Pressure Vessel & Boiler Plate · pressure-vessel plate for reactor and column shells, heat-exchanger shells, boiler and steam drums, LPG and ammonia storage spheres, and hydrotreater vessels
1.1 This specification covers manganese-molybdenum and manganese-molybdenum-nickel alloy steel plates intended particularly for welded boilers and other pressure vessels. 1.2 Plates under this specification are available in four grades having different strength levels as follows: Grade and Tensile Strength Grade Tensile Strength, ksi [MPa] Type A75–95 [515–655]manganese-molybdenum B80–100 [550–690]manganese-molybdenum C80–100 [550–690]manganese-molybdenum-nickel D80–100 [550–690]manganese-molybdenum-nickel 1.3 The…
Specification text excerpt, reproduced for reference. Read the full ASME SA-302/SA-302M text →
| Elements | Grade B |
|---|---|
| Carbon, maxA / Up to 1 in. [25 mm], incl. in thickness / Over 1 to 2 in. [50 mm], incl. / Over 2 in. [50 mm] in thickness | 0.20 / 0.23 / 0.25 |
| Manganese: / Heat analysis / Product analysis | 1.15–1.50 / 1.07–1.62 |
| Phosphorus, max | 0.025 |
| Sulfur, max | 0.025 |
| Silicon: / Heat analysis / Product analysis | 0.15–0.40 / 0.13–0.45 |
| Molybdenum: / Heat analysis / Product analysis | 0.45–0.60 / 0.41–0.64 |
| Nickel: / Heat analysis / Product analysis | — |
Limits as specified in ASME SA-302/SA-302M. Where the standard sets different values by thickness or product analysis, each band is shown separately.
| Property | Grade B |
|---|---|
| Tensile strength, ksi [MPa] | 80–100 [550–690] |
| Yield strength, min, ksi [MPa] | 50 [345] |
| Elongation in 8 in. [200 mm], min, %A | 15 |
| Elongation in 2 in. [50 mm], min, %A | 18 |
Mechanical requirements for the thickness ranges shown. Impact testing is carried out at the temperature specified for the grade.
SA302 Gr.B is normally specified for reactor and column shells, heat-exchanger shells, boiler and steam drums, LPG and ammonia storage spheres, and hydrotreater vessels.
We supply it cut to size by plasma, laser or waterjet, with edges machined or flame-cut to your drawing, and can deliver in the heat-treatment condition your fabrication procedure requires.
Supplied in the heat-treatment condition the standard requires for the grade — as-rolled, normalized, normalized and tempered, or quenched and tempered. Simulated post-weld heat treatment can be carried out and reported before shipment.
Mill test certificate to EN 10204 3.1 / 3.2; Ultrasonic testing to EN 10160 (S1–S3) or ASTM A578; HIC to NACE TM0284 and SSC to NACE TM0177; Simulated post-weld heat treatment (PWHT) on request; Third-party inspection by SGS, BV, TÜV or Intertek
Seaworthy packing — bottom skids, steel strapping, VCI film and edge protection — is standard for sea freight. Container loading plans with piece weights are issued before shipment.
Send the grade or the standard you specify, the thickness range, quantity and destination port. We reply with price, lead time, delivery term and the applicable certificate within 12 hours (Mon–Sat, GMT+8).
