Standard technical specification for zirconium and zirconium alloy ingots for nuclear use

Code: B350/B 350M -- 02

Standard technical specification for zirconium and zirconium alloy ingots for nuclear use

The standard is issued under the fixed B350/B350M standard number. The standard number is immediately followed by the year number of the earliest adoption of the standard, which, at the time of revision, is the year number of the latest revision. The number in parentheses (ε) indicates the year number of the last reapproval.

1, scope,

1.1. This technical standard is applicable to nuclear zirconium and zirconium alloy ingots after vacuum melting.

1.2. Values expressed in inch-pound or SI as standard units are standard values. In the main text, SI is the standard unit value indicated in parentheses. The values expressed by the above two units are not completely equal; Therefore, only one can be used alone. Mixing the two units may lead to inconsistency with the requirements of technical standards.

1.3. The following precautions are test methods applicable only to parts of the technical standard: The purpose of this standard is not to address safety issues related to its use. The USER of this STANDARD has THE responsibility to formulate the corresponding implementation method of safety protection and health care, and determine the management regulations related to the application.

2. Reference the file

2.1 ASTM Standards:

E 29 Significant numbers are used in test data to determine the consistency of technical requirements.

E 114 contact direct beam ultrasonic pulse-echo detection method.

3, terminology,

3.1 Batch definition

3.1.1 Melting -- a batch of ingots produced by the same casting process;

3.1.2. Ingot -- no defined requirements;

3.1.3. Bars, plates, Pipes and powder Metallurgy products (single definition, same nuclear and non-nuclear standards) -- a batch of materials of the same size, shape and state obtained from the same ingot or powder mixture through the same processing process and heat treatment parameters. Unless otherwise agreed by the manufacturer and purchaser, a batch shall be limited to 8H continuous annealing or final batch annealing in a single furnace.

3.1.4 Spongy -- a batch of mixtures produced at the same time.

3.1.5. Welding fillers -- defined between the manufacturer and the purchaser.

4, classification,

4.1. Ingots are divided into the following five grades:

4.1.1. R60001 pure zirconium;

4.1.2. R60802 zirconia-tin alloy;

4.1.3. R60804 zirconia-tin alloy;

4.1.4. R60901 Zirconium - Niobium alloy;

4.1.5. R60904 Zirconium - Niobium alloy.

5. Order information

5.1 The material order of this standard, indicating the desired material as required, shall include the following information:

5.1.1 Weight or number of pieces;

5.1.2 Material name;

5.1.3 Grade (Table 1);

5.1.4 Dimensions (diameter, length or weight), units of this standard (inch-pound or SI);

5.1.5 ASTM Code and date of publication.

Note: Typical 1-A order is described as follows:

Two zirconium ingots; Grade: R60001; 1 b Φ 12 x in 1000; ASTM Technical requirement: B350-01.

5.2 If necessary, in addition to the information stipulated in 5.1, the following options and key points shall be agreed upon by both the manufacturer and the Purchaser, and the Purchaser shall indicate in the procurement contract:

5.2.1 Inspection (Part 12);

5.2.2 Requirements for oxygen analysis (Table 1).

6. Materials and manufacturing

6.1. Materials in compliance with this standard are produced by multiple vacuum self-consumption melting, or electron beam melting, or other traditional processes used for active metal smelting. All smelting shall be carried out in furnaces normally used for active metals.

7, surface treatment

7.1 Unless otherwise specified, the ingot will be machined or polished or a combination of both to remove the skin and surface defects harmful to subsequent processing.

7.2. After the surface treatment is completed, it is not allowed to have any stand or local depression that can affect the diameter direction of subsequent processing. The difference between the maximum diameter and minimum radius of the treated ingot shall not exceed 20% of the minimum radius. The maximum Angle between the stand, groove and local depression combined with the spindle axis shall not exceed 30. The end face of each ingot should be chamfered or turned into a circular arc, with a minimum chamfered or circular arc of 1/2in (12mm).

8. Chemical requirements

8.1. The chemical composition of the ingot shall comply with the provisions in Table 1;

8.2 Take enough samples along the side surface of each ingot, and the head sample is within 5in (125mm) from the head surface; The distance between the remaining samples or between the samples and the bottom surface shall not exceed the diameter of the ingot. At least 3 samples are taken for each ingot.

8.3. The samples were analyzed according to the alloy and impurity elements specified in Table 1.

8.4. Analysis shall be carried out according to the manufacturer's methodological standards. When there is a dispute over the chemical composition of the metal, the chemical analysis method shall be arbitrated by a mutually approved laboratory for verification purposes.

Table 1. Chemical composition requirements

 

 

Shaanxi Tipu Rare Metal Materials Co. LTD

A Oxygen is measured and results reported when specified in the purchase order; When the maximum allowable value, minimum allowable value or both are required, this shall be specified in the order.

8.5. Product Inspection Analysis -- Product inspection analysis is an analysis performed by the purchaser or producer to verify the composition of the ingot. The inspection AND ANALYSIS error REFLECTS the deviation of chemical analysis in different laboratories. Table 2 lists the allowable deviation range of product inspection and analysis.

Table 2. Allowable Errors of Product Analysis

 

 

Shaanxi Tipu Rare Metal Materials Co. LTD

9 and the reinspection do not coincide

9.1 If any sample or sample is found to be significantly contaminated, improperly treated, or not sufficiently representative of the sample, it shall be replaced with a new sample or sample.

9.2 The manufacturer shall have the right to retest the ingot if the results of any inspection are not in conformity with the provisions of this standard. The manufacturer can peel and cut the ingot to remove the nonconforming metal and sample the remaining ingot for reinspection. Ingot is acceptable if all retest results meet the requirements of this standard.

10. The number of significant digits in the numerical limit

10.1. In order to determine that the performance requirements listed in Tables 1 and 2 conform to the specified limits, the observed and calculated values shall be modified in accordance with the modification method in the recommended method E29.

11. Ultrasonic test

11.1 Unless otherwise agreed between the manufacturer and the purchaser, ingots shall be ultrasound-tested in accordance with the methods specified in 11.1.1 and 11.1.2.

11.1.1. Standardization -- The test shall be performed according to recommended experimental Procedure E114. The detection device shall be a longitudinal beam probe, operating at 2.25 MHZ, using the appropriate coupler on the part under test. The test pieces of the detection device shall be standardized. Adjust the bottom wave to 100%. The test block shall have a diameter and surface similar to that of the ingot. Standards should be established before inspection of ingots.

11.1.2. Two 0.093 inch (2.4mm) holes in the transverse interface of the ingot shall be used as a reference standard unless otherwise approved by the purchaser. One of them should be radially distributed near the center of the transverse interface of the ingot, and the other should be located at 1/2 radius. The bottom of these holes should be 0.5 inch (12mm) below the end face of the ingot (perpendicular to the axis of the ingot). For calibration, the two reference holes should be in a straight line with the bundle, and the hole at 1/2 radius is farthest from the test point. The entire length of the ingot should then be tested. Separate 90º along the surface length of the circular ingot and make two marching checks. If this operation does not adequately inspect all ingots, more line inspections should be done. Remove observed visible defects that are outside the reference standard. If the bottom reflection is between 50 and 95%, increase the gain so that the bottom reflection is 100%, and check the scan trace to observe internal reflection above the reference standard. Again, this defect was removed and the calibration probe was repeated on the test block after amplitude adjustment and inspection. Record all minor defect locations and submit them to the purchaser by ingot number.

12, inspection

12.1. The manufacturer shall inspect the materials in accordance with this specification before delivery. The purchaser or his representative may observe the test or inspection materials in person at the manufacturer's production site if the order specifically specifies this. In this case, the purchaser should indicate on the order that he wishes to inspect the goods in person. The manufacturer shall give sufficient notice of the specified time and place of inspection. If the purchaser's representative is not present at the agreed inspection time, the manufacturer shall consider the Purchaser to have waived the inspection at the manufacturer's site.

12.2. The manufacturer shall provide all appropriate inspection devices free of charge to the inspector on behalf of the Purchaser in order to satisfy him that the materials supplied meet the requirements of this Specification. The inspection work should be free from any unnecessary interference.

13, refuse to accept

13.1. If the materials are rejected because they do not meet this standard, the purchaser shall report to the manufacturer within 60 days after receiving the materials. Unless otherwise specified, rejected material will be returned to the manufacturer at the producer's expense unless the User receives additional disposition advice within three weeks of the rejection notice.

14, arbitration

14.1 In the event of any disagreement between the manufacturer and the purchaser regarding the conformity of the materials with the requirements of this specification or any special inspection specified by the purchaser, the arbitrator approved by both parties shall examine the existing problems and determine whether the materials conform to this specification based on the inspection results of the arbitrator.

15. Certificate of quality

15.1. The manufacturer shall provide the Purchaser with a quality certificate reflecting the test and inspection results of each ingot ordered.

16. Packaging and labeling

16.1. The ingot number shall be marked on the head of each ingot with metal font, and the label on each box or pad shall be clear and eye-catching, including the following contents:

16.1.1. Order or Contract No

16.1.2 Material name

16.1.3, level

16.1.4, spindle number

16.1.5 Nominal diameter

16.1.6 Gross weight, net weight and tare weight

16.1.7 ASTM Standard No

16.2. Ingots shall be boxed or fixed on wooden supports to ensure safety and transport to destination by general purpose vehicles

17. Key Words

17.1 Ingots, nuclear reactors, reactor grade, zirconium, zirconium alloys