EN31 SAE 52100 bearing steel is widely used for bearing races, balls, rollers and other precision components where high hardness and fatigue resistance are required. EN31 SAE 52100 bearing steel is a high carbon, high chromium through-hardening steel used for ball and roller bearings. It is known internationally as SAE 52100, AISI 52100 or 100Cr6. … Read more
Three forms of semi-finished steel sit between the steelmaking furnace and the finished component: the ingot, the bloom, and the billet. Every forge shop, ring roller, bar mill, and heavy engineering manufacturer works from one or more of these forms – and the choice of which to use is a decision with direct consequences for … Read more
When a re-roller specifies alloy steel billets for bearing rings, or a forge shop orders billets for critical automotive transmission components, the purchase order chemistry column tells only part of the story. A billet reading 0.38–0.45% C, 0.80–1.10% Cr, and 0.15–0.25% Mo – squarely within an AISI 4140 specification – can be either a reliable … Read more
If you work in forging, ring rolling, re-rolling, or bar manufacturing, you deal with semi-finished steel products every day. But when a supplier asks whether you need billets or blooms, do you know exactly what differentiates the two — and which one your process actually requires? The terms are often used interchangeably in casual conversation, … Read more