Quality standards for angle steel and matters needing attention when purchasing and accepting them:
Angle steel is a common steel material widely used in construction, bridges, machinery and other fields. The quality of angle steel directly affects its performance and safety in use. Therefore, when purchasing and accepting angle steel, certain quality standards need to be followed.
Quality standards for angle steel:
1. Chemical composition
The chemical composition of angle steel should comply with the national standard GB/T 700-2006. Among them, the carbon content should be between 0.12%-0.20%, the silicon content should be between 0.10%-0.35%, the manganese content should be between 0.30%-0.65%, the phosphorus content should not exceed 0.05%, and the sulfur content should not exceed 0.045 %.
2. Mechanical properties
The mechanical properties of angle steel should comply with the national standard GB/T 700-2006. Among them, the tensile strength should be between 370-500MPa, the yield point should be above 235MPa, and the elongation after break should be between 26% and 30%.
3. Appearance quality
The appearance quality of angle steel should comply with the national standard GB/T 700-2006 (or American standard or European standard). The surface of the angle steel should be smooth and flat, without defects such as cracks, folds, delamination, and bubbles. The size and shape of the angle steel shall comply with the drawing requirements, and the deviation shall not exceed the standard requirements.
4. Marks and logos
The signs and identification of angle steel should be clear and complete, including manufacturer, model, specification, production date and other information. This information should be easily identifiable and traceable.
Notes on procurement acceptance:
1. Choose formal channels
When purchasing angle steel, you should choose a regular manufacturer or dealer. The quality of products through formal channels is guaranteed, and the after-sales service is more reliable.
2. Check product quality certification documents
When purchasing angle steel, the manufacturer or dealer should be required to provide product quality certification documents, such as quality certificates, quality inspection reports, etc. These certification documents can prove that the quality of the product meets national standards or industry standards.
3. Check product appearance quality
When accepting angle steel, you should check whether the appearance quality of the product meets the requirements. For example, whether the surface is smooth and flat, and whether there are defects such as cracks, folds, delamination, and bubbles. Whether the size and shape comply with the drawing requirements.
4. Check product marks and logos
When accepting angle steel, you should check whether the product's signs and markings are clear and complete. Marks and logos should include manufacturer, model, specifications, production date and other information to facilitate identification and traceability.
5. Carry out necessary inspections and tests
When accepting angle steel, necessary inspections and tests can be carried out, such as tensile tests, impact tests, etc., to verify whether the performance of the product meets the requirements. If substandard products are found, they should be returned or exchanged promptly.
6. Pay attention to contract terms
When purchasing angle steel, you should pay attention to the contract terms and clarify the product quality requirements, delivery time, payment method, etc. If a dispute occurs, it should be resolved through consultation in a timely manner.
In general, selecting high-quality angle steel and conducting effective acceptance is not only related to the smooth progress of the project, but also an important guarantee for production safety. Hopefully this information will help you make informed decisions during the angle steel purchasing and acceptance process.
Angle steel is a common steel material widely used in construction, bridges, machinery and other fields. The quality of angle steel directly affects its performance and safety in use. Therefore, when purchasing and accepting angle steel, certain quality standards need to be followed.
Quality standards for angle steel:
1. Chemical composition
The chemical composition of angle steel should comply with the national standard GB/T 700-2006. Among them, the carbon content should be between 0.12%-0.20%, the silicon content should be between 0.10%-0.35%, the manganese content should be between 0.30%-0.65%, the phosphorus content should not exceed 0.05%, and the sulfur content should not exceed 0.045 %.
2. Mechanical properties
The mechanical properties of angle steel should comply with the national standard GB/T 700-2006. Among them, the tensile strength should be between 370-500MPa, the yield point should be above 235MPa, and the elongation after break should be between 26% and 30%.
3. Appearance quality
The appearance quality of angle steel should comply with the national standard GB/T 700-2006 (or American standard or European standard). The surface of the angle steel should be smooth and flat, without defects such as cracks, folds, delamination, and bubbles. The size and shape of the angle steel shall comply with the drawing requirements, and the deviation shall not exceed the standard requirements.
4. Marks and logos
The signs and identification of angle steel should be clear and complete, including manufacturer, model, specification, production date and other information. This information should be easily identifiable and traceable.
Notes on procurement acceptance:
1. Choose formal channels
When purchasing angle steel, you should choose a regular manufacturer or dealer. The quality of products through formal channels is guaranteed, and the after-sales service is more reliable.
2. Check product quality certification documents
When purchasing angle steel, the manufacturer or dealer should be required to provide product quality certification documents, such as quality certificates, quality inspection reports, etc. These certification documents can prove that the quality of the product meets national standards or industry standards.
3. Check product appearance quality
When accepting angle steel, you should check whether the appearance quality of the product meets the requirements. For example, whether the surface is smooth and flat, and whether there are defects such as cracks, folds, delamination, and bubbles. Whether the size and shape comply with the drawing requirements.
4. Check product marks and logos
When accepting angle steel, you should check whether the product's signs and markings are clear and complete. Marks and logos should include manufacturer, model, specifications, production date and other information to facilitate identification and traceability.
5. Carry out necessary inspections and tests
When accepting angle steel, necessary inspections and tests can be carried out, such as tensile tests, impact tests, etc., to verify whether the performance of the product meets the requirements. If substandard products are found, they should be returned or exchanged promptly.
6. Pay attention to contract terms
When purchasing angle steel, you should pay attention to the contract terms and clarify the product quality requirements, delivery time, payment method, etc. If a dispute occurs, it should be resolved through consultation in a timely manner.
In general, selecting high-quality angle steel and conducting effective acceptance is not only related to the smooth progress of the project, but also an important guarantee for production safety. Hopefully this information will help you make informed decisions during the angle steel purchasing and acceptance process.
