Bearing Steel · 534A99

EN31 (AISI 52100) Bearing Steel Round Bar Supplier in Mumbai

EN31 (BS 970 designation 534A99, traded as AISI 52100 or 100Cr6) is a high carbon chromium steel developed for anti-friction bearing components. Its high carbon and chromium content produce a fine, uniformly distributed carbide structure that hardens to very high surface hardness with good dimensional stability. It is supplied annealed for machining and hardened after. Available as round bar from our Darukhana stock, cut to size.

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Common Cross-references
BS 970
534A99
AISI / SAE
52100
DIN / EN
100Cr6 / 1.3505
IS 4398
103Cr1

Cross-references are not proof of interchangeability. Confirm the governing standard, condition, section size and required properties before ordering.

Supply Desk:Darukhana, Mazgaon
CHEMICAL COMPOSITION

EN31 Chemical Composition

ElementRange (per standard)
Carbon (C)0.90 – 1.20 %
Chromium (Cr)1.00 – 1.60 %
Manganese (Mn)0.30 – 0.75 %
Silicon (Si)0.10 – 0.35 %
Sulphur / Phosphorus0.05 % max each

Reference ranges vary by standard revision and exact designation. Confirm the purchase specification and use the Mill Test Certificate for the supplied heat.

MECHANICAL PROPERTIES

EN31 Properties & Condition

Mechanical properties for EN31
PropertyTypical Value
Hardness (hardened)Typically 62 – 64 HRC
Supply ConditionSpheroidise annealed
Wear ResistanceVery high
WeldabilityNot recommended

Mechanical properties depend on heat-treatment condition and section size. Confirm the required values against the governing order specification before purchase.

WHY THIS GRADE

Key Characteristics of EN31

  • Very high attainable hardness and wear resistance
  • Good dimensional stability after heat treatment
  • Fine carbide distribution suited to rolling contact fatigue
  • Machined in the annealed condition, then hardened
SECTOR USAGE

EN31 Applications

  • Ball and roller bearing races and rolling elements
  • Precision spindles and guide rollers
  • Punches, dies and forming tools
  • Wear plates and high-load bushings
Direct Procurement

Get a price on EN31

Send the diameter, cut length, quantity and delivery destination. Enquiries go straight to the family desk at the Darukhana yard.

What to include:

• Grade & required condition

• Diameter & cut length in mm

• Total quantity (pieces / kg)

• Delivery location

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Direct Yard Desk

Kalpesh & Ritesh Shah

Darukhana, Mazgaon, Mumbai

Mobile: +91 98200 23666

Hours: Monday to Saturday, 9:00 AM to 7:00 PM IST

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