Steel U9

  • U16 steel (EI336)
  • U9A steel
  • U9 steel
  • U8GA steel
  • U8G steel
  • U8A steel
  • U8 steel
  • U7A steel
  • U7 steel
  • U12A steel
  • U12 steel
  • U11A steel (U11)
  • U10A steel
  • U10 steel
  • Steel AU10E (ASU10E)
  • A85 steel
  • Steel A75 (U7AB)

    • Designation

    Name The value
    Designation GOST Cyrillic У9
    Designation GOST Latin U9
    Transliteration U9
    By chemical elements 9

    Description

    Steel U9 is used: for the manufacture of tools, working in conditions without heating of cutting edge; the tool for tree processing (milling cutters, countersinks, zekovic, axes, chisels, chisels, longitudinal, and circular saws; rollers, plates and rods for mold molding tin-swinomish alloys; calibers simple form and low accuracy classes; cold-rolled heat-treated ribbon with a thickness of from 2.5 to 0.02 mm, intended for manufacturing of flat and wire springs and spring-loaded parts of complex configuration (valves, styli, reeds, slats dolnych knives structural fine details, including hours, etc. (tape is produced according to GOST 2283, GOST 21996 and a number of special technical conditions).

    Standards

    Name Code Standards
    Tape В34 GOST 10234-77
    Sheets and strips В23 GOST 103-2006
    Bars and shapes В22 GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
    Bars and shapes В32 GOST 1435-99, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88, TU 14-1-1271-75
    Sheets and strips В33 GOST 4405-75, TU 14-131-971-2001
    Steel wire medium and high carbon В72 GOST 5468-88, GOST 9389-75

    Chemical composition

    Standard C S P Mn Cr Si Ni Fe Cu
    GOST 1435-99 0.85-0.94 ≤0.028 ≤0.03 0.17-0.33 ≤0.2 0.17-0.33 ≤0.025 Rest ≤0.025
    Fe is the basis.
    According to GOST 1435-99, the mass fraction of chromium, nickel and copper is indicated for 1 group of metal products. The mass fraction of sulfur in steel obtained by the electroslag remelting method should not exceed 0.013%. In the metal products of the third group, the mass fraction of Cr ≤ 0.20-0.40%, Ni ≤ 0.25%, Cu ≤0.25%. In metal products of the 1 st and 3 rd groups, made of steel obtained by scrap-process, the mass fractions of nickel, copper and chromium are increased by 0.05% of each element as compared to those in the table. In a metal designed for the manufacture of cold-rolled strip, an increase in the mass fraction of nickel, copper and chromium is not allowed.

    Mechanical properties

    Section, mm σU, MPa d4 d
    Tape flatted average strength of 0.1-4.0 mm according to GOST 10234-77 in the state of delivery (indicated delivery)
    - 740-1270 - -
    - ≤780 - ≥8
    Annealed cold-rolled tape of the highest quality
    4 ≤750 ≥10 -
    Cold-rolled steel strip sagatovna (specified strength class)
    0.1-4 750-900 - -
    0.1-4 900-1050 - -
    0.1-4 1050-1200 - -

    Description mechanical marks

    Name Description
    σU Limit short-term strength
    d4 Elongation after rupture
    d Elongation after rupture

    Physical characteristics

    Temperature Е, HPa G, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C
    0 207 79 7745 - - -
    20 207 - 7745 - - -
    100 - - 7726 49 253 113
    200 - - 7717 48 329 121
    300 - - 7690 46 418 129
    400 - - 7686 43 525 136
    500 - - 7655 40 646 142
    600 - - 7622 37 789 147
    700 - - 7586 33 943 152
    800 - - 7568 - 1155 152
    900 - - 7523 - 1198 -
    1000 - - - - - 14

    A description of the physical symbols

    Name Description
    Е The normal elasticity modulus
    l Coefficient of thermal conductivity
    a The coefficient of linear expansion
    С Specific heat

    Technological properties

    Name The value
    Weldability does not apply to welded structures.
    Склонность к отпускной хрупкости tend not
    The temperature of forging Start - 1125 °C, the end - 750 °C.
    Flock-sensitive sensitivity not sensitive