Category: Business/Financial Management
Problem description:
As the title says.
Analysis:
The number and representation method of steel (please pay attention to the international marking section, see the website for reference materials)
①Use the international chemical element symbols and the national symbols Symbols are used to represent chemical components, and *** letters are used to represent component content:
For example: China and Russia 12CrNi3A
②Use fixed-digit numbers to represent steel series or numbers; For example: United States, Japan, 300 series, 400 series, 200 series;
③Use Latin letters and order to form the serial number, which only indicates the purpose.
my country’s numbering rules
①Use element symbols
②Use, Chinese pinyin, open hearth steel: P, boiling steel: F, killed steel: B, Class A steel: A, T8: Special 8,
GCr15: Balls
◆Combined steel, spring steel, such as: 20CrMnTi 60SiMn, (C content expressed in parts per ten thousand)
◆Stainless steel and alloy tool steel (C content expressed in thousandths), such as: 1Cr18Ni9 thousandth (i.e.
0.1C), stainless steel C≤0.08 such as 0Cr18Ni9, ultra-low carbon C≤0.03 such as 0Cr17Ni13Mo
International stainless steel labeling method
The American Iron and Steel Institute uses three digits to label various standard grades of forgeable stainless steel. Among them:
①Austenitic stainless steel is represented by 200 and 300 series numbers,
②Ferrite and martensitic stainless steel are represented by 400 series numbers. For example, some of the more common austenitic stainless steels
are marked with 201, 304, 316 and 310,
③ Ferritic stainless steels are marked with 430 and 446, Martensitic stainless steel is marked with 410, 420 and 440C
and is dual-phase (austenite-ferrite).
④ Stainless steel, precipitation hardening stainless steel and iron-containing stainless steel High alloys with a weight lower than 50 are usually named by patented names or trademarks.
4). Classification and classification of standards
4-1 classification:
①National standard GB
②Industry standard YB
③Local standards
④Enterprise Standard Q/CB
4-2 Category:
①Product Standard
②Packaging Standard
③Method standards
④Basic standards
4-3 standard level (divided into three levels):
Level Y: International advanced level
Level I: International General Level
Level H: Domestic Advanced Level
4-4 National Standard
GB1220-84 Stainless Bar (Level I)
GB4241-84 Stainless welding disk (Grade H)
GB4356-84 Stainless welding disk (Grade I)
GB1270-80 Stainless Pipes (Grade I)
GB12771-91 Stainless welded pipe (Grade Y)
GB3280-84 Stainless cold plate (Grade I)
GB4237-84 Stainless hot plate (Grade I)
GB4239-91 Stainless cold strip (Grade I)