Steel 75 dia x 110 mm ( En36A )-Lathe-Mill-Model-Mill-Bike-O

Typical Analysis

C = 0.13%

Si = 0.20%

Mn = 0.45%

Ni = 3.50%

Cr = 0.80%

S = 0.025%

P = 0.025%

Description Chromium, Nickel Case Hardening steel for applications requiring excellent wear surface, fatigue resistance and high toughness and core strength. In particular medium to large cross sections. Generally supplied in the annealed condition. It can also be used (uncarburised) as a high tensile steel, which when suitably hardened and tempered can be utilized for various applications requiring good tensile strength and excellent toughness. In the annealed the condition it has very good machinability and all operations such as turning, drilling,milling and tapping etc. can be carried out satisfactorily.

Applications. Highly stressed large and medium components for Motor Vehicle and general engineering purposes where surface hardness combined with good core strength is required. EN36A (carburized) is used extensively by all industry sectors for components and shafts requiring high surface wear resistance, high core strength and impact properties. Typical uses are: Heavy Duty Bushings, Collets, Conveyor Pins, Heavy Duty Gears, Gear wheels, King Pins, Crankshaft, Gear shafts, Ring Gears, Sprockets, Shafts etc..

Heat Treatment.

Forge 850 – 1050 C. Cool in furnace.

Normalize 850 – 880 C. Air cool.

Anneal 650 – 700 C. Cool slowly in controlled furnace.

Carburize 900 – 950 C. Furnace or Air cool.

Core Refine 800 – 880 C. Oil quench or Air cool.

Harden 760 – 780 C. Oil quench.

Temper 180 – 210 C. Air cool.

Anneal Hardness. 229 HB max

Nitriding 490 oC - 530 oC slow cooling (no quench), reducing distortion.

Welding Parts should be welded before Carburizing and Hardening. Preheat to 250 – 350 C. Filler metals – FOX DCMS-KB or FOX 2.5 Ni electrodes. DCMS wire.