General procurement guidance only. The applicable material standard, drawing, quotation and purchase specification control each order.
Buyer summary
There is no single best steel grade for every forged component. Grade selection depends on loading, wear, case or through-hardening requirements, section size, machinability, heat treatment and the controlling customer standard.
EN8 and EN8D
These carbon-steel designations are commonly considered for shafts, pins, studs and general engineering components. The exact standard, condition and mechanical requirements must match the drawing and processing route.
EN19
EN19 is used for higher-strength shafts, gears and engineering components after an appropriate heat-treatment route. It is often compared with chromium-molybdenum grades such as AISI 4140, but no automatic equivalence should be assumed.
EN24
EN24 is considered for highly loaded shafts, gears and components requiring a strong combination of strength and toughness. State the required condition, section properties, testing and governing standard.
20MnCr5
20MnCr5 is associated with carburised gears and transmission components where a hard case and suitable core are required. The buyer should define the carburising route, case requirements, core properties, machining allowance and distortion controls.
Forging steel vs cast steel
Forging and casting are manufacturing routes, not single steel grades. Forging typically refines grain flow through controlled deformation, while casting forms a component by solidifying molten metal in a mould. The correct route depends on component geometry, loading, quantity, inspection requirements and the approved engineering specification.
How to choose
Begin with the component drawing and service requirements. Confirm the controlling OEM or material standard, manufacturing route, section size, heat treatment, property values, test locations, inspection and documentation before selecting or approving a grade.
Continue to the relevant commercial page
Review the matching product or capability page, then send the exact grade, standard, dimensions, condition, quantity, testing, documentation and destination.