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grade : cw702r鋁黃銅軋制棒

    number:     cuzn20al2as

    classification:     cupper alloy

    density     8.4 g/cm 3

    standard: en 1653:1998銅和銅合金。鍋爐、壓力容器和熱水儲存裝置用板、片和圓

en 12451:1999銅和銅合金。熱交換器用無縫圓管

en 12452:1999銅和銅合金。熱交換器用軋制翅片無縫管

en 12449:1999銅和銅合金。通用無縫圓管

en 1652:1998銅和銅合金。一般用途的板、片、帶和圓

chemical composition ％   of grade   cuzn20al2as   ( cw702r )

fe mn ni p al cu as pb others -

max   0.07 max   0.1 max   0.1 max   0.01 1.8 - 2.3 76 - 79 0.02 - 0.06 max   0.05 total 0.3 zn - remainder

mechanical properties of grade   cuzn20al2as   ( cw702r )

rm - tensile strength (mpa) (r330) 330

rm - tensile strength (mpa) (r390) 390

rp0.2 0.2％ proof strength (mpa) (r330) 90

rp0.2 0.2％ proof strength (mpa) (r390) 240

a - min. elongation at fracture (％) (r330) 30

a - min. elongation at fracture (％) (r390) 25

  vickers hardness  ( hv):   (h070) 70 - 105

  vickers hardness  ( hv):   (h100) 100