General Information

40NiCrMo7-3 is a quench and tempering steel with high toughness. Used for large axles, machine componenets etc. that require high tensile strength and high toughness. Can be flame or induction hardened.

6514 in intended for ASTM A320 L43 fasteners in low-temperature service.

Ovako 355B The grade is inside the SAE 4340 specification but is slightly enhanced with Vanadium for improved tempering resistance. The grade has a low controlled sulphur content to ensure machinability yet with a high sulphidic cleanliness. Oxygen content is kept low for high oxidic cleanliness. The steel is of Bearing Quality cleanliness (BQ).

Through hardenability corresponding to a bar with approx. Ø100mm (oil quenching)

Delivered in as-rolled, soft annealed, normalized or quench and tempered condition

 BQ-Steel® 

(Bearing Quality) is a bearing quality clean steel optimized for fatigue strength by a strict control of steel cleanliness. BQ-steel is also ideal for new design solutions in a wide array of demanding applications outside the bearing industry that require longer performance and higher loads. The BQ-steel offer is the result of the Ovako clean steel program. Purity of production means that the material has significantly smaller inclusions compared to conventional steel and, as a result, the fatigue strength of the steel is increased dramatically. Use of the material allows components to be manufactured in smaller sizes. The BQ-steel  has for decades been the problem-solver.

Similar designations

AISI 4340