ASTM A 204 gr. A,A 204 gr.B, A 204 gr.C Steel with Cr., Mo.,Cr-Mo.

A204 Standard Specification for Pressure Vessel Plates, Alloy Steel, Molybdenum

1. Steel Grade:A 204 Grade A, A 204 Grade B, A 204 Grade C

2. Specification:

Maximum Thickness: A 204 Grade A , B: 150mm A 204 Grade C : 100mm Width: 1500mm to 4020mm Length: 3000mm to 18000mm

3. Referenced Documents in producing steel.

A 20/A 20M A 435/A 435M A 577/A 577M A 578/A 578M

4. Heat Treatment

Plates 40 mm and under in thickness are normally supplied in the as-rolled condition Plates over 40 mm in thickness shall be normalized. The steel shall be killed。

5. Chemical Composition and property.

A: Chemical detail of each grade see A 204/A 204M – 03 B: Property in the following: Tensile strength : min 450-655Mpa Yield Strength : min 255-295Mpa Elongation : 20-23%

6. Mechanical Requirements

The steel shall conform to the chemical requirements

7. SUPPLEMENTARY REQUIREMENTS

S1. Vacuum Treatment, S2. Product Analysis, S3. Simulated Post-Weld Heat Treatment of Mechanical Test Coupons, S4.1 Additional Tension Test, S5. Charpy V-Notch Impact Test, S6. Drop Weight Test, S7. High-Temperature Tension Test, S8. Ultrasonic Examination in accordance with Specification A 435/A 435M, S9. Magnetic Particle Examination, S11. Ultrasonic Examination in accordance with Specification A 577/A 577M, S12. Ultrasonic Examination in accordance with Specification A 578/A 578M, S17. Vacuum Carbon-Deoxidized Steel.

8. Application Fields: This specification covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressure vessels.

9. Trade Terms: FOB, CFR, CIF , CNF.

10. Payment Terms: T/T, 100% Irrevocable at sight L/C

11. Delivery Time: 30-35days

12. Services of Steel: Cutting, Welding, Painting , Ball blast and others processing according to customers requirement.