GOST 7350-77. Stal tolstolistovaya korrozionno-stoykaya, garostoykaya i garoprochnaya

Tolstolistovaya, goryachekatanaya i holodnokatanaya korrozionno-stoykaya, garostoykaya i garoprochnaya stal, izgotovlyaemaya v listah. Goryachekatanuyu tolstolistovuyu stal izgotovlyayut tolshchinoy ot 4 do 50 mm, holodnokatanuyu ot 4 do 5 mm.

Tolstolistovuyu stal izgotovlyayut sleduyushchih marok:

20H13, 09H16N4B, 12H13, 14H17N2, 08H13, 12H17, 08H17T, 15H25T, 07H16N6, 09H17N7YU, 08H22N6T, 12H21N5T, 08H21N6M2T, 20H23N13, 08H18G8N2T, 15H18N12S4TYU, 10H14G14N4T, l2X17G9AN4, 08H17N13M2T, 10H17N13M2T, 10X17H13M3T, 08H17N15M3T, 12H18N9, 17H18N9, 12H18N9T, 04H18N10, 08H18N10, 08H18N10T, 12H18N10T, 08H18N12T, 12H18N12T, 08H18N12B, 03H21N21M4GB, 03H22N6M2, 03H23N6, 20H23N18, 12H25N16G7AR, 06HN28MDT, 03HN28MDT, 15H5M

Tolstolistovuyu korrozionno-stoykuyu, garostoykuyu i garoprochnuyu stal podrazdelyayut:

• po sostoyaniyu materiala i kachestvu poverhnosti na gruppi:
  • holodnokatanaya nagartovannaya - H1,
  • holodnokatanaya polunagartovannaya - PN1,
  • holodnokatanaya, termicheski obrabotannaya,
  • travlenaya ili posle svetlogo otgiga - M2a, M3a, M4a, M5a,
  • holodnokatanaya termicheski obrabotannaya - M5v,
  • goryachekatanaya termicheski obrabotannaya,
  • travlenaya ili posle svetlogo otgiga - M2b, M3b, M4b, M5b,
  • goryachekatanaya termicheski obrabotannaya netravlenaya - M5g,
  • goryachekatanaya bez termicheskoy obrabotki i netravlenaya - 5d;
• po tochnosti prokatki:
  • povishennoy tochnosti - A,
  • normalnoy tochnosti - B;
• po vidu kromok na:
  • obreznuyu - O,
  • neobreznuyu - NO;
• po neploskostnosti listov s vremennim soprotivleniem 690 N/kv.mm i menee na:
  • osobo visokuyu ploskostnost - PO;
  • visokuyu ploskostnost - PV,
  • uluchshennuyu ploskostnost - PU,
  • normalnuyu ploskostnost - PN.

Dopuskaetsya izgotovlyat tolstolistovuyu stal s tochnostyu prokatki bolee visokoy, chem ukazano v zakaze.