GB/T 39733-2024 in English
VALIDRecycling iron-steel materials
- Issued on:2024-11-28
- Implemented on:2025-06-01
- File Format:PDF
- Delivery:Via email within 5 business days
$422.00
| Standard No: | GB/T 39733-2024 |
| Document status: | VALID |
| Title in English: | Recycling iron-steel materials |
| Title in Chinese: | 再生钢铁原料 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2024-11-28 |
| Implemented on: | 2025-06-01 |
| Superseding: |
GB/T 39733-2020 Recycling iron-steel materials
|
| ICS Classification: | 77.140.01-Iron and steel products in general |
| Chinese Classification: | H40-Steel and iron products in general |
| Professional Classification: | GB-National Standard |
| Related Keywords: | raw materials
radioactive/hazardous materials iron-steel materials introduction core changes materials scrap steel processing companies |
| Related Topics: | Iron and steel raw materials
collagen regeneration native primary amount of steel |
《GB/T 39733-2024再生钢铁原料》由TC318（全国生铁及铁合金标准化技术委员会）归口，主管部门为中国钢铁工业协会。
Introduction
Core changes in the standard revision
| Revised items | 2020 version | 2024 version | Technical impact |
|---|---|---|---|
| Definition of inclusions | Only basic definition | Explicitly exclude packaging materials | More precise inspection scope |
| New terms | None | Increase Non-steel metal substances and Physical amount of steel | Improve the quality evaluation system |
| Small material grades | 3 varieties | 4 new LRS304 | Refine the classification of thin plates |
Technical specifications for raw material classification
The standard divides recycled steel raw materials into 7 categories and 24 specific grades, among which crushed recycled steel raw materials have a new block-type processing method:
Typical processing flow: Disassembly→magnetic separation→crushing (shearing)→sorting→packagingComparison of key technical indicators
| Test items | Limit requirements | Test methods |
|---|---|---|
| Radioactive contamination | ≤background value+0.25μSv/h | SN/T0570 |
| hazardous waste | ≤0.01% | GB5085 series |
| physical quantity of steel | ≥92% | magnetic separation weighing method |
Implementation key points
- Acceptance batch processing:The minimum inspection batch is reduced from 300t to 30t, and the sampling plan needs to be adjusted
- LRS304 application:Establish a separate sorting line for thin plate waste with a thickness of <2mm
- Steel physical quantity detection: It is recommended to configure XRF+magnetic separation composite detection equipment
Standard Evolution Analysis
This revision reflects three major trends: ① Strengthening the control of radioactive/hazardous materials; ② Refining the classification of raw materials (adding 2 new terms and 1 brand); ③ Optimizing the inspection rules (the lower limit of batch weight is reduced by 90%). In particular, the introduction of the steel physical quantity indicator will promote scrap steel processing companies to improve their sorting technology level.
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