Differences between ASTM B167 and B775 Inconel 601 tubing

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For Inconel 601 alloy, the main difference lies not in the B167 and B775 standards themselves, as both cover similar nickel-chromium alloys, but rather in the fact that the B167 standard specifies seamless tubes, while the B775 standard covers both seamless and welded tubes of this alloy. Both standards require the alloy to possess excellent high-temperature oxidation resistance and aqueous corrosion resistance, which are crucial for furnace components, heat exchangers, and chemical processing equipment requiring good mechanical strength.

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What is Inconel 601?

INCONEL 601 nickel-chromium-iron alloy (UNS N06601/W.Nr. 2.4851) is a general-purpose engineering material suitable for applications requiring heat and corrosion resistance. A notable characteristic of INCONEL 601 alloy is its excellent resistance to high-temperature oxidation.

ASTM B167/B775 Inconel 601 tubing contains a nickel-chromium-molybdenum alloy with niobium, allowing it to achieve high strength without requiring strengthening heat treatment. In conditions where the corrosion and heat resistance of steel and other metals are insufficient, high-performance alloys, including ASTM B167/B775 Inconel 601 tubing, become the material of choice for designers. 601 alloy tubing is also relatively insensitive to flow rate effects and is widely used in critical components in contact with flowing acids, such as bubble caps or valves. INCONEL 601 alloy maintains excellent ductility and toughness at low temperatures.

Inconel 601 material is widely used in marine, medical, general industrial, oil and gas, nuclear and power generation, aerospace, and chemical industries. Its product forms include pipes, tubes, fittings, flanges, round bars, plates, wires, seals, fasteners, heat exchangers, valves, steam pipes, and exhaust pipes. It can also be used as a weld overlay to improve corrosion resistance.

ASTM B167 (Nickel-Chromium-Iron Alloy Seamless Tubes): This standard specifically addresses seamless tubes (without welds) for high-temperature environments, commonly used in furnace components, heat exchangers, and catalytic converters.
ASTM B775 (Nickel-Chromium-Iron Alloy Welded Tubes): This standard covers both seamless and welded tubes (with welds) of this alloy, providing a wider range of options for general engineering applications requiring high strength and corrosion resistance.

ASTM B167/B775 Inconel 601 Tube Specifications

Material	Size	Swg & Bwg		Specification
Inconel 601 Seamless Tube	6.35 mm OD To 101.6 mm OD	20 Swg. 18 Swg. 16 Swg.	14 Swg. 12 Swg. 10 Swg.	ASTM B163 / ASTM B163
Inconel 601 Welded (ERW) Tube	6.35 mm OD To 152 mm OD	20 Swg. 18 Swg. 16 Swg.	14 Swg. 12 Swg. 10 Swg.	ASTM B730/ ASTM SB730

ASTM B167/B775 Inconel 601 Tube Price

Price of Inconel Pipe : $ 44000 ~ $ 45600 USD / Ton

Price of Inconel Tube : $ 44000 ~ $ 45800 USD / Ton

Price of Inconel 601 Seamless Pipe : $ 44000 ~ $ 45500 USD / Ton

Price of Inconel 601 Seamless Tube : $ 45000 ~ $ 46500 USD / Ton

Price of Inconel 601 ERW/Welded Pipe : $ 44000 ~ $ 45500 USD / Ton

Price of Inconel 601 Seamless Tube : $ 26000 ~ $ 27500 USD / Ton

ASTM B167/B775 Inconel 601 Tube Chemical Composition

Grade	Ni	Fe	C	Mn	Si	Cu	Cr	S	Al
Inconel 601	61.5 min	14	0.05 max	1.0 max	0.50 max	1.0 max	21.0 – 25.0	0.015 max	1.0 – 1.7

ASTM B167/B775 Inconel 601 Tube Yield and Tensile Strength

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.1g/cm3	1320-1370℃	650 min.	300 min.	30 %

ASTM B167/B775 Inconel 601 Tube Schedule Chart & Wall Thickness

NPS (in)	Outside Diameter (in)	ASTM B167/B775 Inconel 601 Tube Schedule
		SCH 10	SCH 20	SCH 30	SCH STD	SCH 40	SCH 60	SCH XS	SCH 80	SCH 100	SCH 120	SCH 140	SCH 160	SCH XXS
		Wall Thickness (in)
1/8	0.405				0.068	0.068		0.095	0.095
1/4	0.540				0.088	0.088		0.119	0.119
3/8	0.675				0.091	0.091		0.126	0.126
1/2	0.840				0.109	0.109		0.147	0.147				0.187	0.294
3/4	1.050				0.113	0.113		0.154	0.154				0.219	0.308
1	1.315				0.133	0.133		0.179	0.179				0.250	0.358
1 1/4	1.660				0.140	0.140		0.191	0.191				0.250	0.382
1 1/2	1.900				0.145	0.145		0.200	0.200				0.281	0.400
2	2.375				0.154	0.154		0.218	0.218				0.344	0.436
2 1/2	2.875				0.203	0.203		0.276	0.276				0.375	0.552
3	3.500				0.216	0.216		0.300	0.300				0.438	0.600
3 1/2	4.000				0.226	0.226		0.318	0.318
4	4.500				0.237	0.237		0.337	0.337		0.438		0.531	0.674
5	5.563				0.258	0.258		0.375	0.375		0.500		0.625	0.750
6	6.625				0.280	0.280		0.432	0.432		0.562		0.719	0.864
8	8.625		0.250	0.277	0.322	0.322	0.406	0.500	0.500	0.594	0.719	0.812	0.906	0.875
10	10.750		0.250	0.307	0.365	0.365	0.500	0.500	0.594	0.719	0.844	1.000	1.125	1.000
12	12.750		0.250	0.330	0.375	0.406	0.562	0.500	0.688	0.844	1.000	1.125	1.312	1.000
14	14.000	0.250	0.312	0.375	0.375	0.438	0.594	0.500	0.750	0.938	1.094	1.250	1.406
16	16.000	0.250	0.312	0.375	0.375	0.500	0.656	0.500	0.844	1.031	1.219	1.438	1.594
18	18.000	0.250	0.312	0.438	0.375	0.562	0.750	0.500	0.938	1.156	1.375	1.562	1.781
20	20.000	0.250	0.375	0.500	0.375	0.594	0.812	0.500	1.031	1.281	1.500	1.750	1.969
22	22.000	0.250	0.375	0.500	0.375		0.875	0.500	1.125	1.375	1.625	1.875	2.125
24	24.000	0.250	0.375	0.562	0.375	0.688	0.969	0.500	1.219	1.531	1.812	2.062	2.344
30	30.000	0.312	0.500	0.625	0.375			0.500
32	32.000	0.312	0.500	0.625	0.375	0.688
34	34.000	0.312	0.500	0.625	0.375	0.688
36	36.000	0.312	0.500	0.625	0.375	0.750
42	42.000		0.500	0.625	0.375	0.750

Temperature ranges for hot bending ASTM B167/B775 Inconel 601 Tube

Nickel and Nickel alloy	Temperature Range (oF)
Nickel	1200 – 2300
Nickel Copper	1700 – 2150
Ni-Cr-Fe	1850 – 2300
Ni-Fe-Cr	1850 – 2200
Low Carbon Nickel	1200 – 2300

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About Gnee Steel

Gnee Steel is a professional manufacturer of nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy 800, Incoloy 800H/HT, Incoloy 825, Monel 400, Monel K500, and other high-temperature alloy materials. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power generation, automotive, nuclear energy, and other fields, and we can provide customized alloy material solutions according to customer needs. For inquiries about alloy material prices or customized alloy material solutions, please feel free to contact us via email at ss@gneesteel.com for a quote.

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