20 # steel yeeb nkab
GB3087: Seamless steel yeeb nkab rau tsawg thiab nruab nrab siab boiler
GB9948: Seamless Steel Yeeb Rau Petroleum Cracking
GB6479: Seamless Steel Kav Rau Cov Khoom Siv Siab Chiv
GB / T17396: Kub dov seamless steel yeeb nkab rau hydraulic prop
20 # steelbelongs rau cov zoo-cov roj carbon carbon carbon carbon carbon, txias-extruded thiab tawv hlau. Cov hlau muaj lub zog tsawg, kev ua tau zoo, cov yas thiab weldability. Nws zwm rau cov zoo-cov roj carbon carbon carbon carbon, txias-extruded thiab tawv hlau. Cov hlau muaj lub zog tsawg, kev ua tau zoo, cov yas thiab weldability. Nws yog feem ntau siv los tsim cov kav dej seamless nrog kev ntxhov siab qis thiab siab yuav tsum tau ua.
| Teem nqi | Loj npaum li cas | ||||||||||||||
|
| OD | WT | |||||||||||||
| 20 # | 21 ~ 1200 | 3 ~ 130 | |||||||||||||
| Teem nqi | Kev Siv Tshuaj Tiv Thaiv% | ||||||||||||||
|
| C | Si | Mn | Cr | Mo | V | Ti | B | Ni | Cu | Nb | N | W | P | S |
| 20 # | 0.17- | 0.17- | 0.35- | ≤ | - | - | - | - | ≤ | ≤ | - | - | - | ≤ | ≤ |
| Teem nqi | Cov Cuab Yeej Cuab Yeej Cuab Yeej | ||||||||||||||
|
| Tensile lub zog (mpa) | Tensile lub zog (mpa) | Elogation (L / T) | Cuam tshuam (j) Ntsug / kab rov tav | Hardness (NB) | ||||||||||
| 20 # | 410- | ≥ | ≥20% | ≥40 / 27 | - | ||||||||||
1. Lub sijhawm xa khoom: Cov lus nug loj ua kom paub tseeb tias tus me nyuam lub sijhawm, feem ntau yog 5-7 hnub.
2. Kev tswj hwm tus nqi: Cov Khoom Siv ntawm Tes thiab kev txhawb nqa tus nqi tswj hwm cia peb tuaj yeem muab cov kev tsim nyog ua ke nrog cov neeg siv khoom
3. Sab saum toj Mill Resign): tuaj yeem muab daim ntawv pov thawj tso tag nrho thiab cov ntaub ntawv tsim nyog los ua pov thawj cov khoom lag luam zoo thiab muab kev txhawb nqa.
4. Strict QC system: Tag nrho cov Flow ofsite Surchection, tag nrho xeem thiab tshaj tawm, kev tshuaj xyuas thib peb
5. Tom qab kev pabcuam: Txhua yam khoom traceable, tracing lub hauv paus ntawm kev lav phib xaub
