SPECIFICATION FOR PRESSURE VESSEL PLATES, ALLOY STEEL, HIGH-STRENGTH, QUENCHED AND TEMPERED
(Identical with ASTM Specification A517/A517M-17 except for the addition of Footnote A to Boron in Table 1.)
1. Scope
1.1 This specification covers high-strength quenched and tempered alloy steel plates intended for use in fusion welded boilers and other pressure vessels.
1.2 This specification includes a number of grades as manufactured by different producers, but all having the same mechanical properties and general characteristics.
1.3 The maximum thickness of plates furnished under this specification shall be as follows:
| Grade | Thickness |
|---|---|
| A, B | 1.25 in. [32 mm] |
| H, S | 2 in. [50 mm] |
| P | 4 in. [100 mm] |
| F | 2.50 in. [65 mm] |
| E, Q | 6 in. [150 mm] |
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system is to be used independently of the other without combining values in any way.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
- A20/A20M Specification for General Requirements for Steel Plates for Pressure Vessels
- A435/A435M Specification for Straight-Beam Ultrasonic Examination of Steel Plates
- A577/A577M Specification for Ultrasonic Angle-Beam Examination of Steel Plates
- A578/A578M Specification for Straight-Beam Ultrasonic Examination of Rolled Steel Plates for Special Applications
3. General Requirements and Ordering Information
3.1 Plates furnished to this material specification shall conform to Specification A20/A20M. These requirements outline the testing and retesting methods and procedures, permissible variations in dimensions, and mass, quality and repair of defects, marking, loading, and ordering information.
3.2 In addition to the basic requirements of this specification, certain supplementary requirements are available where additional control, testing, or examination is required to meet end use requirements.
3.3 If the requirements of this specification are in conflict with the requirements of Specification A20/A20M, the requirements of this specification shall prevail.
4. Manufacture
4.1 Steelmaking Practice—The steel shall be killed and shall conform to the fine austenitic grain size requirement of Specification A20/A20M.
5. Heat Treatment
5.1 Except as allowed by 5.2, the plates shall be heat treated by heating to not less than 1150°F [620°C], quenching in water or oil and tempering at not less than 1150°F [620°C].
5.2 Plates ordered without the heat treatment specified in 5.1 shall be stress relieved by the manufacturer, and subsequent heat treatment of the plates to conform to 5.1 shall be the responsibility of the purchaser.
6. Chemical Requirements
6.1 The steel shall conform to the chemical requirements shown in Table 1 unless otherwise modified in accordance with Supplementary Requirement S17, Vacuum Carbon-Deoxidized Steel, in Specification A20/A20M for grades other than Grade A.
| Elements | Composition, % | |||||||
|---|---|---|---|---|---|---|---|---|
| Grade A | Grade B | Grade E | Grade F | Grade H | Grade P | Grade Q | Grade S | |
| Carbon: Heat analysis Product analysis |
0.15-0.21 0.13-0.23 |
0.15-0.21 0.13-0.23 |
0.12-0.20 0.10-0.22 |
0.10-0.20 0.08-0.22 |
0.12-0.21 0.10-0.23 |
0.12-0.21 0.10-0.23 |
0.14-0.21 0.12-0.23 |
0.10-0.20 0.10-0.22 |
| Manganese: Heat analysis Product analysis |
0.80-1.10 0.74-1.20 |
0.70-1.10 0.64-1.10 |
0.40-0.70 0.35-0.78 |
0.60-1.00 0.55-1.10 |
0.95-1.30 0.87-1.41 |
0.45-0.70 0.40-0.78 |
0.95-1.30 0.87-1.41 |
1.10-1.50 1.02-1.62 |
| Phosphorus, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 |
| Sulfur, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 |
| Silicon: Heat analysis Product analysis |
0.40-0.80 0.34-0.86 |
0.15-0.35 0.13-0.37 |
0.10-0.40 0.08-0.45 |
0.15-0.35 0.13-0.37 |
0.15-0.35 0.13-0.37 |
0.20-0.35 0.18-0.37 |
0.15-0.35 0.13-0.37 |
0.15-0.40 0.13-0.45 |
| Nickel: Heat analysis Product analysis |
... ... |
... ... |
... ... |
0.70-1.00 0.67-1.03 |
0.30-0.70 0.27-0.73 |
1.20-1.50 1.15-1.55 |
1.20-1.50 1.15-1.55 |
... ... |
| Chromium: Heat analysis Product analysis |
0.50-0.80 0.46-0.84 |
0.40-0.65 0.36-0.69 |
1.40-2.00 1.34-2.06 |
0.40-0.65 0.36-0.69 |
0.40-0.65 0.36-0.69 |
0.85-1.20 0.79-1.26 |
1.00-1.50 0.94-1.56 |
... ... |
| Molybdenum: Heat analysis Product analysis |
0.18-0.28 0.15-0.31 |
0.15-0.25 0.12-0.28 |
0.40-0.60 0.36-0.64 |
0.40-0.60 0.36-0.64 |
0.20-0.30 0.17-0.33 |
0.45-0.60 0.41-0.64 |
0.40-0.60 0.36-0.64 |
0.10-0.35 0.10-0.38 |
| Boron | 0.0025 max | 0.0005-0.005 | 0.001-0.005 | 0.0005-0.006 | 0.0005 min | 0.001-0.005 | ... ... |
... ... |
| Vanadium: Heat analysis Product analysis |
... ... |
0.03-0.08 0.02-0.09 |
B ... |
0.03-0.08 0.02-0.09 |
0.03-0.08 0.02-0.09 |
... ... |
0.03-0.08 0.02-0.09 |
... ... |
| Titanium: Heat analysis Product analysis |
... ... |
0.01-0.04 0.01-0.05 |
0.01-0.10 0.005-0.11 |
0.10 max 0.11 max |
0.10 max 0.11 max |
0.10 max 0.11 max |
... ... |
0.06 max 0.07 max |
| Zirconium: Heat analysis Product analysis |
0.05-0.15C 0.04-0.16 |
... ... |
... ... |
... ... |
... ... |
... ... |
... ... |
... ... |
| Copper: Heat analysis Product analysis |
... ... |
... ... |
... ... |
0.15-0.50 0.12-0.53 |
... ... |
... ... |
... ... |
... ... |
| Columbium (Niobium), max: Heat analysis Product analysis |
... ... |
... ... |
... ... |
... ... |
... ... |
... ... |
... ... |
0.06 0.07 |
A Applied to both heat and product analyses.
B May be substituted for part or all of titanium content on a one for one basis.
C Zirconium may be replaced by cerium. When cerium is added, the cerium/titanium ratio should be approximately 1.5 to 1 based on heat analysis.
D Columbium and niobium are interchangeable names for the same element and both names are acceptable for use in A01 specifications.
7. Mechanical Requirements
7.1 Tension Tests:
7.1.1 Requirements—The plates as represented by the tension-test specimens shall conform to the requirements given in Table 2.
| 2.50 in. [65 mm] and Under | Over 2.50 in. to 6 in. [65 to 150 mm] | |
|---|---|---|
| Tensile strength, ksi [MPa] | 115-135 (795-930) | 105-135 (725-930) |
| Yield strength, min, ksi [MPa] | 100 (690) | 90 (620) |
| Elongation in 2 in. [50 mm], min, %A: Reduction of area, min, %: Rectangular specimens Round specimens |
16 35 45 |
14 ... 45 |
A See Specification A20/A20M for elongation adjustment.
7.1.2 Test Methods:
7.1.2.1 The yield strength may be determined by the 0.2 % offset method or by the total extension under load of 0.5 % method.
7.1.2.2 For plates ¾ in. [20 mm] and under in thickness, the test specimen shall be the 1½ in. [40 mm] wide rectangular-test specimen.
7.1.2.3 For plates over ¾ in. [20 mm], either the full thickness rectangular-test specimen or the ½ in. [12.5 mm] round-test specimen may be used.
7.1.2.4 When the 1½ in. [40 mm] wide rectangular-test specimen is used, the elongation is measured in a 2 in. [50 mm] gage length which includes the fracture.
7.2 Impact Properties Requirements:
7.2.1 Transverse Charpy V-notch impact test specimens shall have a lateral expansion opposite the notch of not less than 0.015 in. [0.38 mm].
7.2.2 The test temperature shall be agreed upon between the manufacturer and the purchaser, but shall not be higher than 32°F (0°C).
8. Keywords
8.1 alloy steel; boilers; high-strength; impact tested; plates; pressure vessels; quenched; tempered
SUPPLEMENTARY REQUIREMENTS
Supplementary requirements shall not apply unless specified in the order.
A list of standardized supplementary requirements for use at the option of the purchaser are included in Specification A20/A20M. Several of those considered suitable for use with this specification are listed by title. Other tests may be performed by agreement between the supplier and the purchaser.
- S1. Vacuum Treatment,
- S2. Product Analysis,
- S3. Simulated Post-Weld Heat Treatment of Mechanical Test Coupons,
- S5. Charpy V-Notch Impact Test,
- S6. Drop Weight Test (for Material 0.625 in. [16 mm] and over in Thickness),
- S7. High-Temperature Tension Test,
- S8. Ultrasonic Examination in accordance with Specification A435/A435M,
- S9. Magnetic Particle Examination,
- S11. Ultrasonic Examination in accordance with Specification A577/A577M,
- S12. Ultrasonic Examination in accordance with Specification A578/A578M, and
- S17. Vacuum Carbon-Deoxidized Steel.
