20 # Hlau Yeeb Nkab
wb 3087： Seamless steel yeeb nkab rau qis thiab nruab nrab siab boiler
wb 9948: Seamless steel yeeb nkab rau roj av tawg
wb 6479: Seamless steel kav rau high-pressure chiv khoom
GB / T17396： Kub dov seamless steel yeeb nkab rau hydraulic prop
20 # hlaubelongs rau high-zoo low-carbon steel, txias-extruded thiab hardened steel. Cov hlau tsis muaj zog, zoo toughness, plasticity thiab weldability. Nws belongs rau high-quality low-carbon steel, txias-extruded thiab hardened steel. Cov hlau tsis muaj zog, zoo toughness, plasticity thiab weldability. Nws feem ntau yog siv los tsim cov kav dej seamless uas tsis tshua muaj kev ntxhov siab thiab siab toughness.
| Qib | Qhov Loj | ||||||||||||||
|
| OD | WT | |||||||||||||
| 20# | 21-1200 Nws | 3-130 | |||||||||||||
| Qib | Chemical Cheebtsam% | ||||||||||||||
|
| C | Si | Mn | Cr | Mo | V | Ti | B | Ni | Cu | Nb | N | W | P | S |
| 20# | 0.17- | 0.17- | 0.35- | ≤ | — | — | — | — | ≤ | ≤ | — | — | — | ≤ | ≤ |
| Qib | Mechanical Property | ||||||||||||||
|
| Tensile zog (MPa) | Tensile zog (Mpa) | Kev xa tawm (L / T) | Kev cuam tshuam (J) Vertical / Kab rov tav | Hardness (NB) | ||||||||||
| 20# | 410- | ≥ | ≥20% | ≥40/27 | — | ||||||||||
1. Lub sij hawm xa tuaj: Cov khoom lag luam loj ua kom lub sijhawm xa khoom tsawg kawg nkaus, feem ntau yog 5-7 hnub.
2. Kev tswj hwm tus nqi: Cov peev txheej ntawm tes thiab kev paub dhau los ntawm kev tswj hwm tus nqi cia peb tuaj yeem muab cov peev txheej tsim nyog tshaj plaws ntawm cov neeg siv khoom xav tau
3. Cov peev txheej saum toj kawg nkaus: tuaj yeem muab daim ntawv pov thawj tag nrho thiab cov ntaub ntawv tsim nyog los ua pov thawj zoo thiab muab kev txhawb nqa rau kev sib tw.
4. nruj QC system: Tag nrho cov khiav ntawm qhov chaw soj ntsuam, tag nrho cov kev xeem thiab qhia, thib peb-tog soj ntsuam
5. Tom qab kev pab cuam: tag nrho cov khoom traceable, Tracing qhov kev lav ris
