green-building

Project Description

SA-204  Pressure Vessel Plates

This carbon / molybdenum grade is used almost exclusively in Refinery / Petrochemical applications. The “lean alloy” characteristics of this grade lends itself to use in pressure vessels, fittings, and custom fabricated pipe and other environments within moderate temperature ranges.

Chemical Requirements

Elements Composition %
Grade A Grade B Grade C
Carbon, maxA:
  up to 1 in. [25 mm] incl. in thickness 0.18 0.20 0.23
  Over 1 in. to 2 in [50 mm] incl. in thickness 0.21 0.23 0.26
  Over 2 in. to 4 in. [100 mm] incl. in thickness 0.23 0.25 0.28
  Over 4 in. [100 mm] incl. in thickness 0.25 0.27 0.28
Manganese, max:
  Heat analysis: 0.90 0.90 0.90
  Product analysis: 0.98 0.98 0.98
Phosphorus, max A 0.035 0.035 0.035
Sulfur, max A 0.040 0.040 0.040
Silicon:
  Heat analysis 0.15-0.40 0.15-0.40 0.15-0.40
  Product analysis 0.13-0.45 0.13-0.45 0.13-0.45
Molybdenum:
  Heat analysis 0.45-0.60 0.45-0.60 0.45-0.60
  Product analysis 0.41-0.64 0.41-0.64 0.41-0.64

AApplies to both heat and product analysis