Comparison of the full names of Inconel 600 alloy tubing and Nickel 718 tubing

Inconel 600 tubing (UNS N06600) is a high-nickel, high-chromium alloy known for its oxidation resistance; while Nickel 718 tubing (UNS N07718) is a precipitation-hardening alloy known for its excellent strength at high temperatures. The main difference lies in their primary strengthening mechanisms (Inconel 600 tubing relies on compositional strengthening, while N718 utilizes γ' precipitates for strengthening) and the key alloying elements used for strengthening in N718, such as niobium (Nb). "Inconel" and "Nickel" are brand/series names, but the specific numbers (600, 718) represent different compositions and applications of these nickel-based superalloys.

What is the name of Inconel 600?

Inconel 600 alloy is a nickel-chromium-iron solid solution strengthened alloy with a nominal chemical composition of 72% nickel, 16% chromium, and 8% iron. It is commonly known by the trade name Inconel® 600 and the general designation UNS N06600.

Inconel 600 Pipe

Inconel 600 pipe, also known as Nicrofer 716, Pyromet Alloy 600, and Nicrimphy 600, is a nickel-chromium alloy with excellent oxidation resistance and high-temperature corrosion resistance. Due to its high nickel content, Inconel 600 pipe exhibits strong resistance to chloride stress corrosion cracking. Inconel 600 pipe requires no aging hardening treatment, as it is hardened and strengthened solely through cold working. Inconel 600 pipe can operate in a temperature range from low temperatures to 700°F (370°C).

Inconel 718 Alloy Pipe

Alloy 718 pipe is a precipitation-hardening nickel-based alloy pipe designed to exhibit extremely high yield strength, tensile strength, and creep rupture strength at temperatures up to 1300°F (700°C). Alloy 718 has a slow age hardening response, so it does not undergo spontaneous hardening during heating and cooling, and can be annealed and welded.

Specification of Inconel Alloy 600/718 Pipes

Pipe/Tube Specifications:ASTM B167, B517, B516 / ASME SB167, SB517, SB516

Dimentions:ASTM, ASME

Pipe Outside Diameter: 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock

Tube Outside Diameter: 1/8" OD TO 2"OD 3MM OD TO 38 MM OD

Range:1/2" OD up to 5" OD, customs diameters also available

Type: Seamless / ERW / Welded / Capillary Tubes

Form: Round Tube, Square Tube, Rectangular Tube

Length: Single Random, Double Random & Required Length

End: Plain End, Beveled End, Treaded

End Protection: Plastic Caps

Finish: Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

External Coating: 3LPE / 3LPP/ FBE/ DFBE/ PP

Chemical Composition of Inconel Alloy 600/718 Tubes

Grade	C	Mn	Si	S	Cu	Fe	Ni	Cr
Inconel 600	0.15 max	1.00 max	0.50 max	0.015max	0.50 max	6.00 – 10.00	72.00 min	14.00 – 17.00
Inconel 718	0.08 max	0.35 max	0.35 max	0.015 max	0.30 max	-	50.00 - 55.00	17.00 - 21.00

Inconel Alloy 600/718 Pipes Mechanical Properties

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Inconel 600	8.47 g/cm3	1413 °C (2580 °F)	Psi – 95,000 , MPa – 655	Psi – 45,000 , MPa – 310	40 %
Inconel 718	8.2 g/cm3	1350 °C (2460 °F)	Psi – 1,35,000 , MPa – 930	Psi – 75,000 , MPa – 482	45 %

Inconel 600 Tube (UNS NO6600)

Type: Solid solution strengthened alloy.

Main elements: High nickel (72%), chromium (14-17%), iron (6-10%). Strengthening: Provides excellent heat resistance and corrosion resistance, especially resistance to stress corrosion cracking, through high nickel and chromium content.

Applications: Furnaces, chemical processing, nuclear reactors, high-temperature environments.

Inconel 718 Tube (UNS NO7718)

Type: Precipitation hardening (PH) alloy.

Main elements: Nickel, chromium, iron, and significant amounts of molybdenum (Mo), niobium (Nb), tantalum (Ta), aluminum (Al), titanium (Ti), and cobalt (Co).

Strengthening: Achieves excellent strength and hardness through age hardening (precipitation strengthening) using elements such as niobium (Nb), titanium (Ti), aluminum (Al), molybdenum (Mo), and cobalt (Co).

Application areas: jet engines, gas turbines, rocket engines, high-strength fasteners (aerospace/power).

Why Choose Gnee as Your Nickel-Based Alloy Supplier

✅ Over 18 years of export experience, products sold to more than 80 countries

✅ Certified by ISO, SGS, and BV

✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars

✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging

✅ Fast delivery within 7-15 days, supported by global logistics partners

📦 Packaging and Shipping

All stainless steel products are packaged using the following methods:

Wooden pallets or crates

Moisture-proof packaging

Labels with furnace number, standard, and size labels