1. Cov khoom sib xyaw & cov khoom tseem ceeb
Q:Dab tsi txawv E275K2 chemically thiab mechanically?
A:
Chemical (wt%):
C:Tsawg dua lossis sib npaug rau 0.18 |Mn: 0.50–1.40 | P:Tsawg dua lossis sib npaug rau 0.025 |S:Tsawg dua lossis sib npaug rau 0.020 |Al:Ntau dua los yog sib npaug rau 0.020 (rau cov nplej ua kom zoo).
Mechanical:
Yield zog (sᵧ):Ntau tshaj lossis sib npaug rau 275 MPa |Tensile (sₜ):410-560 MPa.
Elongation (A₅):Ntau dua lossis sib npaug li 24% |Kev cuam tshuam (KV):Ntau dua lossis sib npaug rau 27J ntawm -20℃(K2 xaiv).
Nco tseg:Cov"K2" lusqhia tau hais tias ua kom qis qis -kub toughness.
2. Kev tsim khoom & qauv ua raws
Q:E275K2 raj yog tsim thiab ntawv pov thawj li cas?
A:
Txheej txheem:Seamless (kub-rolled/cold-drawn) los yog welded (ERW/SAW nrog kev kuaj ntxiv).
Kev kho cua sov:Raws li kev cai (880-920 degree) kom tau raws li EN 10297-1 §6.2.
Ntsiab Standard:TS EN 10297-1 (rau kev siv tshuab / qauv)
3. Dimensional Tolerances
Q:Dab tsi kam rau ua rau E275K2 raj?
A:
| Parameter | Ua siab ntev | Kev thuam |
|---|---|---|
| OD (D) | ± 1.0% (min ± 0.5 hli) | Xyuas kom haum rau hauv cov rooj sib txoos |
| Phab ntsa Thickness | ± 10% (min ± 0.3 hli) | Muaj feem xyuam rau lub siab tsis kam |
| Kev ncaj | Tsawg dua lossis sib npaug li 1.5 mm / m (txias- kos: Tsawg dua lossis sib npaug rau 1.0) | Tseem ceeb rau cov khoom siv ntev |
4. Daim Ntawv Thov & Kev Txwv
Q:E275K2 feem ntau siv nyob qhov twg?
A:
Tsawg- Kub:Offshore qauv, Arctic pipelines (ua tsaug rau K2 toughness).
General Engineering:Hydraulic thooj voos kheej kheej, crane booms (seamless).
Zam:
Temperatures >400℃(kev pheej hmoo ntawm scaling).
Highly acidic ib puag ncig yam tsis muaj coatings.
5. Kev lees paub zoo & ntawv pov thawj
Q:Yuav ua li cas paub zoo rau E275K2 raj?
A:
Yuav tsum xeem:
Tensile (EN ISO 6892-1)|Kev cuam tshuam (ISO 148-1 ntawm -20 degree).
Optional Tests:
Ultrasonic (EN 10246-1)|Hydrostatic (EN ISO 10893-4)
Cov ntawv pov thawj:EN 10204 3.1/3.2|PED 2014/68/EU (Qeb II/III).
