EN31 Bearing Steel Rounds
BS 535A99 · AISI 52100 · DIN 100Cr6 (1.3505) · JIS SUJ2 · IS 103Cr1
EN31 Bearing Steel Rounds in ready stock at our Madurai godowns, annealed, Ø 10–250 mm. Band-saw cut to your sizes with mill test certificates on request.
I. Sizes & weights
Nominal weights at 7.85 g/cm³ · Ø 10–250 mm| Ø mm | kg / metre | kg / 6 m bar | |
|---|---|---|---|
| 10 | 0.62 | 3.70 | |
| 12 | 0.89 | 5.33 | |
| 16 | 1.58 | 9.47 | |
| 20 | 2.47 | 14.8 | |
| 25 | 3.85 | 23.1 | |
| 32 | 6.31 | 37.9 | |
| 40 | 9.86 | 59.2 | |
| 50 | 15.4 | 92.5 | |
| 63 | 24.5 | 146.8 | |
| 80 | 39.5 | 236.8 | |
| 100 | 61.7 | 369.9 | |
| 125 | 96.3 | 578.0 | |
| 160 | 157.8 | 947.0 | |
| 200 | 246.6 | 1,479.7 | |
| 250 | 385.3 | 2,312.0 |
II. Chemical composition (% by weight)
| Element | C | Si | Mn | Cr | S |
|---|---|---|---|---|---|
| Min | 0.90 | 0.10 | 0.30 | 1.00 | – |
| Max | 1.20 | 0.35 | 0.75 | 1.60 | 0.040 |
Typical standard ranges. Every mill lot ships with its own test certificate on request.
III. Mechanical properties
- Annealed
- 229 HB max
- Hardened
- 60–63 HRC
- Tensile (ann.)
- 750 MPa
- Use
- Through-hardening
IV. Supply condition
- Condition
- Annealed
- Machinability
- Fair (annealed)
- Forms
- round
- Cutting
- Band saw ±1 mm
- SKU
- SST-AES-06
V. Weigh it, then request it.
Locked to EN31EN31 · 7.85 g/cm³
W = π × D² × L × ρ ÷ 4,000,000 · ρ = 7.85 g/cm³ · rounded to 0.1 kg. Theoretical weight; actual mill weight can vary by ±2–3%.
Bearings, rollers, punches, gauges
About EN31
Can you cut EN31 to my sizes?
Yes. EN31 is band-saw cut to ±1 mm. Send piece sizes and quantities with your request; cutting is quoted with the material.
Is a mill test certificate provided with EN31?
An MTC is supplied with mill material on request, traceable to the heat number.
What sizes are in stock?
Ø 10–250 mm. For large tonnage, message us to reserve material.
What are the equivalents of EN31?
BS 535A99, AISI 52100, DIN 100Cr6 (1.3505), JIS SUJ2, IS 103Cr1. Equivalents are close matches; confirm against your drawing's specification.
