Steel pipe ngu ai gaw, n-gang hte galaw da ai hka htung langai rai nna, madung hku nna, magri, carbon, silicon, hte manganese zawn re ai n-gang amyu myu hte hpawng de da ai. Hkum hkrang n-gun grai kaja ai majaw, gawgap ai lam, hka lawng ni hte kaga lamu ga ni hta grai lang ai arung arai langai mi rai nga ai. Steel pipe a hkum hkrang atsam a hpang na npawt tara ni hpe sawk sagawn yu ga.
1. Molecular lajang ai lam
Steel pipe hta lawm ai molecule ni gaw grai n-gun ja ai majaw, katsi ai aten hta n-gun n rawng hkra pat shingdang da ai. Steel pipe a n-gun hte n-gun n-gun hpe ninghkap lu ai atsam gaw shi a molecular structure hta madung nga ai, dai majaw galaw shapraw ai aten hta rawt jat galu kaba wa ai galaw shapraw ai ladat ni hte hpaji masa ni ra nga ai.
2. Tsan ai lam
Steel pipe hpe galaw na matu lang ai arung arai a san seng ai lam grau law wa yang, shi a hkum hkrang hpe grau kaja hkra galaw lu na re. High{1}}purity steel gaw laklai ai mam lamu ga jarit ni hte n kaja ai lam n law ai majaw, grau kaja ai n-gun atsam hte ngang kang ai lam ni hpe shabyin ya ai.
3. Kaja dik htum High- Hpaji hpe ninghkap lu ai atsam
Steel pipe gaw nbung laru kaba hta n-gun n rawng ai majaw, shi a molecule ni gaw grai n-gun ja ai majaw, thermal jat wa ai hte n-gun yawm wa ai majaw, n-gun n law ai. Ndai lam gaw nbung katsi ai shara hta n-gun n-gun hpe pat shingdang ya ai. Steel pipe gaw grai kaja ai{2}} n-gun ja ai hpe ninghkap lu ai atsam nga ai rai nna, tsaw ai{3}} n-gun n-gun n-gun ni hta shim lum ai hku jai lang mai ai.