1. Material: SA516Gr.70 + SB 443 UNS N06625
2. The material shall meet the requirements of ASME Sec. II, Part-A (Latest Edition with Addenda) and NACE MR0103 & HIC requirement.
3. Base material shall be in Normalized condition.
4. Base plate shall be with following limits by product analysis –
5. Carbon – 0.200% max.
6. Sulphur – 0.002% max.
7. Phosphorus – 0.008% max.
8. Oxygen -0.003% max.
9. Carbon equivalent (CE) – 0.43 max. with formula
CE = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
1.Cladding shall be done as per SA-264.
2.All clad plates shall be ultrasonically examined inn accordance with SA-578 with acceptance standard level-B and shall meet supplementary requirements of S1 and S7.Scanning shall be 100 % of the plate surface.
3.Shear test shall be conducted for all clad plates. Strength of bond shall be minimum 20,000 psi in shear.
4.Repair of cladding surface by welding shall not exceed 3% of surface area of individual plate.
5.The base material shall be produced to fine grain practice.
6.All plates shall be vacuum degassed.
7.Product analysis shall be carried out and reported.
8.All plates shall be ultrasonically tested as per ASTM A435.
9.Simulation heat treatment cycle
Soaking Temperature – 610 ± 10 o C
Holding Time – 3 hours for min PWHT
6 hours for max PWHT
Rate of Heating – 55 o C / hour above 300 o C
Rate of Cooling – 50 o C / hour up to 300 o C
1.The hardness shall not exceed 200 BHN in minimum PWHT condition.
2.All test results shall be mentioned on the test certificates.
3.Metal stamping on the plates shall be done with low stress stamp.
4.The tolerances in length, width and thickness shall be on the positive side only.
5.Inspection: Material test reports shall be in accordance with EN 10204 – 3.2
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