Marka la barbar dhigo birta caadiga ah,bir gaar ahWaxay leedahay xoog sare iyo adkeyn, astaamo jireed, guryaha kiimikada, biocompattatenimada iyo waxqabadka nidaamka. Laakiinbir gaar ahWaxay leedahay astaamo kala duwan oo ka socda birta caadiga ah. Loogu talagalay birta caadiga ah Dad badan ayaa ah waxgarasho badan, laakiin astaamahabir gaar ahDad badan ayaa sheegay in aad u jahwareersan tahay. Sidaa darteed, maqaalka soo socdaa wuxuu diiradda saarayaa astaamahaSeedaha gaarka ah.
Tilmaamaha birta khaaska ah:
Marka la barbar dhigo birta caadiga ah,bir gaar ahWaxay leedahay astaamaha daahirka sare, isku-xirnaanta sare, qaab dhismeedka ganaaxyada iyo saxda ah:
(1)Daahir sare.Waxa ku jira gaaska iyo ka soo jeedinta (oo ay ku jiraan birta bir ah oo leh dhibic dhalaalaysa) ee birta waa la dhimi karaa. Marka daahirsanaanta birta ayaa kor u kaca xadka qaarkood, oo aan ahayn oo keliya guryaha asalka ah ee birta si weyn loo wanaajin karo, laakiin sidoo kale guryaha cusub ee birta ayaa la soo bandhigi karaa. Tusaale ahaan, waxyaabaha oksijiinka ah ee qaadista birta waxaa laga yareeyaa 30 × 10- 10-6 ilaa 5 × 10-6, oo nolosha korsashadana waxaa la kordhiyaa 30 jeer. Seedaha aan caadiga ahayn ee 'auusticic' oo aan caadi ahayn ayaa ah kuwa difaaca ah ee ku kordhaya xarkaha goorta ay ku jirto fosfooraska-fosprorus-ka lagu yareeyo 3 × 10-6. At the end of the 20th century, the purity level (10) of steel that can be achieved by mass production is: hydrogen ≤1, oxygen ≤5, carbon ≤10, sulfur ≤10, nitrogen ≤15, phosphorus ≤25.

(2) isku mid ahaansho sare.Kala sooca ka kooban ee birta waxay horseedaa qaab-dhismeedka aan sinnayn iyo astaamaha birta, kaas oo ka mid ah sababaha muhiimka ah ee fashilka hore ee qaybaha birta iyo dhibaatada si buuxda u adeegsiga guryaha suuragalka ah ee birta. Teknolojiyadda soosaarka casriga ah waa inay ka dhigtaa midnimada sinnaanta ee birta ah: Bandhigga Kooxda Qalabka Gear Gear Stree Derenelety waa ± 3hrc; Waxyaabaha kaarboon, nikkel, molybdenum ≤ ± 0.01%, iyo manganese iyo chromium ≤.02% si sax ah ayaa loo xakameeyay. Cabbirka hadhuudhka ee saliida ka dib markii la demiyo waa laf-dhabarta iyo cabirka cabirka waa 0.8 ± 0.2 μm. Sifooyinka farsamada ee loo yaqaan 'makaanihii loo yaqaan' jeexitaanka steel loo yaqaan 'jeexitaanka' '
(3) Qaab dhismeedka wanaagsan.Xoogga xoojinta Ultra---Gamman waa habka kaliya ee xoojin kara xoogga birta iyada oo aan hoos u dhicin ama waxyarna kordhineyso. Tusaale ahaan, markii cabirka hadhuudhka ee ifica sare ee steel-ka adag ee Stewns Stel Afc77 loo safeeyaa ilaa 2.3 μm, oo jabsaday KIC-ga adag ee KIC wuxuu kordhaa 100 ilaa 220mpa · m. Heerkulka casriga ah ee cabasha ee loo yaqaan 'cagaarka' ee loo yaqaan 'birta casharka' birta bir-qaadka ugu badan ee weelka nukliyeerka ah waa 150 ~ 250 ℃ halka birta ganaax ganaax ah ay tahay 50 ~ 70 ℃. Markii cabirka gaariga ee saliida lagu qaado bir bir uu ku fiican yahay ≤0.5μm, nolosha nolosha si weyn ayaa loo horumarinayaa.
(4) Si sax ah. Seedaha gaarka ahwaa inuu lahaadaa culeys sare oo dusha sare iyo culeys ciriiri ah. Saxnimada ee saliida kulul ee kulul ee kulul ayaa ku jirta ± 0.1mm, dulqaadka qafiifka ah ee xaashida kulul ee kulul ayaa ah ± 0.015 ~