Product Overview
ASTM A204 Alloy Steel Plate for Pressure Vessel is a molybdenum-alloy steel manufactured to ASTM A204/A204M standards. It provides good elevated-temperature strength, reliable weldability, and stable mechanical properties, making it suitable for pressure equipment requiring consistent performance under demanding operating conditions.
Specifications
A204 Vessel Plate Chemical Composition
|
Elements Composition % |
Grade A |
Grade B |
Grade C |
|
Carbon, max: |
|||
|
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 |
0.025 |
0.025 |
0.025 |
|
Sulfur, max |
0.025 |
0.025 |
0.025 |
|
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 |
A204 Boiler Plate Mechanical Property
|
Mechanical Property of ASTM A204 steel plate |
Grade A |
Grade B |
Grade C |
|
Tensile strength, ksi [MPa] |
65-85 [450-585] |
70-90 [485-620] |
75-95 [515-655] |
|
Yield strength, min, ksi [MPa] |
37 [255] |
40 [275] |
43 [295] |
|
Elongation in 8 in. [200 mm], min, % |
19 |
17 |
16 |
|
Elongation in 2 in. [50 mm], min, % |
23 |
21 |
20 |
A204 Pressure Vessel Steel Equivalent Steel Grade
|
ASTM |
GB |
JIS |
DIN |
EN |
|||||
|
Steel Grade |
Steel Grade |
Steel Grade |
Standard Number |
Steel Grade |
Material Number |
Standard Number |
Steel Grade |
Material Number |
Standard Number |
|
A204-Gr. A.B |
16Mo |
16Mo |
G3103 |
15 Mo3 |
1.5415 |
DIN17155 |
16Mo3 |
1.5415 |
EN 10028-2 |
Technical Performance
Formulated with precise Molybdenum alloying (0.45%–0.60%) to deliver long-term structural stability in elevated temperature environments up to ~480°C.
Manufactured via LF+VD vacuum degassing processes to maintain low sulfur and phosphorus impurities, minimizing internal defects for high-pressure safety.
Designed with a controlled carbon equivalent to maintain favorable weldability and reduce preheating requirements during pressure vessel fabrication.
Produced to meet ASTM A204 / ASME SA204 specifications, with available 100% ultrasonic testing under ASTM A578 or A435 standards.
Delivers consistent mechanical strength across Grades A, B, and C with tensile strength range options from 450 MPa to 655 MPa.
Manufacturing Range & Value-Added Processing Services
Available Thickness: 6 mm to 150 mm
Available Width: 1500 mm to 3800 mm
Available Length: 6000 mm to 12000 mm (Custom lengths available upon request)
Value-Added Processing: Precision Flame / Plasma Cutting, Beveling for Welding Preparation, Surface Shot Blasting (SA 2.5), Shop Priming, Bending, and Hole Drilling.
Ordering Guide & Technical Options
Dimensional Tolerances: Strictly compliant with ASTM A20 / A20M (Class A, B, or C under-thickness tolerances upon agreement).
Edge Condition: Mill Edge or Cut Edge (Plasma/Flame Cut) as specified.
Heat Treatment Options: As-Rolled, Normalizing (N), Stress Relieving (SR), or Normalized & Tempered (N+T) according to thickness and vessel design code.
Supplementary Requirements (ASTM A20):
- S1: Vacuum Treatment
- S2: Product Analysis
- S3: Simulated Post-Weld Heat Treatment (PWHT)
- S5: Charpy V-Notch Impact Test (Low Temperature)
- S8: Ultrasonic Examination (UT)
- S12: Through-Thickness Tension Test (Z-Direction: Z15/Z25/Z35)
Proven Industry Applications
Petrochemical Refineries: Shell plates, dished heads, and tube sheets for high-temperature hydrocracking reactors and catalytic reformers.
Power Generation: Steam drums, high-pressure header walls, and steam separator vessels in utility power plants.
Industrial Gas & Chemical Storage: Spherical LPG storage tanks, pressure vessels, and medium-temperature pressure piping assemblies.
Heat Exchangers: Shell-and-tube heat exchanger shells operating under continuous thermal cycling.
Quality Assurance & Traceability
MTC Compliance: Issued strictly in accordance with EN 10204 3.1 (or 3.2 upon request).
Traceability: Heat number, plate number, and grade are permanently hard-stamped on each plate surface.
Mill Test Reports Include: Chemical heat/product analysis, tensile/yield testing, elongation, and NDT/UT test result attachments.
Mill Capability & Export Packaging
Production Line: Advanced 4.2m Heavy Plate Rolling Mill with automated gauge control and inline heat treatment furnaces.
Lead Time: 15 – 30 days for standard stock/production.
Packaging: Bare plates, oiled, edge protectors applied, bundle-strapped for ocean transport. Seaworthy packaging suitable for containerized (20GP/40GP) or bulk vessel shipping.
FAQ
Hot Tags: a204 alloy steel plate for pressure vessel, China a204 alloy steel plate for pressure vessel manufacturers, suppliers, factory, A204 Alloy Steel Plate For Pressure Vessel, A537 Pressure Vessel Steel Plate, ASME SA537 CL 2 Bolier Pressure Vessel, ASTM A612 A612M Pressure Vessel Steel Plate, astm asme pressure vessel steel, SA387 Alloy Steel Pressure Vessel Plates
