There are many factors (production variables) which may cause changes in mechanical properties of the material during rolling, cooling, Heat treatment, etc.
If one mother plate is rolled and divided into several plates then one mechanical test is acceptable. (but in that case thickness of all plate will be same).
Heat treatment condition will be different (supply condition) for thicker plates.
Simulation test shall be done on each plate (mother plate at least if used).
-- If one mother plate is rolled and divided into several plates then one mechanical test is acceptable. (but in that case thickness of all plate will be same).
Heat treatment condition will be different (supply condition) for thicker plates.
Simulation test shall be done on each plate (mother plate at least if used).
On 24 September 2010 12:01, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:
SA 20 requires Mechanical testing on each plate as rolled (not per heat), mills provide plate numbers in addition to heat number on MTC and each plate will be individually tested.plate-as-rolled — the unit plate, as hot-rolled, prior to subdividing (if applicable) or any finishing operation.-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of JASPAL SINGH
Sent: Friday, September 24, 2010 12:18 PM
To: Materials & Welding
Subject: [MW:7177] Mechanical Testing of Carbon Steel Plates as per ASME Section II-ADear All ,This is with reference to requirement of Mechanical Testing as per SA-20. In one of my equipment following thickness of SA 516 Gr 70 will be used : 16mm, 30mm, 45mm, 60mm, 90mm, 85mm.Q1. If the mill produce all the above thicknesses from same heat, do we need to ask for mechanical testing of each thickness as per code or testing of any one plate will represent the all above thicknesses.Q2. If simulation requirement is different for 16mm & 30mm Thick (10hours) and 12 hour for others. The requirement is in as delivered condition and after simulated heat treatment. Whether one test on any thickness in as delivered and two different test for different simulation will be OK or not .RegardsJaspal Singh, CWI-AWS, CSWIP-3.1Assistant Manager – Quality AssuranceProcess Equipment DivisionISGEC, Yamuna Nagar, Haryana -135001Phone: 911732307251Ext: 251 Mb: +91 9996624244
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