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  2. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    Download QR code; Print/export ... it is possible to give an approximate material-specific comparison table for steels. ... 321 81: 85-41: 300 76: 80-37:

  3. Austenitic stainless steel - Wikipedia

    en.wikipedia.org/wiki/Austenitic_stainless_steel

    300 series stainless steels are the larger subgroup. The most common austenitic stainless steel and most common of all stainless steel is Type 304, also known as 18/8 or A2. Type 304 is extensively used in such items as cookware, cutlery, and kitchen equipment. Type 316, also known as A4, is the next most common austenitic stainless steel.

  4. Unified numbering system - Wikipedia

    en.wikipedia.org/wiki/Unified_numbering_system

    Many material or standard specifications include a number of different UNS numbers that may be used within that specification. For example: UNS S30400 (SAE 304, Cr/Ni 18/10, Euronorm 1.4301 stainless steel) could be used to make stainless steel bars ( ASTM A276 ) or stainless steel plates for pressure vessels ( ASTM A240 ) or pipes ( ASTM A312 ).

  5. Sverker 21 - Wikipedia

    en.wikipedia.org/wiki/Sverker_21

    Download QR code; Print/export ... It's a proprietary equivalent to D2 [tool steel]. International standards comparison chart [1 ... harder work materials. ...

  6. SAE 904L stainless steel - Wikipedia

    en.wikipedia.org/wiki/SAE_904L_stainless_steel

    904L is an austenitic stainless steel.It is softer than 316L, [1] [2] and its molybdenum addition gives it superior resistance to localized attack (pitting and crevice corrosion) by chlorides and greater resistance reducing acids; in particular, its copper addition gives it useful corrosion resistance to all concentrations of sulfuric acid.

  7. Duplex stainless steel - Wikipedia

    en.wikipedia.org/wiki/Duplex_Stainless_Steel

    Duplex stainless is widely used in the industry because it possesses excellent oxidation resistance but can have limited toughness due to its large ferritic grain size, and they have hardened, and embrittlement tendencies at temperatures ranging from 280 to 500 °C, especially at 475 °C, where spinodal decomposition of the supersaturated solid ...

  8. Pitting resistance equivalent number - Wikipedia

    en.wikipedia.org/wiki/Pitting_Resistance...

    Pitting resistance equivalent number (PREN) is a predictive measurement of a stainless steel's resistance to localized pitting corrosion based on its chemical composition. In general: the higher PREN-value, the more resistant is the stainless steel to localized pitting corrosion by chloride .

  9. Alloy 20 - Wikipedia

    en.wikipedia.org/wiki/Alloy_20

    Alloy 20 is an austenitic stainless steel containing less than 50% iron developed for applications involving sulfuric acid.Its corrosion resistance also finds other uses in the chemical, petrochemical, power generation, and plastics industries.