what is NM450 equivalent
Steel grades and their equivalents are important for studying in foreign countries, as different countries have their own systems of classifying and denoting various steel grades. In China, the most widely used steel grade system is the GB/T700 and GB/T1591 standards. In the United States and Canada, the most commonly used steel grade system is the ASTM system. Here we take a look at the equivalent grades of steel grade in China and the United States, as well as a comparison of their respective common uses.
China: GB/T700-2006 and GB/T1591-2008
China has two grade systems for steel grade designations - the GB/T700 and GB/T1591 standards. The GB/T700 standard is used to classify carbon structural steel and low alloy structural steel. NM450 is the designation for Chinese GB/T1591 steel grade. It is equivalent to ASTM A572 and ASTM A709, both of which are commonly used in the United States. The equivalent of NM450 is ASTM A572 Grade 50, which is commonly used in structural applications such as bridges and buildings. ASTM A572 Grade 50 is stronger than Chinese GB/T1591 grade NM450 but is slightly softer than ASTM A709 Grade 50, which is made of quenched and tempered carbon and alloy steel.
United States: ASTM A572 and ASTM A709
As mentioned, the ASTM A572 and ASTM A709 steel grade systems are the common steel grade designations in the United States. ASTM A572 is a high-strength, low-alloy carbon steel, alloyed with manganese, phosphorus, sulfur and silicon. It is often referred to as high-strength low-alloy (HSLA) steel. ASTM A709 is also a high-strength, low-alloy steel, but it is primarily used for bridge and building construction. The ASTM A709 grade designation is used to denote different strengths and composition levels of steel. The ASTM A709 Grade 50 is the ASTM equivalent of NM450, the Chinese GB/T1591 grade. It is slightly stronger but slightly softer than ASTM A572 Grade 50.
Common Uses
The Chinese GB/T1591 grade NM450 is typically used in construction applications such as bridges, buildings and other structural components. Likewise, the ASTM A572 Grade 50 and ASTM A709 Grade 50 are often used to build bridges and buildings, as well as other structural applications. The ASTM A709 grade also has higher ductility and toughness than the ASTM A572 Grade 50 grade, making it an ideal choice for structural applications.
In conclusion, the ASTM A572 and ASTM A709 steel grade systems are the most commonly used steel grade systems in the United States and China. NM450 is the Chinese GB/T1591 steel grade equivalent to ASTM A572 Grade 50 and ASTM A709 Grade 50. Both of these steel grade systems are used in construction and other structural applications.
