AISI 4330V MODIFIED

• Applications

  Oil & Gas Industry

  • Drill collars, heavy-weight drill pipes, tool joints, subs
  • Drilling jars, fishing tools, and other downhole components
  • Wellhead equipment, blowout preventers, valves for high-pressure service

  Aerospace

  • Bolting and fasteners for critical joints
  • Airframe components and landing gear fittings
  • Engine shafts, gears, and other high-load structural parts

  Heavy Machinery & Industrial Equipment

  • Forged components for turbines, rotors, and hydraulic presses
  • Tool holders, reamers, drill shoes, crossovers, and subs
  • High-stress machine parts requiring excellent toughness

  Defense & Automotive

  • Components for armored vehicles and defense systems
  • Racing and heavy-duty automotive parts such as axles, gearboxes, and drive shafts

• Heat Treatment & Weldability

  Heat Treatment

  Hardened at 840 to 870°C and tempered at 600°C.

  Weldability

  Better than AISI 4145, but still challenging.

• Chemical Composition

  Weight %	C	Si	Mn	Cr	Mo	Ni	V	S	P
  Min.	0,28	0,20	0,75	0,70	0,35	1,65	0,05
  Max.	0,33	0,35	1,00	0,95	0,50	2.00	0,10	0,025	0,025

• Product Standards

  Product Standards: ASTM A29/ 29M (4330V)

• Mechanical Properties: Bar

  	Yield strength Rp0.2, MPa	Tensile strength Rm, MPa	Elongation [%]	Hardness [HBW]	Impact, Charpy-V, -20ºC [J]
  Min. (150 ksi)	1034	1138	15	341-388	32

Stocked products and dimensions

• 

  Round Bar – MIN YLD 150 KSI

  (30-36 HRC)

  DIA
  63 mm
  95,25 mm
  110 mm
  152 mm
  180 mm
  220 mm
  254 mm
  285 mm
  305 mm
  320 mm
  356 mm
  203,2 mm
  406,5 mm
  20”

   

  * NS1 THROUGH THICKNESS HARDNESS