Material grade
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I’m facing a problem now and would like to ask: there are material grades such as A1, A2, 40Q1, 25K1, etc. Could someone please explain what these mean?
The OP’s question is too vague, isn’t it? Which specific materials are you referring to? ?
It might be the design institute’s own standards, which are not easy to find; thanks for your help {:1_90:}
Each design institute has its own regulations; by checking the material grade table corresponding to one’s own devices and designs, one can find out
Since in the correspondence table, material grades 25A1 and 25A2 both correspond to material 20#, it is unclear whether material grade and material are the same thing
The material grade table contains information such as pipe pressure rating, pipe material, corrosion allowance, and serial number. In our company’s notation, for example: 2CA1 – the 2 denotes a pressure class of Class150, C indicates that the pipe material is carbon steel, A represents a corrosion allowance of 1.5, and 1 is the sequence number. This is only from our company. Each design institute is different; it follows the design specifications and material grade tables provided by them. The material grade table contains a lot of information; there is also an index table that provides details such as sealing surfaces and end connections, as well as gasket materials.
It relates to equipment manufacturing; it is a material grade specified in the parameter sheet provided by the design institute