Hoʻokaʻawale ʻia nā uhi manhole hao i loko o nā uhi manhole ductile a me nā uhi manhole hina hina, ma ka ʻōlelo maʻamau, ʻo ke kaumaha like o nā uhi manhole ductile ma mua o ka uhi manhole hina hina.ʻO ka mea i hoʻohana ʻia no ka uhi manhole hao hina ka maʻamau HT200, a ʻo ka mea i hoʻohana ʻia no ka uhi manhole ductile ink manhole maʻamau QT500-7.

ʻO nā hiʻohiʻona o ka uhi manhole ink spheroidal:

ʻO ka paʻakikī maikaʻi.Ua like ka waiwai o ka hopena me ke kila kalapona waena a ʻoi aku ma mua o 10 mau manawa o ka hao hina.

ʻO ka pale ʻana i ka corrosion ikaika.ʻO ka hoʻāʻo ʻana i ka corrosion wai, 90 mau lā o ka corrosion he 1/40 wale nō ka paipu kila, ʻo 1/10 ka paipu hao hina.ʻO ke ola lawelawe he 2 mau manawa o ka paipu hao hina a me 5 manawa o ka paipu kila maʻamau.

ʻO ka plasticity maikaʻi.ʻO ka lōʻihi≥7%, e like me ke kalapona kila kiʻekiʻe, ʻoiai ʻo ka elongation mea hao hina he ʻole.

Ka ikaika kiʻekiʻe.Ka ikaika ob≥420MPa, hoʻoulu i ka ikaika os≥ʻO 300MPa, a me ke kila kalapona haʻahaʻa like, ʻekolu manawa o ka mea hao hina.

Noi: alanui aupuni, alaloa, kamaʻilio, mana, wai paipu, kaiāulu, kula a me nā paka ʻē aʻe.