c69720 硅黃銅(復雜黃銅)

astm b371 c69720 astm b371/b371m introduction

astm b371 c69720 astm b371/b371m規格齊全,產品廣泛應用于航空航天、石化、建筑工程等領域,對產品要求低,加工方便,尺寸精度要求低。并提供切割、彎曲、焊接、鉆孔等加工服務。

用途：銅鋅硅合金帶材規格。

heat treated: 1518°c - 1921°c.

astm b371 c69720 astm b371/b371m chemical

steel grade b371 c69720 composition information, astm b371 c69720 astm b371/b371m element content, astm b371 c69720 astm b371/b371m heat treatment, astm b371 c69720 astm b371/b371m chemistry

element min max similar

zn - - -

si 2.5 3.5 -

pb 0.5 1.5 -

p 0.03 0.06 -

mn - 0.4 -

fe - 0.2 -

cu 75 80 -

astm b371 c69720 astm b371/b371m mechanical

yield tensile impact elongation reduction in cross section on fracture as-heat-treated condition brinell hardness (hbw)

rp0.2 (mpa) rm (mpa) kv/ku (j) a (％) z (％)

137 (≥) 853 (≥) 41 41 22 solution***aging, annealing, ausaging, q+t,etc 111

astm b371 c69720 astm b371/b371m physical

physical properties of astm b371 c69720 astm b371/b371m mainly cover modulus of elasticity, coefficient of thermal expansion, thermal conductivity, specific thermal capacity, electrical resistance value, density, poisson's ratio, etc.

temperature modulus of elasticity mean coefficient of thermal expansion 10-6/(°c) between 20(°c) and thermal conductivity specific thermal capacity specific electrical resistivity density poisson’s coefficient, ν

(°c) (gpa) (w/m·°c) (j/kg·°c) (ω mm2/m) (kg/dm3)

43 - - 0.42 -

325 242 - 12.3 124 -

241 - 44 12.2 313 234

astm b371 c69720 astm b371/b371m processing