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ASTM A488 PDF

Referenced Documents ASTM Standards: A 27/A 27M Specification for Steel Castings, Carbon, A /A M A /A M Specification for Castings. ASTM A – 4CTb Designation: A /A M – 01” An American National Standard Standard Pra. 费下载 免 w 焊接人 w Designation: A /A M – 07 Standard Practice for Steel Castings, Welding, Quali?cations of.

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ASTM D e1.

A number in parentheses indicates the year of last reapproval. A superscript epsilon E indicates an editorial astk since the last revision or reapproval. This standard has been approved f o r use by agencies of the Department of Defense. P-number designations in the ASME grouping of base metals for qualification may be different than the category numbers listed in Table 1.

Within the text, the SI units are shown in brackets.

The values stated in each system are not exact asmt therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this practice. It is the responsibility o the user o this standard to establish approf f priate safety and health practices and determine the applicability o regulatory limitations prior to use.

Current edition approved Mar.

Originally a48 as A 63 T. Awtm previous edition A A M Filler Metal F Group No. Backing Strip, if any: Single or Multiple Pass: Who by virtue of these tests meets the welder performance qualification.

Manufacturer or Contractor Date: In accordance with Procedure No. Range of Thickness Qualified: Filler Metal Specification No. Flux Designation or Gas Analysis: Was Backing Strip Used? Results Laboratory Test No. Title welding of A steel castings.

Indicate if reheat maintenance is during welding or until pOStWeid near treatment is pegrrned 2. Preparation of Base Material 6. Alnclicate method of metal m a l. Also indicate whether preheat is requimd dwing metal mal. Indialte amenskn ofmaximum gap.

Standard Practice for Steel Castings, Welding, Qualifications of Procedures and Personnel

Post-Weld Heat Treatment BoxMiami, FL Carbonmanganese steel tensile strength equal to or greater than 70 ksi but less than 90 ksi [ MPa]. Low-alloy steel annealed, normalized, w488 normalized and tempered Tensile strength less than 85 ksi [ MPa].

Test material shall be oriented as shown in Fig. Welding shall be done without rotating the pipe or casting so that the weld metal is deposited from the flat, vertical, and overhead position.

Qualification in the horizontal fixed position, or in the horizontal and vertical and overhead positions, shall qual for all positions Fig. Preparation of Test Plate 5. Test material shall be subjected to the same heat-treatment before and after welding as will be applied to the casting.

If the castings are not to be postweld heattreated, then the test material is not to be postweld heat-treated. Test plate material for performance qualification testing is covered in The dimensions of the welding groove are not essential variables of the welding pro cedure. The centers of the specimens adjacent to the metal surfaces shall not exceed in. Collectively, all of the specimens required to represent the full thickness of the weld at one location shall comprise a set.

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ASTM AAM 钢铸件焊接程序和人员资格的标准实施规程_百度文库

Each specimen shall be tested and meet the requirements of 7. Qpes of Tests 6. All thicknesses of pipe or cylindrical castings having an outside diameter greater than 3 in. Range of Thicknesses QualifiedA min, in. Guided Bend Test 8. The cut surfaces shall be designated the sides of the specimen. The other two surfaces shall be called the face and root surfaces, the face surface having the greater width of weld. Guided bend test specimens are of three types depending on which surface side, face, or root is on the convex outer side of the bent specimen.

Thickness, t, of Test Plate or Pipe as Welded, in. Root Bend 2 If multiple specimens are used, one complete set shall be made for each required test.

Each specimen shall be tested and meet the requirements of 8. The side of the specimen turned toward the gap of the jig shall be the face for face-bend specimens, the root for root-bend specimens, and the side with the greater number of defects, if any, for side-bend specimens.

E Weld should be in center of reduced section. Where only a single coupon is required the center of the specimen should be midway between the surfaces. DThe ends may be threaded or shaped to fit the holders of the testing machine in such a way that the a48 is applied axially.

When using the wrap-around jig Fig. When specimens wider than 1. A suggested form Fig. However, cracks occurring on the corners of the specimen during testing shall not be considered unless there is definite evidence that they result from slag inclusions or other internal defects.

A bend bar comprised of parent metal heat treated to the ductility and strength requirements of the applicable specification shall be bent to failure. The side-bend specimen shall then be capable of being bent to within 5″ asttm the angle thus determined.

Charpy Impact Test 9. When postweld heat treatment consists of a full reheat treatment of the welded part, thus eliminating the HAZ, impact testing of the HAZ shall not be required. Heat-affected zone coupons for impact specimens shall be taken transverse to the weld and etched to define the heat-affected zone. The notch shall be cut normal to the material surface in the heat-affected zone to include as much heat-affected zone as possible in the resulting fracture Fig.

Where the astk thickness permits, the axis of a88 heat-affected zone specimen may be inclined to allow the root of the notch to align parallel to the fusion line Fig. Requalification of a Procedure Changes other than those listed may be made without requalification, provided the procedure is revised to show these changes. When two base materials having different category numbers are welded together, a procedure qualification must be performed for the combination. Qualification with A No.

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In lieu ast, an A number designation, the nominal chemical composition of the weld deposit shall be indicated on the Welding Material Specification Wstm.

Designation of nominal chemical composition may also be by reference to the AWS classification where such existsthe manufacturer’s trade designation, or other established procurement documents.

Metric Equivalents Y 8 [mml t, in. If a recessed ring is used, this surface of the specimen may be machined to a depth not exceeding the depth of the recess to remove the ring, except that in such cases the thickness of the finished specimen shall be that specified above. The presence or absence aastm up to 0. The weld to be radiographed shall be axtm least 6 in. In the event the production weld requires welder or operator qualification, the entire production weld made by that welder or operator shall be radiographed and atsm by a qualified welder or operator.

Alternatively, the entire weld shall be removed and replaced by a qualified welder or operator. A suggested form for recording such information is shown in Fig. Separate welding procedures qstm required for each category. Performance Qualification of Welders or Operators The welder or operator successfully performing the procedure qualification test is automatically qualified for performance.

The welder or operator successfully qualified with one procedure for a process is qualified to weld with any other welding procedure using the same welding process, unless requalification is required by Section Groove dimensions as shown in Fig. The welding procedure shall conform to that given in the procedure qualification. Requalification of Welders and Operators Qualification under any F number up to and including F4 shall qual a welder for all lower F numbers.

A48 he fails these tests, he must undergo further training before a retest is permitted.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility This standard is subject to revision at any time by the responsible technical sstm and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

Your comments will receive astk consideration asmt a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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