GB/T 715-1989 PDF EnglishUS$165.00 · In stock · Download in 9 seconds
GB/T 715-1989: Hot-rolled round carbon steel bars for standard parts Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete GB/T 715: Historical versions
GB/T 715-1989: Hot-rolled round carbon steel bars for standard parts---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT715-1989GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA GB 715-89 Hot-rolled round carbon steel bars for standard parts Issued on. FEBRUARY 02, 1989 Implemented on. JANUARY 01, 1990 Issued by. Ministry of Metallurgical Industry of the People’s Republic of China Table of Contents1 Subject Content and Application Scope... 3 2 Normative references... 3 3 Dimension, Appearance, Weight and Allowable Tolerance... 3 4 Technical Requirements... 5 5 Test Method... 7 6 Inspection Rules... 7 7 Package, Mark and Quality Certificate... 7 Additional Information... 8 Hot-rolled round carbon steel bars for standard parts1 Subject Content and Application ScopeThis Standard stipulates the dimension, appearance, weight and allowable tolerance, technical requirements, test method, inspection rules, package, marks and quality certificates etc. of hot-rolled round carbon steel bars for screw, nut, bolt, and rivet. This Standard is applicable to manufacturing the hot-rolled round carbon steel bars of cold upsetting or hot upsetting’s screws, nuts, bolts and rivets.2 Normative referencesGB 222 Method of sampling steel for determination of chemical composition and permissible tolerances for product analysis GB 223 Methods for chemical analysis of iron, steel and alloy GB 228 Metallic materials - Test pieces for tensile testing GB 233 Metallic materials - Forging test GB 237 Method for flattening test metals GB 2101 General requirement of acceptance packaging marking and certification for section steel3 Dimension, Appearance, Weight and Allowable Tolerance3.1 Dimension, weight and allowable tolerance 3.2 Length 3.2.1 Generally, the length of the steel bar is 4-9 m. 3.2.2 The specified length of the steel bar shall be within the general length scale and specified in the Contract; the allowable length tolerance is 600 mm. 3.2.3 According to requirements of the demander, the round steel bar with diameter of less than 18 mm can be delivered in coil through agreement by both Parties. The minimum coil weight is not less than 100 kg. 3.3 Appearance 3.4 Weight The steel bar is delivered according to actual weight. Through agreement of both Parties, the delivery according to the theoretical weight shall be specified in the Contract. 3.5 Marking example The hot-rolled round carbon steel bar for Φ25 mm standard parts rolled by BL2 steel is marked as.4 Technical Requirements4.1 Designation and chemical compositions 4.2 Smelting method Steel is smelted by oxygen converter or open-hearth furnace. 4.3 Delivery state After hot-rolling the round steel bar, water must not be sprayed; do not perform the residual-heat quenching treatment; deliver in the state of hot-rolling. 4.4 Physical performance and process performance 4.4.2 The hot-rolled round carbon steel bars for standard parts shall perform the cold upsetting test; if the Demander proposes, the hot upsetting test can also be conducted; its requirement shall comply with provisions of Table 4. 4.4.3 According to the requirement of the Demander, it shall be specified in the Contract that the hot-rolled round carbon steel bars for manufacturing rivet shall further perform the rivet upsetting plane test under the cold state or the hot state according to provisions of Table 4.5 Test MethodThe sampling method and the test method of every test of the round steel bar shall comply with the provisions of Table 5.6 Inspection Rules6.1 Inspection and acceptance Inspection and acceptance of the round steel bar are carried out by the technical supervision department of the Supplier.7 Package, Mark and Quality Certificate7.1 The package requirement of the round steel shall comply with the provisions of the category 2 of GB 2101. 7.2 The mark and the quality certificate of the round steel shall comply with the provisions of GB 2101. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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