPS required. Not every facility handles nickel alloys. Verify production capabilities for Inconel 600 and 625 before issuing an RFQ.
Technical Considerations
Match the grade to the service environment, whether high-temperature oxidation, acidic media, or chloride exposure. Request a Material Test Certificate (MTC) confirming chemical composition and mechanical properties. Confirm compliance with ASTM B163 for seamless and ASTM B516 for welded tubing. Custom wall schedules carry 8–12 week lead times; check stock availability early.
Evaluating Supplier Credibility
A reliable Inconel tubing supplier holds ISO 9001 certification at a minimum. Every tube batch must carry a heat number traceable to the originating mill. This is essential for project documentation and quality audits.
Procurement Strategy
Send a clear RFQ that includes grade (UNS number), NPS, schedule, finish, governing standard, and order quantity. Compare at least 3 supplier proposals based on pricing, lead time, MTC availability, and minimum order quantities. For bulk orders, schedule a pre-dispatch inspection (PDI) or third-party inspection (TPI) at the manufacturer's site.
Inconel tubing is a nickel-chromium alloy tube designed for harsh environments where heat, pressure, and corrosion occur together. It is mainly available in grades Inconel 600 (UNS N06600) and Inconel 625 (UNS N06625), with nickel content ranging from 58% to 72% and chromium from 14% to 23%. The alloy forms a strong oxide layer at high temperatures, which helps it resist oxidation and carburisation. It can handle temperatures up to 1093°C, offers excellent resistance to pitting and crevice corrosion, and keeps its strength even under repeated heating and cooling. Due to these properties, Inconel tubing is widely used in aerospace, chemical processing, oil and gas, power generation, and nuclear industries where standard stainless steel cannot perform well.
Inconel Tubing Prices
Inconel tubing prices depend on the grade, size, and order quantity. Understanding these cost factors helps you budget accurately before sending an RFQ.
Approximate Price Range
Inconel tubing in India is priced between Rs. 3600 and Rs. 6,000 per kg for standard grades and schedules. Grade 625 commands the higher end of this range due to its molybdenum and niobium content.
Factors Affecting Price
Grade and alloy content: Inconel 625 contains higher molybdenum and niobium levels than Inconel 600. This directly raises the raw material input cost.
- Wall thickness and schedule: Heavier schedules consume more alloy per unit length. Cost per kg increases proportionally with wall thickness.
- Manufacturing method: Seamless Inconel tubing costs more than welded variants due to tighter tooling requirements and lower production volumes.
- Market fluctuations: The base rate is influenced by commodity market prices for nickel and chromium. Before ordering bulk orders, confirm the current pricing.
Inconel Tubing Grades
Inconel tubing grades are selected based on service temperature, corrosive environment, and mechanical requirements. The common grades are listed below.
- Inconel 725 Tubing
- Inconel X 750 Tubing
- Inconel 625 Tubing
- Inconel 601 Tubing
- Inconel 690 Tubing
- Inconel 718 Tubing
- Inconel 617 Tubing
- Inconel 600 Tubing
Types Of Inconel Tubing
Inconel tubing is available in 3 key types; each is designed for different pressure levels, working conditions, and fabrication needs.
- Seamless Inconel tubing
- Welded/ERW Inconel tubing
- Capillary Inconel tubing
Inconel Tubing Specifications
The table below covers governing standards, dimensional range, mechanical properties, and available forms for Inconel tubing procurement and engineering reference.
|
Category |
Specification details |
|
Material grades |
Inconel 600 (UNS N06600, W-Nr 2.4816), Inconel 625 (UNS N06625, W-Nr 2.4856), and Inconel 800/825 (UN-N series) are commonly used in tubing form |
|
Applicable standards |
Condenser/heat-exchanger tubing: ASTM B163 / ASME SB-163; Seamless pipe-type tubing: ASTM B167 / B829; Inconel 625 tubing: ASTM B444 (UNS N06625); Welded tubing: ASTM B516 / B751 |
|
Forms |
Seamless cold-drawn tubing (condenser, heat-exchanger, boiler tubes); Hot-finished/hot-drawn tubing (larger-diameter pressure tubing); Welded/ERW tubing (instrument-type and light-duty service) |
|
Size range (OD) |
Seamless tubing: 3.35–101.6 mm OD (0.13"–4") typical for B163; Welded tubing: 6.35–152 mm OD (0.25"–6"); instrument type: 3–19 mm OD (0.12"–0.75") |
|
Wall thickness |
Typically 0.020"–0.220" (approx. 0.5–5.6 mm); other walls available on request |
|
Mechanical properties (typical, 600/625) |
0.2% yield strength: 275–345 MPa at room temperature; Tensile strength: 550–830 MPa, depending on grade and temper; Elongation: 30–40% in 2" gauge (annealed condition) |
|
Heat treatment |
Annealed (solution-annealed) for maximum ductility and corrosion resistance; Stress-relieved or cold-worked options for higher strength; Typical annealing: 1010–1120°C (1850–2050°F) with rapid cooling |
|
Surface and finish |
Smooth, commercially straight, free from kinks, laps, and injurious defects; Suitable for high-temperature exchangers, boilers, and exhaust gas service; Optional bright-annealed or polished finishes for instrumentation |
|
Testing and certification |
Hydrostatic or nondestructive electric test per ASTM B163 / B167 / B444; Chemical analysis per ASTM E109 / E1473 or equivalent; Mill test certificates (MTC) per EN 10204 3.1 / 3.2 or customer requirement |
Inconel Tubing Size Chart
Inconel tubing sizes range from NPS 1/8" through 2", covering OD values from 10.3 mm to 60.3 mm for standard industrial and heat-exchanger layouts.
|
NPS (inch) |
OD (inch) |
OD (mm) |
Typical wall (mm) |
Typical schedule (SCH) |
Notes |
|
1/8" |
0.405 |
10.3 |
1.24 |
10S |
Small-diameter condenser/heat-exchanger tubes |
|
1/4" |
0.540 |
13.7 |
1.65 |
10S |
Common for instrumentation and small-duty lines |
|
3/8" |
0.675 |
17.2 |
1.65 |
10S |
Light-duty high-temperature tubing |
|
1/2" |
0.840 |
21.3 |
2.11 |
10S |
Standard condenser/heat-exchanger tubing |
|
3/4" |
1.050 |
26.7 |
2.11 |
10S |
Widely used in boiler and heat-exchanger services |
|
1" |
1.315 |
33.4 |
2.77 |
10S |
Standard pressure-tube size for Inconel 600/625 |
|
1 1/4" |
1.660 |
42.2 |
2.77 |
10S |
Common for headers and process lines |
|
1 1/2" |
1.900 |
48.3 |
2.77 |
10S |
General-purpose tubing |
|
2" |
2.375 |
60.3 |
2.87–3.68 |
10S, 40S |
Widely used pipe-sized tubing |
Schedule Chart Of Inconel Tubing
Wall thickness increases with schedule number. A higher schedule delivers a thicker wall and a higher pressure rating. Use this chart to confirm the correct wall specification for your operating pressure and temperature.
|
NPS (inch) |
OD (inch) |
OD (mm) |
SCH 10 (mm) |
SCH 40 (mm) |
SCH 80 (mm) |
SCH 160 (mm) |
|
1/8" |
0.405 |
10.29 |
1.24 |
1.85 |
2.41 |
– |
|
1/4" |
0.540 |
13.72 |
1.65 |
2.24 |
3.02 |
– |
|
3/8" |
0.675 |
17.15 |
1.65 |
2.24 |
3.02 |
– |
|
1/2" |
0.840 |
21.34 |
2.11 |
2.77 |
3.73 |
– |
|
3/4" |
1.050 |
26.67 |
2.11 |
2.77 |
3.73 |
– |
|
1" |
1.315 |
33.40 |
2.77 |
3.38 |
4.55 |
– |
|
1 1/4" |
1.660 |
42.16 |
2.77 |
3.38 |
4.55 |
– |
|
1 1/2" |
1.900 |
48.26 |
2.77 |
3.38 |
4.55 |
– |
|
2" |
2.375 |
60.33 |
2.87 |
3.68 |
5.16 |
– |
|
2 1/2" |
2.875 |
73.03 |
3.05 |
3.91 |
5.49 |
– |
|
3" |
3.500 |
88.90 |
3.05 |
3.91 |
5.49 |
6.55 |
|
4" |
4.500 |
114.30 |
3.05 |
3.91 |
5.49 |
6.55 |
Key Features Of Inconel Tubing
Inconel tubing is specified for 7 service conditions where standard austenitic stainless grades and carbon steel fail under load or thermal exposure.
- High temperature resistance
- Corrosion resistance
- Oxidation resistance
- Mechanical strength
- Stress corrosion cracking resistance
- Fatigue resistance
- Versatile fabrication
Applications Of Inconel Tubing
Inconel tubing serves 6 major industries where high temperatures, corrosive media, or elevated pressures rule out conventional piping materials.
- Aerospace
- Chemical processing
- Oil and gas
- Power generation
- Marine engineering
- Nuclear industry
How To Choose The Right Inconel Tubing Supplier And Manufacturer?
Choosing the right Inconel tubing suppliers directly affects tubing integrity, project timelines, and total procurement cost. Evaluate these 4 areas before finalising a vendor.
Selecting The Right Supplier And Manufacturer
Confirm the manufacturer produces Inconel tubing in the exact grade and NPS required. Not every facility handles nickel alloys. Verify production capabilities for Inconel 600 and 625 before issuing an RFQ.
Technical Considerations
Match the grade to the service environment, whether high-temperature oxidation, acidic media, or chloride exposure. Request a Material Test Certificate (MTC) confirming chemical composition and mechanical properties. Confirm compliance with ASTM B163 for seamless and ASTM B516 for welded tubing. Custom wall schedules carry 8–12 week lead times; check stock availability early.
Evaluating Supplier Credibility
A reliable Inconel tubing supplier holds ISO 9001 certification at a minimum. Every tube batch must carry a heat number traceable to the originating mill. This is essential for project documentation and quality audits.
Procurement Strategy
Send a clear RFQ that includes grade (UNS number), NPS, schedule, finish, governing standard, and order quantity. Compare at least 3 supplier proposals based on pricing, lead time, MTC availability, and minimum order quantities. For bulk orders, schedule a pre-dispatch inspection (PDI) or third-party inspection (TPI) at the manufacturer's site.
Inconel Tubing Suppliers
Inconel Tubing FAQ's
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solitaire overseas 
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jayhind metal & tubes
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m.a.international
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navjyoti metal india
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r s metal
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sanghvi enterprises
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shree metal
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astralloy india
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prime tube impex
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metcore alloys
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