The manufacturer of the steel plate tells you the national standard and quality inspection of the steel plate.

Threaded steel and construction wire rods (bars) are compulsory norms of the state, and all products produced must conform to the corresponding norms. The national standard of non construction wire rod and hot rolled coil is a recommendation norm. In the production process, in addition to the selection of national norms, there are some steel plants to choose industry norms or enterprise norms.
The supply situation and characteristics of crude steel and steel plate output value in China
Before the 2008 financial crisis, China's crude steel and steel products maintained a high-speed increase, in which the output value of crude steel increased by 24.6%, 18.5% and 15.7% respectively in 2005, 2006 and 2007, and the output value of steel increased by 24.1%, 24.5% and 22.7% respectively. Affected by the financial crisis, China's crude steel and steel output value in 2008 fell to 1.1% and 3.6% respectively. From the beginning of 2009, China's crude steel and steel output value gradually slowed down, according to the data released by the National Bureau of Statistics, China's crude steel output value in 2013 779.04 million tons, an increase of 7.5%, 123% compared with 2005, annual composite increase rate of 10.5%; steel output value of 1067.62 million tons, an increase of 11.4%, 187.6% compared with 2005, annual composite increase. The rate is 14.1%.
The provinces and cities with the largest output value of crude steel in China are Hebei, Jiangsu and Shandong, respectively. The output value of crude steel in 2013 was 18.8449 million tons, 84.691 million tons and 61.19 million tons, accounting for 24.2%, 10.9% and 7.9% of the domestic output value of crude steel. The crude steel output value of the top 10 provinces and municipalities is 563 million 524 thousand tons, accounting for 72.3% of the gross domestic steel output value.
The provinces and municipalities with the largest steel plate output value in China are Hebei Province, Jiangsu Province and Shandong Province in turn. The steel output value in 2013 was 22.8616 million tons, 12.298 million tons and 8.911 million tons, respectively, accounting for 21.4%, 11.6% and 7.6% of the domestic steel output value. The output value of the first 10 provinces and cities is 761 million 668 thousand tons, accounting for 71.3% of the total output value of domestic steel. The output value of the top 10 provinces and cities in China in the past 2011-2013 years