British-standard carbon & alloy engineering steels stocked for shafts, gears and general machine components.
"EN Series" refers to the British Standard (BS970) family of carbon and alloy engineering steels — EN8, EN9, EN19, EN24 and EN31 are the ones we keep in stock. Each is a different composition suited to a different job: EN8 and EN9 are workhorse medium-carbon steels for general shafts and components; EN19 is a chromium-molybdenum steel used where higher strength after heat treatment is needed; EN24 is a nickel-chromium-molybdenum grade for highly stressed components; EN31 is a bearing steel that hardens to a very high, wear-resistant surface.
These grades are used because they're well documented, consistently machinable, and heat-treat predictably — an engineering shop can specify EN19 or EN24 knowing exactly what strength and toughness they'll get after hardening and tempering.
We stock the common EN grades in round bar, cut to length on request.
| BS970 Grade | Nearest AISI Equivalent | Typical Hardness | Typical Delivery Condition |
|---|---|---|---|
| EN8 | AISI 1040 | ~200–230 HB (as rolled/normalized) | Black bar / normalized |
| EN9 | AISI 1055 | ~220–250 HB (as rolled/normalized) | Black bar / normalized |
| EN19 | AISI 4140 | 27–35 HRC (hardened & tempered) | Hardened & tempered / black bar |
| EN24 | AISI 4340 | 28–36 HRC (hardened & tempered) | Hardened & tempered / black bar |
| EN31 | AISI 52100 | 60–64 HRC (hardened) | Annealed (soft) as supplied |
Density (all grades): approx. 7.85 g/cm³. Composition and exact hardness vary by grade and heat — refer to the mill test certificate accompanying each lot.
Call or WhatsApp us directly — most sizing and stock queries get answered same day.
© {{ copyrightYear }} Alloy Steel India Agency. All Rights Reserved.