GB/T 33212-2016 in English
VALIDSteel open die forgings on hammer--General specifications
- Issued on:2016-12-13
- Implemented on:2017-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
| Standard No: | GB/T 33212-2016 |
| Document status: | VALID |
| Title in English: | Steel open die forgings on hammer--General specifications |
| Title in Chinese: | 锤上钢质自由锻件 通用技术条件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2016-12-13 |
| Implemented on: | 2017-07-01 |
| ICS Classification: | 77.140.85-Iron and steel forgings |
| Chinese Classification: | J32-Forging and pressing |
| Professional Classification: | GB-National Standard |
| Related Keywords: | steel free forgings
open die forgings die forgings free forgings general technical conditions |
| Related Topics: | GB/T33212-2016
Quenching and tempering of forgings free fall method proton condition Technology is up to me General purpose forgings General technical conditions for forgings GBT33212 GB/T 33212-2016 Forging grade General technology for forgings hammer technology General technical conditions for rubber hammers gb/t33212 Foreign forging technology Free forging amount |
《GB/T 33212-2016锤上钢质自由锻件 通用技术条件》由TC74（全国锻压标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
Interpretation of General Technical Conditions for Steel Free Forgings on Hammer
1. Background and Purpose of Standard Formulation
GB/T33212-2016 General Technical Conditions for Steel Free Forgings on Hammer is one of China's national standards, which mainly stipulates the technical requirements, test methods and acceptance rules for forgings in the free forging process on hammer. This standard is applicable to general-purpose forgings of carbon steel and alloy structural steel forged on hammer free forging, including die forgings.
The formulation of the standard aims to unify industry technical specifications, ensure product quality, and provide clear references for quality and technical requirements for both supply and demand parties.
2. Comparison of standard frameworks
| Standard dimensions | Ordering conditions | Technical requirements | Test methods |
|---|---|---|---|
| Ordering conditions | The purchaser shall provide the original data required for the production of forgings, including quantity, materials, drawings, inspection items, etc. | - The steel ingots or billets used for forging shall meet the requirements of killed steel, indicate the furnace number and be accompanied by a certificate of conformity. - Ingots, billets and rolled products shall be re-tested and confirmed to be qualified before use. | Chemical composition analysis shall be carried out in accordance with GB/T222, GB/T20066, GB/T223; mechanical properties test shall be carried out in accordance with GB/T228.1, GB/T229, GB/T231.1 and other standards. |
| Technical requirements | - The purchaser shall specify the use conditions and performance requirements of the forgings. - If alternative materials are required, both parties shall negotiate and confirm in writing. | - Treatment of surface defects of forgings: cracks, folds, etc., which are required to be removed or repaired by welding when the depth exceeds the machining allowance. - Deformation after heat treatment shall be corrected to ensure that the mechanical properties meet the requirements. | The test levels are divided into levels Ⅰ to Ⅴ, and the specific items and quantities are shown in Table 1. Including tests such as chemical composition, hardness, tensile strength, and impact. |
3. Implementation suggestions and precautions
Case analysis: A forging company purchased carbon steel billets for the production of free forgings on hammers. According to the standard requirements, the purchaser should provide detailed ordering information and specify the inspection items.
- Material selection: Killed steel ingots are preferred to ensure that the chemical composition meets the allowable deviation range of GB/T222.
- Process control: Pay attention to eliminating surface defects during forging to ensure that the mechanical properties meet the standards after heat treatment.
- Inspection link: Samples are taken for tensile and impact tests according to the requirements of Level II tests to confirm whether they meet the design requirements.
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