This preview shows page 1. Sign up to view the full content.
Unformatted text preview: SPECIFICATION FOR STEEL SHEET, CARBON, DRAWING QUALITY, SPECIAL KILLED, COLD-ROLLED
(Identical with ASTM Speciﬁcation A 620/A 620M-96 except for editorial changes in 6.1.1.) 1. Scope 1.1 This speciﬁcation covers cold-rolled carbon steel sheet of drawing quality, special killed, in coils or cut lengths. This material is intended for fabricating identiﬁed parts where particularly severe drawing or forming may be involved or essential freedom from aging is required. 1.2 This speciﬁcation is applicable for orders in either inch-pound units (as A 620) or SI units (as A 620M). to have good uniform drawing properties for use in fabricating an identiﬁed part having extremely severe deformations and to be essentially free from aging. 4. Classiﬁcation 4.1 Cold-rolled sheet is supplied for either exposed or unexposed applications. Within the latter category, cold-rolled sheet is speciﬁed either “temper rolled” or “annealed last.” For details on processing, attributes and limitations, and inspection standards, refer to Speciﬁcation A 568 or A 568M. 2. Referenced Documents 5. General Requirements 2.1 ASTM Standards: A 568/A 568M Speciﬁcation for Steel, Sheet, Carbon, and High-Strength, Low-Alloy, Hot-Rolled and ColdRolled, General Requirements for A 619/A 619M Speciﬁcation for Steel, Sheet, Carbon, Cold-Rolled, Drawing Quality 5.1 Material furnished under this speciﬁcation shall conform to the applicable requirements of the current edition of Speciﬁcations A 568 or A 568M unless otherwise provided herein. 3. Terminology 3.1 Deﬁnitions: 6. Ordering Information 6.1 Orders for material under this speciﬁcation shall include the following information, as necessary, to describe adequately the required material: 6.1.1 Speciﬁcation number and date of issue. 6.1.2 Name of material (cold-rolled sheet, drawing quality, special killed). 6.1.3 Class (either exposed, unexposed temper rolled, or annealed last) (see 4.1).
1100 3.1.1 aging—loss of ductility with an increase in hardness, yield point, and tensile strength that occur when steel, which has been slightly cold worked (such as by temper rolling), is stored for some time. Aging also increases the tendency toward stretcher strains and ﬂuting. 3.1.2 drawing quality special killed—sheet manufactured from specially produced or selected killed steels (normally aluminum killed) specially processed COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services PART A — FERROUS MATERIAL SPECIFICATIONS SA-620/SA-620M 6.1.4 Finish (matte (dull) ﬁnish will be supplied on exposed, unless otherwise speciﬁed, and on unexposed) (see 10.1). 6.1.5 Oiling (material will be oiled unless ordered not oiled) (see 10.2). 6.1.6 Dimensions (decimal thickness, width, and length where applicable). 184.108.40.206 As agreed upon between the purchaser and the producer, material ordered to this speciﬁcation will be supplied to meet the appropriate standard or restricted thickness tolerance table shown in Speciﬁcation A 568/A 568M.
NOTE 1 — Not all producers are capable of meeting all of the limitations of the thickness tolerance tables in Speciﬁcation A 568/ A 568M. The purchaser should contact the producer regarding possible limitations prior to placing an order. 220.127.116.11 Each of the elements listed in Table 2 shall be included in the report of the heat analysis. When the amount of copper, nickel, chromium, or molybdenum is less than 0.02%, the analysis may be reported as <0.02%. When the amount of vanadium or columbium is less than 0.008%, the analysis may be reported as <0.008%. 9. Mechanical Properties 9.1 The sheet shall be suitable for the production of identiﬁed deep drawn parts. The manufacturer shall assume responsibility for selection of steel, control of processing, and ability of the material to form identiﬁed parts within properly established breakage limits. (Refer to Appendix X3 of Speciﬁcations A 568 or A 568M.) 9.2 Drawing quality, special killed steel is required when drawing quality (in accordance with Speciﬁcation A619/A 619M) will not provide a sufﬁcient degree of ductility for the fabrication of parts having stringent drawing requirements. 9.3 Refer to X4 of Speciﬁcations A 568 or A 568M for additional information. 9.4 For the purposes of pressure vessel design, the following minimum tensile properties may be assumed, 20 ksi yield strength and 40 ksi tensile strength. 6.1.7 Coil size and weight (include inside diameter, outside diameter, and maximum weight), 6.1.8 Quantity, 6.1.9 Application (show part identiﬁcation and description), 6.1.10 Cast or heat (formerly ladle) analysis (if required) (see 12.1), and 6.1.11 Special requirements (if required).
NOTE 2 — A typical ordering description is as follows: “ASTM , exposed; cold-rolled, drawing quality, A 620 dated special-killed sheet; oiled; 0.035 by 53 in. by coil; ID 24 in.; OD 48 in., max; weight 15 000 lb, max; 100 000 lb; for instrument panel” or “ASTM A 620M dated , cold-rolled, drawing quality, special-killed sheet, exposed, oiled; 0.8 by 1340 mm by coil; ID 600 mm; OD 1500 mm, max; weight 10 000 kg, max; 45 000 kg; for instrument panel.” 10. Finish and Appearance 10.1 Surface Finish: 10.1.1 Unless otherwise speciﬁed, exposed sheet shall have a matte (dull) ﬁnish. When required, a controlled surface texture and condition may be speciﬁed. 10.1.2 Unexposed sheet shall have a matte (dull) ﬁnish. Surface texture or condition may not be speciﬁed. 10.2 Oiling: 10.2.1 Unless otherwise speciﬁed, the sheet shall be oiled. 10.2.2 When required, the sheet may be speciﬁed to be furnished not oiled (dry). 10.3 Edges—The sheet shall have cut edges. 7. Manufacture 7.1 Melting Practice—The sheet shall be produced from special killed steel. It is normally produced from aluminum killed steel but may be otherwise deoxidized provided the material is capable of meeting the speciﬁed requirements. 8. Chemical Composition 8.1 The cast or heat analysis of the steel shall conform to the requirements prescribed in Table 1. 8.1.1 Unspeciﬁed elements may be present. Limits on elements shall be as stated in Table 2.
1101 11. Certiﬁcation and Reports 11.1 While not normally required for this speciﬁcation, upon request of the purchaser in the contract or COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services SA-620/SA-620M 2001 SECTION II order, a manufacturer’s certiﬁcation that the material was produced in accordance with this speciﬁcation shall be furnished. The cast or heat analysis may be reported, if required. 12. Product Marking 12.1 In addition to the requirements of Speciﬁcations A 568 or A 568M, each lift or coil shall be marked with the designation, “DQSK.” 13. Keywords 13.1 carbon steel sheet; cold rolled steel sheet; steel sheet 1102 COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services PART A — FERROUS MATERIAL SPECIFICATIONS SA-620/SA-620M TABLE 1 CHEMICAL REQUIREMENTSA
Element Carbon Manganese Phosphorus Sulfur Composition, max, % 0.10 0.50 0.020 0.030 A If aluminum is used as the deoxidizing agent, the aluminum content total by product analysis is usually in excess of 0.010%. TABLE 2 LIMITS ON UNSPECIFIED ELEMENTS (SEE 8.1.1)
Copper, max %A Nickel, max %A Chromium, max %A Molybdenum, max %A Vanadium, max % Columbium, max % Heat analysis Product analysis Heat analysis Product analysis Heat analysis Product analysis Heat analysis Product analysis Heat analysis Product analysis Heat analysis Product analysis 0.20 0.23 0.20 0.23 0.15 0.19 0.06 0.07 0.008 0.018 0.008 0.018 A The sum of copper, nickel, chromium, and molybdenum shall not exceed 0.50% on heat analysis. When one or more of these elements are speciﬁed, the sum does not apply; in which case, only the individual limits on the remaining unspeciﬁed elements will apply. 1103 COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services ...
View Full Document
- Spring '08