ASTM A453 Gr 660 Stud bolt also known as 1.4980 , X6NiCrTiMoVB25-15-2 or UNSS66286 ,which is an iron-nickel-chromium alloy.
ASTM A453 Grade 660 – Specification
Heat resistant steel with high strength, creep resistance, low magnetic permeability and high oxidation resistance. Endurance properties are obtained by emitting MC, M6C carbides by means of nickel, titanium and aluminum.
It retains the appropriate mechanical properties to a temperature of about 650 – 700 ℃. In addition, it exhibits suitable strength properties at extremely low temperatures. Heat resistant to a temperature of about 800 – 900 ℃.
Used as a steel for aviation and power engineering for heavy-duty rotors, gas turbine blades, steam turbines, pressure equipment parts and reactors, jet engines and rockets, exhaust systems. Also used in cryogenics and cryotechnics.
ASTM A453 . Materials and Manufacture Finishing Process:
Threads may be performed by machining or rolling. For Type 1 bolting, threading shall be performed after precipitation
heat treatment. Types M1 and M2 bolting shall have machine cut threads. For Types 2 R1 and R2, bolting shall have rolled threads.
Types R1 and M1 bolting, threading shall be performed after precipitation heat treatment. Types R2 and M2 bolting shall be
threaded after solution heat treatment but prior to precipitation heat treatment
ASTM A453
Standard Specification for High-Temperature Bolting, with Expansion Coefficients Comparable to Austenitic Stainless Steels
ASTM A453 grade 660 Manufacture
Finishing Process:
Threads may be formed by machining or rolling. Threads may be formed after precipitation heat treatment or after solution anneal but prior to precipitation heat treatment.
Type designations are as follows: Type M1—threads formed by machining after precipitation heat treatment. Type M2—threads formed by machining after solution anneal but prior to precipitation heat treatment. Type R1—threads formed by rolling after precipitation heat treatment. Type R2—threads formed by rolling after solution anneal but prior to precipitation heat treatment. When not specified by the purchaser, the type supplied shall be the option of the manufacturer
ASTM A453 grade 660 Chemical compostion
ASTM A453 grade 660 Mechanical Properties
ASTM A453 grade 660 Heat Treatment
ASTM A453 grade 660 stress Rupture Requirement
We produce Stud Bolts, Hex Bolts ,Expansion bolts,threaded rods etc as per A453 Grade 660 in Class A/B/C/D , intended for Special Engineering Applications .
High Temperature Bolting Grade: A453 Gr.660 Class A, A453 Gr.660 Class B & A453 Gr.660 Class C,A453 Gr.660 Class D
Fully Threaded B18.31.1M Stud Bolt M39 A453 Grade660 Stud Bolt.