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52100/DIN1.3505/535A99/EN31/SUJ2/STB2/SKF3/100C6/100Cr6
 

Description:

EN31 is a high carbon alloy steel which achieves a high degree of hardness with compressive strength and abrasion resistance.

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+Rolled+Heat Treatment(optional)

SIZE RANGE:

Round:

Hot Rolled: 8mm-500mm

Flat:

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

SURFACE FINISHES:

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

COLOUR CODE: Yellow End

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

Annealing:
Heat uniformly to 800°C, equalise, then furnace cool. (Hardness about 229 Brinell).
Stress Relieving:
If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 700°C, equalise, then cool slowly.
Hardening:
Heat uniformly to 800/820°C until heated through. Allow 30 minutes per inch of ruling section and quench immediately in oil.
Tempering:
Heat uniformly and thoroughly at the selected tempering temperatures and hold for at least one hour per inch of total thickness.

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