1. Cov khoom sib xyaw & cov khoom tseem ceeb
Q:Dab tsi txhais cov tshuaj / txhua yam khoom ntawm E355K2?
A:
Chemical (wt%):
C:Tsawg dua lossis sib npaug rau 0.20 |Mn: 0.90–1.60 | 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 (txhim kho cov nplej).
Mechanical:
Yield zog (sᵧ):Ntau tshaj lossis sib npaug rau 355 MPa |Tensile (sₜ):490-630 MPa.
Elongation (A₅):Ntau dua lossis sib npaug li 20% |Kev cuam tshuam (KV):Ntau dua lossis sib npaug rau 40J ntawm -20℃(K2npe).
Nco tseg:Cov"K2" lusUa kom muaj kev txhim kho qis -kub toughness rau Arctic/offshore siv.
2. Kev tsim khoom & qauv ua raws
Q:E355K2 raj yog tsim thiab ntawv pov thawj li cas?
A:
Txheej txheem:Feem ntauseamless(kub- dov/cold-kos); welded variants xav tau Charpy kuaj.
Kev kho cua sov: Normalized (900–950°C) or Q&T (for thickness >30 mm).
Standard Scope:TS EN 10297-1 Kev siv tshuab / qauv
3. Dimensional Tolerances
Q:Dab tsi yog qhov tseem ceeb ntawm qhov tolerances?
A:
| Parameter | Ua siab ntev | Kev cuam tshuam |
|---|---|---|
| OD | ± 1.0% (min ± 0.5 hli) | Xyuas kom nias- haum qhov tseeb |
| Phab ntsa Thickness | ± 10% (min ± 0.4 hli) | Tseem ceeb heev rau lub neej qaug zog |
| Kev ncaj | Tsawg dua los yog sib npaug li 1.5 mm / m | Qhov tseem ceeb rau rotating shafts |
4. Daim Ntawv Thov & Kev Txwv
Q:E355K2 feem ntau siv nyob qhov twg?
A:
Tsawg- Kub:Offshore platforms, Arctic pipelines (K2 toughness).
Heavy Engineering:Hydraulic thooj voos kheej kheej, crane jibs (seamless).
Zam:
Temperatures >500℃(kev pheej hmoo ntawm decarburization).
Uncoated siv nyob rau hauv marine ib puag ncig.
5. Kev lees paub zoo & ntawv pov thawj
Q:Yuav ua li cas thiaj paub tseeb?
A:
Yuav tsum xeem:
Tensile (EN ISO 6892-1)|Kev cuam tshuam (ISO 148-1 ntawm -20 degree).
NDT:100% ultrasonic (EN 10246-1) rau seamless hlab.
Cov ntawv pov thawj:EN 10204 3.2|PED 2014/68/EU (Qeb III).
