NACE MR0103-2015 Hardness on BM after Weld Overlay
NACE MR0103-2015 Hardness on BM after Weld Overlay
(OP)
Dear all,
Reference is made to NACE MR0103-2015, clause 15.2.3
Quoting:
15.2.3 The base materials listed in Clause 13 or Clause 14 are also allowed as weld overlays, provided
they meet the provisions of their respective paragraphs after being applied as overlays. Following
application of the overlay, the base material shall meet the hardness requirement for that base metal
specified in the pertinent material paragraph or subclause within Clause 13 or Clause 14.
Unquoting
My question is practically:
When we apply Weld Overlay of Austenitic (Ferrous) or Nickel (Non-Ferrous) on - let's say - Carbon Steel of P Nr 1, should we perform Hardness Test on the Base Metal (P Nr 1), on its non-weld overlaid side (external)? Does not really make any sense.
Or - as I understand it - the Weld Overlay Material should have after its weld overlay application, the maximum Hardness value prescribed for it as if it was Base Material (plate for example)? The latter makes more sense...
I tried to do my best to express my question correctly, sorry if I have not succeeded it... But the standard also, is not so clear...
Reference is made to NACE MR0103-2015, clause 15.2.3
Quoting:
15.2.3 The base materials listed in Clause 13 or Clause 14 are also allowed as weld overlays, provided
they meet the provisions of their respective paragraphs after being applied as overlays. Following
application of the overlay, the base material shall meet the hardness requirement for that base metal
specified in the pertinent material paragraph or subclause within Clause 13 or Clause 14.
Unquoting
My question is practically:
When we apply Weld Overlay of Austenitic (Ferrous) or Nickel (Non-Ferrous) on - let's say - Carbon Steel of P Nr 1, should we perform Hardness Test on the Base Metal (P Nr 1), on its non-weld overlaid side (external)? Does not really make any sense.
Or - as I understand it - the Weld Overlay Material should have after its weld overlay application, the maximum Hardness value prescribed for it as if it was Base Material (plate for example)? The latter makes more sense...
I tried to do my best to express my question correctly, sorry if I have not succeeded it... But the standard also, is not so clear...
Only best result in absolutely necessary time





RE: NACE MR0103-2015 Hardness on BM after Weld Overlay
The hardness of the HAZ as well as the overlaid material should also be within the acceptable limits of the base metal.
RE: NACE MR0103-2015 Hardness on BM after Weld Overlay
why base ferrous material (e.g. CS) that is cladded/overlayed with SS and not in contact with wet H2S service still requires hardness limitation as per NACE MR0103 section 15.2.3 ?
regards