What is the hardness of 09CuPCrNi-A weathering steel?

In February 2019, the European Union stated that the sharp increase in Turkish 09CuPCrNi-A weathering steel and so on steel imports has seriously threatened steel production enterprises in member states. The EU has set import quotas for 26 steel products and imposed a 25% tariff on steel products imported in the future for a period of three years. The Turkish Trade Ministry said on Friday that Turkey had initiated a lawsuit against the EU on steel import tariffs with the World Trade Organization (WTO).20G steel is boiler steel, which is similar to No. 20 carbon steel. The difference is that 20G steel has higher and stricter inspection standards than 09CuPCrNi-A weathering steel, No. 20 carbon steel for harmful impurities and internal defects. That is to say, 20G steel is specially produced for boiler pressure vessels. It is special purpose "No. 20 carbon steel". The use of 20G steel to make boilers is not because it is more resistant to burning than other steels such as 09CuPCrNi-A weathering steel, but because of its strength, toughness, ductility, weldability, temperature influence, fatigue fracture, price and cost, etc. 20G steel is most suitable for use in medium and low pressure boilers.Cold formed hot rolled automotive structural steel QSTE420TM plateMaterial/brand: QSTE420TMExecutive standard: Q/BQB 310Chemical composition (melting analysis)%Carbon: ≤0.12, Silicon: ≤0.35, Manganese: ≤1.50, Phosphorus: ≤0.05, S: ≤0.025, Titanium: ≤0.22, Niobium: ≤0.09, Aluminum: ≥0.01Mechanical propertiesYield strength MPa: ≥420Tensile strength MPa: 480-620Elongation: ≥21When providing technical services on site, the after-sales personnel shall strictly abide by the safety rules and regulations of the construction site, consciously take safety protection measures (such as wearing safety helmet when entering the construction site), accept the supervision and management of the site; without permission on the construction site, they shall not dismantle, smear or damage any goods; the commissioning of contract goods shall be carried out under the supervision of the site supervisor If necessary, it shall be approved by the site supervisor or the person in charge of the project department.