AMS Resource, Inc. - Alloy, Metal & Steel Supplier

8740 / E8740 Nickel-Chromium-Molybdenum Alloy Steel

Description

AISI 8740 is a Standard grade Alloy Steel. It is commonly called AISI 8740 Nickel-chromium-molybdenum steel

Chemical Composition: Carbon 0.38 - 0.43, Chromium 0.4 - 0.6, Manganese 0.75 - 1, Molybdenum 0.2 - 0.3, Nickel 0.4 - 0.7, Phosphorus 0.035 max, Silicon 0.15 - 0.35, Sulphur 0.04 max

Applications

This steel is similar to 4140. It may be satisfactorily used for axles, tool joints, bits, core drills, reamer bodies, drill collars, piston rods, aircraft engine bolts, shapes, tubing, etc.

Specifications

UNS G87400 AISI 8740 Nickel-chromium-molybdenum alloy
AMS 6322n STEEL BARS, FORGINGS & RINGS
AMS 6323K MECHANICAL TUBING
AMS 6325G STEEL BARS & FORGINGS
AMS 6327G STEEL BARS & FORGINGS
AMS 6358F STEEL SHEET, STRIP & PLATE
AMS 7452M BOLTS & SCREWS, STEEL, LOW-ALLOY, HEAT TREATED, ROLL THREADED
AMS 7456J STUDS STEEL, LOW-ALLOY, HEAT-TREATED, ROLL THREADED
AMS 7496H RINGS, FLASH WELDED CARBON & LOW ALLOY STEELS
ASTM A-29 GENERAL REQUIREMENTS FOR CARBON & ALLOY BARS, WROUGHT & COLD-FINISHED
ASTM A-320 ALLOY STEEL BOLTING MATERIAL FOR LOW TEMPERATURE SERVICE
ASTM A-322 STEEL BARS, ALLOY, STANDARD GRADES STEEL BARS, ALLOY, STANDARD GRADES
ASTM A-331 STEEL BARS, ALLOY, COLD-FINISHED STEEL BARS, ALLOY, COLD-FINISHED
ASTM A-434 STEEL BARS, ALLOY, HOT-WROUGHT OR COLD FINISHED, QUENCHED AND TEMPERED
ASTM A-519 SEAMLESS CARBON & ALLOY MECHANICAL TUBING
ASTM A-521 STEEL, CLOSED-IMPRESSION DIE FORGING FOR GENERAL INDUSTRIAL USE
ASTM A-689 SPECIFICATION FOR CARBON AND ALLOY STEEL BARS FOR SPRINGS
ASTM A-711 STANDARD SPEC. FOR STEEL FORGING STOCK STANDARD SPEC. FOR STEEL FORGING STOCK
ASTM A-752 GENERAL REQUIREMENTS FOR WIRE RODS & COARSE WIRE, ALLOY STEEL
MIL-B-6812E BOLTS, AIRCRAFT
MIL-S-6049A STEEL, CHROME-NICKEL-MOLYBDENUM (8740) BARS & REFORGING STOCK (AIRCRAFT QUALITY)
SAE J1397 ESTIMATED MECHANICAL PROPERTIES & MACHINABILITY OF STEEL BARS
SAE J404 CHEMICAL COMPOSITIONS OF SAE ALLOY STEELS
SAE J412 GENERAL CHARACTERISTICS & HEAT TREATMENTS OF STEELS GENERAL CHARACTERISTICS & HEAT TREATMENTS OF STEELS

Available Forms

  • Bar
  • Forge
  • Hex Bar