GB/T 33083-2016 PDF EnglishUS$150.00 · In stock · Download in 9 seconds
GB/T 33083-2016: Heavy carbon structural steel forgings - Technical specification Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 33083-2016: Heavy carbon structural steel forgings - Technical specification---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/GBT33083-2016NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.140.85 J 32 Heavy carbon structural steel forgings - Technical specification ISSUED ON: OCTOBER 13, 2016 IMPLEMENTED ON: MAY 01, 2017 Issued by: General Administration of Quality Supervision, Inspection and Quarantine of the PRC; Standardization Administration of the PRC. Table of ContentsForeword ... 4 1 Scope ... 5 2 Normative references ... 5 3 Ordering requirements ... 5 4 Manufacturing process ... 6 4.1 Smelting ... 6 4.2 Forging ... 6 4.3 Heat treatment ... 6 4.4 Repair welding ... 6 5 Technical requirements ... 6 5.1 Chemical composition ... 6 5.2 Mechanical properties ... 8 5.3 Hardness ... 9 5.4 Nondestructive testing ... 9 6 Inspection rules and test methods ... 10 6.1 Chemical composition analysis ... 10 6.2 Tests of mechanical properties ... 10 6.3 Hardness inspection ... 14 6.4 Retest ... 14 6.5 Re-heat treatment ... 14 7 Acceptance and quality certificate ... 14 8 Marking and packaging ... 15 Figure 1 -- Sampling positions for solid shaft, square, and rectangular forgings ... 12 Figure 2 -- Sampling positions for hollow-cylinder forgings ... 13 Figure 3 -- Sampling positions for disc forgings ... 13 Figure 4 -- Sampling positions for ring forgings ... 13 Table 1 -- Chemical composition % (mass fraction) ... 7 Table 2 -- Allowable deviation for chemical composition of finished product ... 7 Table 3 -- Mechanical properties ... 8 Table 4 -- Level and inspection items ... 11 Heavy carbon structural steel forgings - Technical specification1 ScopeThis Standard specifies the ordering requirements, manufacturing process, technical requirements, inspection rules and test methods, acceptance and quality certificate, marking and packaging, etc. of carbon structural steel forgings for general use in mechanical products. This Standard applies to the ordering, manufacture, and inspection of heavy carbon structural steel forgings for general use.2 Normative referencesThe following documents are indispensable for the application of this document. For the dated references, only the editions with the dates indicated are applicable to this document. For the undated references, the latest edition (including all the amendments) are applicable to this document. GB/T 223 (all parts) Methods for chemical analysis of iron, steel and alloy GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature (GB/T 228.1-2010, ISO 6892-1:2009, MOD) GB/T 229 Metallic Materials - Charpy Pendulum Impact Test Method (GB/T 229-2007, ISO 148-1:2006, MOD) GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method (GB/T 231.1-2009, ISO 6506-1:2005, MOD)3 Ordering requirements3.1 The purchaser shall specify the forging name, material designation, number of standard adopted, level, corresponding technical requirements and inspection items, delivery state, quantity supplied, and other additional descriptions in the ordering contract. 3.2 The purchaser shall provide the ordering drawings or related finishing drawings. 3.3 When the purchaser has additional requirements, it shall be agreed upon by the supplier and the purchaser.4 Manufacturing process4.1 Smelting The steel for forgings shall be smelted by electric furnace or other smelting methods agreed by the user which guarantee the quality. 4.2 Forging 4.2.1 Forgings shall be forged with steel ingots or billets. When the forgings are directly forged by steel ingots, at both ends of the ingot nozzle and riser, there shall be sufficient removal, to ensure that the forgings have no shrinkage cavity and severe segregation. 4.2.2 Forgings shall be forged on forging equipment with sufficient capacity, to ensure forging penetration and uniformity of macrostructure. Forgings allow for multiple-length forging. 4.3 Heat treatment Forgings shall be slowly cooled by high-temperature tempering, normalizing plus tempering, or other methods, to improve macrostructure and machinability. According to the material designation and strength grade of the forging, normalizing, normalizing plus tempering, or quenching-tempering heat treatment process may be used. Forgings allow for multiple-length heat treatment. 4.4 Repair welding For defective forgings, after the welding evaluation results meet the mechanical properties of the same material designation and are approved by the purchaser, they may be repaired by repair-welding.5 Technical requirements5.1 Chemical composition 5.1.1 The supplier shall conduct heat analysis for each furnace (per pack) of molten steel. The analysis results shall comply with Table 1. For multi-furnace pouring, REPORT the weighted average analysis result. 5.1.2 When the purchaser has special requirements, the supplier shall carry out6 Inspection rules and test methods6.1 Chemical composition analysis 6.1.1 Analysis method Chemical composition analysis shall be carried out according to the method specified in GB/T 223 or other methods approved by the purchaser which can guarantee the analysis quality. 6.1.2 Heat analysis 6.1.2.1 Each furnace (pack) of molten steel shall, when pouring, be sampled to determine the chemical composition of the molten steel. 6.1.2.2 When heat analysis is not possible, the finished product analysis is allowed to replace the heat analysis. The analysis results shall meet the requirements of finished product analysis. 6.1.3 Finished product analysis The sample for finished product analysis may be taken from the forging body or its extension part; or it may be taken from a mechanical property sample. 6.2 Tests of mechanical properties 6.2.1 Inspection items and sampling quantities 6.2.1.1 According to the different uses and requirements of the forgings, refer to Table 4, to select the level and inspection items. 6.3 Hardness inspection According to the method specified in GB/T 231.1, perform Brinell hardness inspection for forgings. For forgings accepted according to hardness, Brinell hardness shall meet the requirements of Table 3. For forgings not accepted according to hardness, the hardness value shall also be recorded in the quality certificate and reported to the user. When hardness is required, for the forging to be inspected, on a representative section, inspect three points. 6.4 Retest 6.4.1 If one of the results in the tests of mechanical properties is unqualified, a retest is allowed. The retest samples shall be taken from the adjacent parts of the original sample. Double quantities of samples shall be taken for retest. All the retest results shall meet the specified requirements. 6.4.2 If the mechanical properties test is unqualified due to white spots and cracks in the sample, it shall not be retested. 6.5 Re-heat treatment When the inspection result of any mechanical property of the forgings is still unqualified, re-heat treatment may be carried out; re-sampling shall be carried out for test. The number of re-heat treatments shall not exceed two at most. The number of tempering is not limited.7 Acceptance and quality certificate7.1 The purchaser has the right to select certain test items of the forgings for acceptance. In acceptance inspection or subsequent processing or inspection, if it is found that the forgings do not meet this Standard and the supplementary technical requirements specified in the ordering contract, the purchaser shall promptly notify the supplier; the two parties shall negotiate to resolve. 7.2 The supplier shall provide the quality certificate to the purchaser. The quality certificate shall include at least the following contents: a) Contract number; b) Forging drawing number; c) Number of standard adopted and material designation; d) Smelting method, smelting furnace number, and forging identification number; ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 33083-2016 be delivered?Answer: The full copy PDF of English version of GB/T 33083-2016 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 33083-2016_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 33083-2016_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 33083-2016 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.How to buy and download a true PDF of English version of GB/T 33083-2016?A step-by-step guide to download PDF of GB/T 33083-2016_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 33083-2016". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
