Alloy Steel Grades

Alloy steel grades are versatile grades that possess overall combinations of toughness, strength, fatigue strength, and wear resistance.

Alloy Steel GradesAlloy steels are made out of a lot of elements and metals that are alloyed together to create tough properties that are required in a very vast variety of applications in various industries. Alloy steel grades mostly have reasonable strength up to high temperatures at around 600o and even above as well as excellent atmospheric corrosion resistance. These alloy grades are almost ideal for multiple forgings to form very accurate sizes that are intended for a specific application. It is best advisable to forge certain alloy steel grades that are not below 1600°.

Alloy steel grades mainly fit for various applications like aerospace, agricultural and defense industries, myriad uses in automotive, gas industries, typical uses in shafts, spindles, and forged gears.

In addition, with its featured properties, alloy steel grades can undergo a lot of machining operations and conditions:

  • Heat Treatment
  • Annealing
  • Normalizing
  • Hardening
  • Tempering
  • Welding

Their machinability is highly permitted with its optimum structure. Since alloy steel grades possess good weldability, they can be forged easily through any commercial methods.

4120 has good tough strength properties used for forging applications as forged valve bodies and pumps
4125 a chromium-molybdenum alloy steel, displays good strength and toughness properties automotive and engineering gear, engine construction – steering knuckles, forged crankshafts, etc.
4130 readily machineable, weldable and ductile, has tough strength commercial and military aircraft, machine tools, automotive, hydraulic tools, aerospace, auto racing
4135 low-alloy steel, capable of being heat treated and has reasonable toughness forged shafts, fixtures, collars, jigs, spindles
4140 provides good hardness penetration, wear resistant, tough and ductile highly stressed parts, or components subjected to severe wear
4142 medium-carbon steel, readily heated and has tough strength die holders, forged gears, collets, spindles, arbors, flanges, axles, clutch parts, etc.
4145 a chromium-molybdenum low alloy steel, readily forged, welded, and machined drill collars, shafts, forged gears, rolls for paper mills, tool holders and pump shafts
4150 low-alloy steel, has good atmospheric corrosion resistance and strength forgings in the aerospace, gas, and oil industries, forged gears, shafts, and spindles
4340 nickel-chromium molybdenum alloy, has high toughness and fatigue strength commercial and military aircraft, machine tool applications, automotive systems, forged steel crankshafts
52100 high carbon, chromium alloy steel for highly stressed parts like aircraft bearing
6150 fine grained carbon-chromium alloy steel, highly abrasion resistant gear and engine construction, forged crankshafts, connecting rods, pump and gear shafts, spindles and steering knuckles
8620 most widely used carburizing alloy, has high core strength forged camshafts, gears, and fasteners
8740 nickel-chromium low alloy steel, has tough strength properties high-strength forged fasteners
9310 low alloy steel, has good hardenability and fatigue strength crankshafts, heavy-duty gear shafts, gears in truck and aircraft construction