Boiler steel plate A516 Gr55

Carbon steel plate for moderate and lower temperature service. Maximum plate thickness is only limited by the capacity of the composition to meet the specified mechanical property requirements; however, current production of ASTM A516 Grade 55 plates are normally limited to maximum thickness of 12 in. (305 mm).

Technical Requirements & Additional Services:

  • High tension test
  • Low temperature impacting test
  • Normalised for thick plates over 40mm
  • Simulated post-welded heat treatment (PWHT)
  • Rolling under standard NACE MR-0175 (HIC+SSCC)
  • Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
  • Shot blasting and Painting,Cutting and welding as per end user’s demands

Mechnical property for A516 Grade 55 boiler steel:


Yield strength (Mpa) Tensile strength (Mpa) Elongation in ≥,%
205 380-515 200mm 50mm
23 27

ASTM A516 is a PVQ carbon steel plate intended primarily for service in welded pressure vessels at moderate or lower temperatures, where notch toughness is important.


Chemical composition for A516 Grade 55 boiler steel (Product Analysis Max%)


Main chemical elements composition of A516 Grade 55
Thickness(mm) C Si Mn P S
T≤12.5 0.18 0.13-0.45 0.55-0.98 0.035 0.035
12.5<T≤50 0.20 0.55-1.30
50<T≤100 0.22
100<T≤200 0.24
T>200 0.26
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