Mechanical Testing of Carbon Steel Plates as per ASME Section II-A

[JASPAL SINGH]

Dear 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 .

Regards

Jaspal Singh, CWI-AWS, CSWIP-3.1
Assistant Manager – Quality Assurance
Process Equipment Division
ISGEC, Yamuna Nagar, Haryana -135001
Phone: 911732307251
Ext: 251 Mb: +91 9996624244

[Bathula Raghuram (Mumbai - PIPING)]

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.

[Chaitanya Purohit]

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).