A turning insert for longitudinal external turning of hardened steel, comprising: a top surface, an opposite bottom surface, a first side surface, an opposite second side surface, a front surface, an opposite rear surface, wherein the top and bottom surfaces (2, 3) are connected by the first side surface, the second side surface, the front surface, and the rear surface; a longitudinal axis intersecting the front and rear surfaces (6, 7), the longitudinal axis extending mid-way between the first and second side surfaces (4, 5); a cutting edge comprising cubic boron nitride, the cutting edge being at least partly formed at an intersection between the top surface and the front surface; the cutting edge comprising a forward point intersecting the longitudinal axis in a top view, a tangent line of the cutting edge at the forward point extending in a top view perpendicular to the longitudinal axis; the turning insert being symmetrical or substantially symmetrical in a top view in relation to the longitudinal axis; the turning insert comprising a head portion connected to a stem portion, wherein a greatest width of the head portion is greater than a greatest width of the stem portion where said widths (11, 12) are measured perpendicular to the longitudinal axis; the head portion comprising the cutting edge; the head portion comprising a land portion adjacent to the cutting edge; the cutting edge comprising a surface generating cutting edge comprising the forward point; in a top view the surface generating cutting edge being straight or convexly curved at a radius of curvature greater than 50mm; characterised in that the cutting edge comprises two major cutting edge portions (17, 18) located on opposite sides of the surface generating cutting edge, each major cutting edge portion (17, 18) extending between an axially forward point (19, 20) and an axially rearward point (21, 22), wherein a distance from each axially forward point (19, 20) to the longitudinal axis is shorter than a distance from each axially rearward point (21, 22) to the longitudinal axis; and wherein each major cutting edge portion (17, 18) forms an angle (B1, B2) of 5-20° in relation to the tangent line of the cutting edge at the forward point. a top surface, an opposite bottom surface, a first side surface, an opposite second side surface, a front surface, an opposite rear surface, wherein the top and bottom surfaces (2, 3) are connected by the first side surface, the second side surface, the front surface, and the rear surface; a longitudinal axis intersecting the front and rear surfaces (6, 7), the longitudinal axis extending mid-way between the first and second side surfaces (4, 5); a cutting edge comprising cubic boron nitride, the cutting edge being at least partly formed at an intersection between the top surface and the front surface; the cutting edge comprising a forward point intersecting the longitudinal axis in a top view, a tangent line of the cutting edge at the forward point extending in a top view perpendicular to the longitudinal axis; the turning insert being symmetrical or substantially symmetrical in a top view in relation to the longitudinal axis; the turning insert comprising a head portion connected to a stem portion, wherein a greatest width of the head portion is greater than a greatest width of the stem portion where said widths (11, 12) are measured perpendicular to the longitudinal axis; the head portion comprising the cutting edge; the head portion comprising a land portion adjacent to the cutting edge; the cutting edge comprising a surface generating cutting edge comprising the forward point; in a top view the surface generating cutting edge being straight or convexly curved at a radius of curvature greater than 50mm; characterised in that the cutting edge comprises two major cutting edge portions (17, 18) located on opposite sides of the surface generating cutting edge, each major cutting edge portion (17, 18) extending between an axially forward point (19, 20) and an axially rearward point (21, 22), wherein a distance from each axially forward point (19, 20) to the longitudinal axis is shorter than a distance from each axially rearward point (21, 22) to the longitudinal axis; and wherein each major cutting edge portion (17, 18) forms an angle (B1, B2) of 5-20° in relation to the tangent line of the cutting edge at the forward point.