Carbon Steel American Standard ASTM Standard Equivalent Chinese Standard
The global nature of the steel industry often necessitates the need to find equivalences between different country-specific standards. This is particularly true when comparing carbon steel grades, as each country may have its own unique classification system. In the case of China and the United States, the Chinese grade standards and American ASTM standards are commonly referenced. In this article, we will explore the process of finding the Chinese grade standard that corresponds to the American ASTM standard for carbon steel, providing a comprehensive guide for professionals and enthusiasts in the field.
Chinese Grade Standards:
China has its own set of grade standards for carbon steel, which are typically denoted by the prefix “GB” (Guo Biao) followed by a numeric code. These standards are established by the Standardization Administration of China (SAC) and are widely adopted in various industries within the country. It is essential to note that while there may not be a direct one-to-one equivalence between Chinese and American standards, there are often comparable grades that can serve as substitutes.
Exploring American ASTM Standards:
The American Society for Testing and Materials (ASTM) is a widely recognized organization responsible for creating and maintaining standards across a wide range of industries, including carbon steel. ASTM standards for carbon steel are denoted by the prefix “ASTM” followed by an alphanumeric code and are extensively used in the United States and around the world.
Finding the Chinese Grade Equivalent:
To find the Chinese grade standard corresponding to a specific American ASTM standard for carbon steel, one can follow these steps:
Identify the ASTM standard: Determine the specific ASTM standard for the desired carbon steel grade. For example, ASTM A36 is a commonly used standard for structural carbon steel.
Cross-reference tables: Several resources provide cross-reference tables or databases that offer comparisons between Chinese and American steel grades. These references can be found in handbooks, industry publications, and online platforms. One widely used resource is the “SteelOrbis Grade Equivalency Tool,” which offers comparisons between different international steel grades.
Consult steel manufacturers and suppliers: Reach out to Chinese steel manufacturers and suppliers who are knowledgeable about international standards and can provide guidance on the Chinese grade equivalent to a particular ASTM standard. They possess valuable expertise in navigating the Chinese grade system and can offer insights based on their experience in the industry.
Engage with industry experts: Participate in industry forums, conferences, or online communities where professionals from the steel industry share knowledge and experiences. Engaging with experts in the field can provide valuable information and guidance on finding the Chinese grade equivalent to a specific ASTM standard.
Collaborate with international standards organizations: Organizations such as the International Organization for Standardization (ISO) or the American Iron and Steel Institute (AISI) often collaborate with their Chinese counterparts to promote harmonization and equivalence of standards. These organizations can provide relevant information on cross-referencing Chinese and American steel grades.
Here are some commonly used American Standard ASTM carbon steels and their corresponding Chinese carbon steel grades:
ASTM A36: This is a widely used standard for structural carbon steel in the United States. The corresponding Chinese carbon steel grade is Q235B or Q235D, which falls under the GB/T 700-2006 standard.
ASTM A53: This standard covers seamless and welded black and hot-dipped galvanized steel pipe. The equivalent Chinese carbon steel grade is 20# (20G) under the GB 8163-2008 standard.
ASTM A106: This specification covers seamless carbon steel pipe for high-temperature service. The corresponding Chinese carbon steel grades are 20G, 20MnG, and 25MnG under the GB 5310-2008 standard.
ASTM A105: This specification covers forged carbon steel piping components for ambient and high-temperature service. The corresponding Chinese carbon steel grade is 20# (20G) under the GB/T 699-2015 standard.
ASTM A516: This specification covers carbon steel plates intended primarily for service in welded pressure vessels. The corresponding Chinese carbon steel grade is Q345R under the GB 713-2014 standard.
ASTM A572: This specification covers high-strength low-alloy structural steel shapes, plates, and bars. The corresponding Chinese carbon steel grade is Q345B under the GB/T 1591-2008 standard.
ASTM A283: This specification covers low and intermediate tensile strength carbon steel plates. The corresponding Chinese carbon steel grade is Q235A under the GB/T 700-2006 standard.
ASTM A515: This specification covers carbon-silicon steel plates primarily for intermediate- and higher-temperature service in welded boilers and other pressure vessels. The corresponding Chinese carbon steel grade is Q245R under the GB 713-2014 standard.
It’s important to note that while these Chinese carbon steel grades are considered comparable to their American ASTM counterparts, there may be slight differences in chemical composition and mechanical properties. Therefore, it is advisable to consult relevant standards and industry experts for specific applications and requirements.
Conclusion:
Finding the Chinese grade standard equivalent to the American ASTM standard for carbon steel requires a combination of research, cross-referencing, and collaboration with industry experts. By leveraging available resources, engaging with steel manufacturers and suppliers, and staying connected with the steel community, professionals can successfully identify comparable Chinese grades that align with specific ASTM standards. The ability to navigate these equivalences ensures seamless communication, trade, and cooperation within the global steel industry.
