AS 1544.1:2003 pdf – Methods for impact tests on metals Part 1: lzod

AS 1544.1:2003 pdf – Methods for impact tests on metals Part 1: lzod.
5.4 Striker
The striker and its components shall comply with the following requirements:
(a) The striker shall be of hardened steel.
(b) The striker shall he attached rigidly to the pendulum and shall satisfy the following conditions, see Figure 1(a) and 1(b):
(i) Included angle of striker 75 ±1 degrees.
(ii) Radius of curvature of striking edge 0_S mm to [0 ium
(c) The striking edge shall he rounded with a smooth profile blending tangentially with the faces of the striker. The length of the striking edge shall be in accordance with Clause 4.5(g)
5.5 location of test piece and striker
When the test piece is mounted in the supports, the following conditions shall apply, see Figures 1(a) and 1(b):
(a) The test piece shall be clamped so that it is attached rigidly to the machine frame.
(b) The top surface of the clamped support block shall be parallel to the reference surface of the machine, within 2:1000.
(C) The longitudinal axis of the test piece shall be perpendicular to the top surface of the support block, within 0.5 degrees.
(d) The notch. which shall face the striker, shall be perpendicular to the plane of swing of the pendulum. and the plane of symmetry of the notch shall coincide with the top surface of the support block, within ±0.1 mm.
NOTE: Some commonly used setting gauges require the surface of the clamp on which they slide to be coplanar with the top surface of the support block.
(e) The point of impact shall he 22 ±0.5 mm above the top surface of’ the support block.
(f) When the striker edge is contacting the test piece, the angle between the underside of the striker and the adjacent face of the test piece shall be 100 ±1 degrees.
(g) l,rhen contacting the test piece, the striking edge, which shall extend beyond both side faces of the test piece, shall be—
(i) perpendicular to the longitudinal axis of the test piece within 2 degrees:
(ii) for square-section and rectangular-section test piece. parallel to the bearing surface of the location groove in the support block. within 3:1000: and
(iii) for circular-section test pieces, parallel to the vertical plane containing the root of the notch, within 0.5 degrees.