Stainless steel angle steel, as a common type of steel profile, enjoys a broad market presence. Due to the variety of specifications and the inconsistent implementation of quality standards by different manufacturers, there is a certain level of disparity, which has caused many users to be troubled when choosing stainless steel angle steel materials. This article briefly summarizes common methods for assessing quality and points to note when purchasing stainless steel angle steel, which can be used for reference.
Stainless steel angle steel is commonly used in the construction of metal components, connectors, and basic frame structures. It has good weldability and mechanical stress strength, as well as good plastic deformation performance. There are many methods for judging the quality of stainless steel angle steel, and the commonly used ones are as follows:
The industry standards for the appearance quality of stainless steel angle steel have clear regulations, covering aspects such as layering, scabs, cracks, etc., and also focuses on geometric shape deviations with a series of regulations, such as bending degree, edge width, edge thickness, top angle, and theoretical mass. By carefully observing with the naked eye, supplemented by several conventional inspection tools, and comparing with the implementation standards, users can easily determine whether the stainless steel angle steel product in hand is a standard qualified product. Qualified manufacturers have a relatively strict quality inspection process when leaving the factory, and the products can pass the quality inspection.
Observing the appearance is an effective preliminary inspection method. For example, by observing 2B surface 201 and 304 stainless steel angle steel materials, it can be found that the color of 201 is slightly dull, while the surface of 304 material appears bright. We can press our palms against the surface of the material, and after removing them, we can find that the deeper handprint is 201, and the shallower handprint is 304 material. However, this method requires experience and is suitable for veterans in the industry. Simple material judgment can prevent suppliers from passing off inferior products as good to a certain extent, reducing losses.
Purchasing parties with the necessary conditions can analyze the composition of stainless steel angle steel with special chemical reagents, which is also one of the most scientific detection methods. In terms of chemical composition, stainless steel angle steel tends to be similar to the general structural rolling steel series, with main inspection indicators including C, Mn, P, and S. At the same time, according to the characteristics of different grades, there are certain differences in chemical content, such as: C<0.22%, Mn: 0.30-0.65%, P<0.060%, S<0.060%. For these chemical components, we can check against standards such as ASTM to ensure the quality of stainless steel angle steel.
In actual operations, purchasing parties may not have the opportunity to conduct a comprehensive chemical analysis of the stainless steel angle steel they are about to purchase. A more common approach is to buy regular stainless steel material detection fluid and quickly and intuitively conduct a chemical reaction test on the stainless steel angle steel. For example, when a certain reagent is dropped on the surface of the stainless steel angle steel, 201 turns dark brown and 304 turns red, which can preliminarily determine the material properties. Of course, the specific chemical reactions still need to be seen according to the instructions of the reagent and cannot be generalized.
As a purchaser of stainless steel angle steel, it is necessary to be fully familiar with and understand the type classification and purchase price of stainless steel angle steel. Keep a close eye on the market trends of various steel types. When the price of stainless steel angle steel provided by the supplier is significantly lower than the market average, it is unreasonable and suspicious. It may be due to poor quality, non-standard material, or low-grade products produced by non-standard manufacturers. If there is a large price difference for the same type of steel, it is necessary to carefully consider whether there are quality issues.
When purchasing stainless steel angle steel, especially in large quantities, it is necessary to understand the reputation and integrity of the suppliers in the purchase area. Excellent suppliers pay great attention to details and services before and after sales, and care more about the reputation in the industry. Purchasing personnel must compare multiple sources and make careful judgments.
In the transaction of stainless steel angle steel, regardless of the amount of purchase, a rigorous purchase contract should be signed, specifying the type of steel, quantity, material, time, delivery period, breach of contract liability, etc., and agreeing on the rights and obligations of both parties, establishing strict legal responsibility constraints for both parties in the transaction. In this way, when there are quality issues, non-standard materials, or other disputes, they can be pursued through negotiation or legal means, minimizing risks and losses.
In summary, we hope to purchase qualified stainless steel angle steel products. First, we can preliminarily judge whether the product meets quality requirements by comparing the industry standards from the appearance of the product. Secondly, if possible, use strict chemical parameter testing to determine the standard of the material; if not possible, use regular chemical reagents to make a simple judgment of the material on-site. In addition, understand the qualifications and reputation of the supplier from the side. Be very careful and cautious when the price deviation is large. Constrain the rights and obligations of both parties by signing a detailed purchase contract.
Stainless steel angle steel is commonly used in the construction of metal components, connectors, and basic frame structures. It has good weldability and mechanical stress strength, as well as good plastic deformation performance. There are many methods for judging the quality of stainless steel angle steel, and the commonly used ones are as follows:
1. Visual Inspection
The industry standards for the appearance quality of stainless steel angle steel have clear regulations, covering aspects such as layering, scabs, cracks, etc., and also focuses on geometric shape deviations with a series of regulations, such as bending degree, edge width, edge thickness, top angle, and theoretical mass. By carefully observing with the naked eye, supplemented by several conventional inspection tools, and comparing with the implementation standards, users can easily determine whether the stainless steel angle steel product in hand is a standard qualified product. Qualified manufacturers have a relatively strict quality inspection process when leaving the factory, and the products can pass the quality inspection.Observing the appearance is an effective preliminary inspection method. For example, by observing 2B surface 201 and 304 stainless steel angle steel materials, it can be found that the color of 201 is slightly dull, while the surface of 304 material appears bright. We can press our palms against the surface of the material, and after removing them, we can find that the deeper handprint is 201, and the shallower handprint is 304 material. However, this method requires experience and is suitable for veterans in the industry. Simple material judgment can prevent suppliers from passing off inferior products as good to a certain extent, reducing losses.
2. Chemical Testing
Purchasing parties with the necessary conditions can analyze the composition of stainless steel angle steel with special chemical reagents, which is also one of the most scientific detection methods. In terms of chemical composition, stainless steel angle steel tends to be similar to the general structural rolling steel series, with main inspection indicators including C, Mn, P, and S. At the same time, according to the characteristics of different grades, there are certain differences in chemical content, such as: C<0.22%, Mn: 0.30-0.65%, P<0.060%, S<0.060%. For these chemical components, we can check against standards such as ASTM to ensure the quality of stainless steel angle steel.In actual operations, purchasing parties may not have the opportunity to conduct a comprehensive chemical analysis of the stainless steel angle steel they are about to purchase. A more common approach is to buy regular stainless steel material detection fluid and quickly and intuitively conduct a chemical reaction test on the stainless steel angle steel. For example, when a certain reagent is dropped on the surface of the stainless steel angle steel, 201 turns dark brown and 304 turns red, which can preliminarily determine the material properties. Of course, the specific chemical reactions still need to be seen according to the instructions of the reagent and cannot be generalized.
3. Price
As a purchaser of stainless steel angle steel, it is necessary to be fully familiar with and understand the type classification and purchase price of stainless steel angle steel. Keep a close eye on the market trends of various steel types. When the price of stainless steel angle steel provided by the supplier is significantly lower than the market average, it is unreasonable and suspicious. It may be due to poor quality, non-standard material, or low-grade products produced by non-standard manufacturers. If there is a large price difference for the same type of steel, it is necessary to carefully consider whether there are quality issues.
4. Reputation of Suppliers
When purchasing stainless steel angle steel, especially in large quantities, it is necessary to understand the reputation and integrity of the suppliers in the purchase area. Excellent suppliers pay great attention to details and services before and after sales, and care more about the reputation in the industry. Purchasing personnel must compare multiple sources and make careful judgments.
5. Signing a Rigorous Transaction Contract for Procuring Stainless Steel Angle Steel
In the transaction of stainless steel angle steel, regardless of the amount of purchase, a rigorous purchase contract should be signed, specifying the type of steel, quantity, material, time, delivery period, breach of contract liability, etc., and agreeing on the rights and obligations of both parties, establishing strict legal responsibility constraints for both parties in the transaction. In this way, when there are quality issues, non-standard materials, or other disputes, they can be pursued through negotiation or legal means, minimizing risks and losses.In summary, we hope to purchase qualified stainless steel angle steel products. First, we can preliminarily judge whether the product meets quality requirements by comparing the industry standards from the appearance of the product. Secondly, if possible, use strict chemical parameter testing to determine the standard of the material; if not possible, use regular chemical reagents to make a simple judgment of the material on-site. In addition, understand the qualifications and reputation of the supplier from the side. Be very careful and cautious when the price deviation is large. Constrain the rights and obligations of both parties by signing a detailed purchase contract.
