ASME-SA29- 2010 pdf download

ASME-SA29- 2010 pdf download.SPECIFICATION FOR STEEL BARS, CARBON AND ALLOY, HOT-WROUGHT, GENERAL REQUIREMENTS FOR.
3.1.1.1 Rounds — 7 ⁄ 32 to 10.0 in. [5.5 to 250 mm], inclusive, 3.1.1.2 Squares — 7 ⁄ 32 to 6.0 in. [6 to 160 mm], inclusive, 3.1.1.3 Round-Cornered Squares — 7 ⁄ 32 to 8.0 in. [6 to 200 mm], inclusive, 3.1.1.4 Flats — 1 ⁄ 4 to 8 in. inclusive, in width: 13 ⁄ 64 in. in minimum thickness up to 6 in. in width; and 0.230 in. in minimum thickness for over 6 to 8 in. in width, inclusive [over 5 mm in thickness up to 150 mm in width; and over 6 mm in thickness for over 150 mm through 200 mm in width]. Maximum thickness for all widths is 4 in. [100 mm]. 3.1.1.5 Hexagons and Octagons — 1 ⁄ 4 to 4 1 ⁄ 16 in. [6 to 103 mm], inclusive, between parallel surfaces, 3.1.1.6 Bar Size Shapes — Angles, channels, tees, zees, when theirgreatestcross-sectional dimension is under 3 in. [75 mm], and 3.1.1.7 Special BarSections — Half-rounds, ovals, half-ovals, other special bar size sections. 3.1.2 Cold-Finished Steel Bars — Steel bars pro- duced by cold finishing previously hot-wrought bars by means of cold drawing, cold forming, turning, grinding, or polishing (singly or in combination) to yield straight lengths or coils in sections that are uniform throughout their length and in the following sections and sizes: 3.1.2.1 Rounds — 9 in. [230 mm] and under in diameter, 3.1.2.2 Squares — 6 in. [150 mm] and under between parallel surfaces, 3.1.2.3 Hexagons — 4 in. [100 mm] and under between parallel surfaces, 3.1.2.4 Flats — 1 ⁄ 8 in. [3 mm] and over in thickness and not over 12 in. [300 mm] in width, and 3.1.2.5 Special Bar Sections: 3.1.3 Lot— Unless otherwise specifiedin the contract or order, a lot shall consist ofall bars submitted for inspec- tion at the same time of the same heat, condition, finish, size, or shape. For bars specified in the quenched and tempered condition, when heat treated in batch-type fur- naces, a lot shall consist of all bars from the same heat, of the same prior condition, the same size, and subjected to the same heat treatment in one tempering charge.
4. Chemical Composition 4.1 Limits: 4.1.1 The chemical composition shall conform to the requirements specified in the purchase order or the individual product specifications. For convenience the grades commonly specified for carbon steel bars are shown in Tables 1 and 2. Bars may be ordered to these grade designations and when so ordered shall conform to the specified limits by heat analysis. 4.1.2 When compositions other than those shown in Tables 1 and 2 are required, the composition limits shall be prepared using the ranges and limits shown in Table 3 for carbon steel and Table 4 for alloy steel. 4.2 Heat or Cast Analysis: 4.2.1 The chemical composition of each heat or cast shall be determined by the manufacturer in accordance with Test Methods, Practices, and Terminology A 751. 4.2.2 The heat or cast analysis shall conform to the requirements specified in the product specification or pur- chase order. These can be the heat chemical range and limit for a grade designated in Tables 1 and 2, or another range and limit in accordance with 4.1.2, or with require- ments of the product specification. NOTE 2 — Heat analysis for lead is not determinable since lead is added to the ladle stream while each ingot is poured. When specified as an added element to a standard steel, the percentage of lead is reported as 0.15 to 0.35 incl, which is the range commonly specified for this element. 4.2.3 If requested or required, the heat analysis shall be reported to the purchaser or his representative. 4.2.4 Reporting of significant figures and rounding shall be in accordance with Test Methods, Practices, and Terminology A 751. 4.3 Product Analysis: 4.3.1 Merchant quality carbon bar steel is not subject to rejection for product analysis unless misapplication of a heat is clearly indicated.
4.3.3 Samples for product analysis shall be taken by one of the following methods: 4.3.3.1 Applicable to small sections whose cross- sectional area does not exceed 0.75 in. 2 [500 mm 2 ] such as rounds, squares, hexagons, and the like. Chips are taken by milling or machining the full cross section of the piece. Drilling is notafeasible methodforsampling sizes 0.75 in. 2 and smaller. 4.3.3.2 Applicable to products where the width of the cross section greatly exceeds the thickness, such as bar size shapes and light flat bars. Chips are taken by drilling entirely through the steel at a point midway between the edge andthe middle ofthe section, orby milling ormachin- ing the entire cross section. 4.3.3.3 Applicable to large rounds, squares semi- finished, etc. Chips are taken at any point midway between the outside and the center of the piece by drilling parallel to the axis orby milling or machining the full cross section. In cases where these methods are not practicable, the piece may be drilled on the side, but chips are not taken until they represent the portion midway between the outside and the center. 4.3.3.4 When the steel is subject to tension test requirements, the tension test specimen can also be used for product analysis. In that case, chips forproduct analysis can be taken by drilling entirely through the tension test specimens or by the method described in 4.3.3.1.