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8740 Chrome Moly Screws and Fasteners manufacturer in India

8740 Rod Bolts is a nickel-chromium-molybdenum low-alloy steel which has good strength and good hardenability and toughness properties. It can be used in applications where toughness, strength, and wear resistance are of most essential. It is extensively used as high-strength forged fasteners. It is often found in aerospace applications for aerospace engine parts, aerospace fasteners and aerospace subassemblies. 8740 Chrome Moly Bolts can be forged at a starting temperature of around 2200ºF and can be forged down to roughly 1700ºF. After forging it is best slow cooled, but it can also be shifted to a furnace held at a temperature approximating the temperature of forging finishing and then soaked and air cooled. 8740 steel bolts can be austenitized at around 1525 – 1575ºF and oil or water quenched depending upon section size and complexity. 8740 bolts can be readily machined following suitable heat treatment. And can be welded by normal fusion methods, but prior to tempering and hardening. Pre heat and post heat are suggested.

8740 Rod Bolts

8740 Rod Bolts

8740 Steel Screws

8740 Steel Screws

8740 Chrome Moly Bolts

8740 Chrome Moly Bolts

Specification

Bolt material socket
size
under
head
length
thread
size
torque
8740 7/16" 1.500" 3/8" 40 ftlbs
8740 7/16" 1.600" 7/16" 63 ftlbs
8740 7/16" 1.750" 7/16" 63 ftlbs
8740 7/16" 1.800" 7/16" 63 ftlbs
2000 3/8" 1.500" 5/16" 28 ftlbs
2000 7/16" 1.500" 3/8" 43 ftlbs
2000 7/16" 1.600" 7/16" 75 ftlbs
2000 7/16" 1.800" 7/16" 75 ftlbs
L-19 1/2" 1.600" 7/16" 79 ftlbs
L-19 1/2" 1.750" 7/16" 79 ftlbs
CA 625+ 3/8" 1.500" 5/16" 32 ftlbs

Technical details

Composition ARP 2000
Bolt Yield strength 200,000 PSI
Tensile strength of Bolt 220,000 PSI
Part Number BE Rod Bolts (BE-CRB50-S65)
Bolt Torque specification 50 Ft/Lbs, or 0.0065-0.0070 inch stretch