Ma waho aʻe o ka uwea ma luna o ka substrate, ʻo ka uhi metala kahi i hoʻopaʻa ʻia ai nā uea substrate i nā mea uila.
nā kumukūʻai, ʻokoʻa e pili pono i ke kumukūʻai o ka hana ʻana; Loaʻa i nā metala like ʻole ka weldability, pili, a me nā waiwai kūʻē, e pili pono i ka hana o nā ʻāpana.

ʻO nā uhi metala maʻamau:
keleawe；
Tin；

ʻO ka mānoanoa ma waena o 5 a me 15 kenimika ke alakaʻi-tin alloy (aiʻole tin-copper alloy).
ʻO ia hoʻi, solder, maʻa mau 5 a 25 m mānoanoa, me ka ʻiʻo ma kahi o 63%.

gula ； ʻO ka maʻamau e hoʻopili wale ʻia ma ka interface.

kālā