ХН75МБТЮ, Инконель 625

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Basic qualities

Today chrome-nickel pipes, including pipes of the brand KhN75MBTU-dv, deservedly gained popularity and constant demand in the metallurgy, motor industry, gas industry and other branches of the modern industry. Among the advantages of the pipe brand KhN75MBTU-vb — high resistance to corrosion, ductility, excellent machinability, considerable heat resistance at high temperatures up to 950 ° C. Nickel alloys, despite their relative high cost, have a whole set of unique qualities that are guaranteed to pay back the initial costs. Nickel determines the resistance to the action of most industrial aggressive environments, reliability and high-temperature strength under high-temperature operating conditions.


The percentage composition of HN75MBTYU- GOST is GOST 5632−72

Ni C Mo Cr Ti Nb Fe Al S Si R
68.6−77.6 ≤0,1 1.8−2.3 19−22 0.35−0.75 0.9−1.3 ≤3 0.35−0.75 ≤0.012 ≤0.8 ≤0,02

Application of

The scope of the HN75MBTU-h pipe is rather extensive: the manufacture of pipeline system components, rotor elements, heat-resistant parts of combustion chambers of gas turbine engines operating at tº up to 950 ° C. An important quality of the pipe ХН75МБТЮ-вд is its good weldability, which is why it is widely used for the production of welded gas pipelines.

Technological parameters

Weldability Necessary operations
Without welding restrictions For qualitative welding, preliminary preparation is not required
Alloys of limited welding type A quality welded joint may be obtained after preheating the contacting surfaces to 100−120 ° C and carrying out the final heat treatment of the suture zone, after completion of the welding work
Type of alloys difficult to weld Before welding, the contacting surfaces are heated to 200−300 ° C. After welding, to improve the characteristics of the seam zone, the semi-finished product undergoes high-temperature annealing.
Mechanical properties
Name of the characteristic Symbol Numeric value
Sheets according to GOST 24982−81
Limit of proportionality (yield index for deformation of residual type), MPa ST 345−390
Short-term strength (limit value), MPa Sv 740
Relative elongation at breaking strength,% D5 35
Heat treatment Hardening at temperatures from 1050 to 1090 ° C
Characteristic The numerical value of the parameter
Measurement temperature tºC, 900 800 700 600 500 400 300 200 100 20
Modulus of elasticity (E), MPa 1.69 2.1
Coefficient of linear expansion (ах10 6), 1 / deg 15.88 15.18 15.11 14.59 14.22 14.2 13.42 13.08 12.28
Heat capacity (I), W / (mxgrade) 47.4 40.2 34.5 29.3 24 19.6 15.9 13 10.5

Buy at the best price

On our site we offer a wide range of products from chromium-nickel alloys. The high quality of the products and the absence of intermediaries (working directly with the manufacturer) determine the most profitable offers for the purchase of a pipe of the brand KhN75MBTYU-V for solving any production problems. Delivery in the shortest time in any region of the country and abroad, the compliance of products of regulatory documentation has long won the trust of regular customers. Due to its relatively low cost and a wide range of models, the XN75MBTU-dw pipe enjoys unchanged popularity in many areas of production.