52100

Description:

52100 is a high carbon, chromium containing low alloy steel that is through hardening and noted in particular for use as bearings.

APPLICATIONS:

Used in roller bearings, rolls for metal, plastics, linoleum, etc crushing rings, blanking dies, punches, forming tools, lathe centres, gauges, cams, bushes marking dies, master hobs, hand taps.

Related specifications:

Germany      DIN 17230 WS 1.3505

Great Britain   BS: 2S135, 535A99

                EN31

Japan         SUJ2/STB2/SKF3

U.S.A.       AISI/SAE 52100

France        AFNOR 35-565 100C6

Chemical Composition(%):

Carbon       0.95-1.10

Silicon       0.15-0.35

Manganese   0.25-0.45

Chromium    1.35-1.65

Phosphorous  0.03 max

Sulphur      0.03 max

Delivery condition: Spheroidized annealed

Process:  EAF+LF+VOD+Forged or Rolled+Heat Treatment(optional)

SIZE RANGE:

Round:

Hot Rolled:  8mm-500mm

Hot Forged:  80mm -1200mm

Flat:

Hot rolled: Thickness: 20-130mm  Width: less than 610mm

Hot forged: Thickness: 150-600mm Width: up to 1600mm

SURFACE FINISHES:

Black, Peeled (K12), Cold Drawn, Turned & Polished (H10, H11), Precision Ground (H9, H8)

COLOUR CODE: Black and Brown

Ultrasonic test: according to SEP 1921-84 3C/c

Machinability:

Machinability of 52100 alloy is good by conventional methods. A spherodizing anneal at 1200 F before machining will improve the overall machinability of the alloy.

Forming         

52100 may be formed by all conventional methods, including cold forging or stamping and hot or cold upset forming.

Heat Treatment         

Heat treatment consists of heating to 1500 F followed by an oil quench for through hardening of the alloy. A normalizing heat treatment at 1600 F and slow cooling, to relieve machining stress, may be employed prior to the 1500 F and quench treatment.

Forging         

The alloy may be supplied as forgings and also may be subsequently forged at 2200 F down to 1700 F

Hot Working         

Hot working, such as upsetting, may be done in the range of 400 to 1000 F.
Cold Working         

The alloy has good ductility and may be cold worked in the annealed or normalized conditions by conventional methods.

Annealing         

Anneal at 1600 F and slow cool to relieve machining or cold working strains.
Tempering         

Temper at 400 F.
Hardening         

The alloy hardens from cold working or by heating and quenching - see "Heat Treatment". It also may be carburized at 1675 F and quenched after sufficient time for carburization. A second heating to 1450 F and second quench from that temperature should be used.

Certificate of Quality: issued in English, in addition the normal terms, production process, the mechanical property (yield strength, tensile strength, elongation and hardness), forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.

Marking: Heat No. will be cold stamped and Steel grade, diameter (mm), length (mm), and  the manufacturer LOGO and weight (kg) is painted

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