304 sanitary grade stainless steel pipe knowledge 304 stainless steel pipe knowledge
GB4237-84 stainless steel hot plate (I grade) GB4239-91 stainless cold belt (I grade)
Identification method
Steel numbering and exposure methods
Use Arabic letters to reveal the factor content: 1 Use the foreign chemical element to identify the mark and the national mark to reveal the chemical factors.
Such as: China, Russia 12CrNi3A
2 Use static digits to reveal steel series or numbers; for example: USA, Japan, 300 series, 400 series, 200 series;
Only reveal the use. 3 Form the serial number in Latin letters and methods.
National numbering rules
1 using the element identification mark
Flat furnace steel: P boiling steel: F busy steel: B A steel: AT8 special 82 use, Hanyu Pinyin.
GCr15 ball
Such as: 20CrMnTi60SiMn reveals C content with a few ten thousandths of a part) â—† Combined steel, Spring steel.
â—†Stainless steel, alloy east steel (using a few parts per thousand to reveal C content) such as: 1Cr18Ni9 one thousandth (ie
Stainless C ≤ 0.08% such as 0Cr18Ni9, 0.1% C. Ultra-low carbon C ≤ 0.03% such as 00Cr17Ni13Mo
Foreign stainless steel marking method
The American Iron and Steel Institute uses three digits to mark the various grades of malleable stainless steel:
1 Austenitic stainless steel is marked with numbers in the 200 and 300 series.
Some of the more mediocre austenitic stainless steels 2 ferritic and martensitic stainless steels are shown in the 400 series. For example.
Thus 201304316 and 310 are logos.
Martensitic stainless steels such as 410420 and 440C are standard 3 ferritic stainless steels and thus 430 and 446 are markings.
Biphasic (austenitic-ferritic) notes.
4 stainless steel, precipitation hardened stainless steel and iron alloys with less than 50% iron content are usually patented or trademarked
name.
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