1. Cov khoom sib xyaw & cov khoom tseem ceeb
Q:Dab tsi txhais cov tshuaj thiab cov khoom siv ntawm E355 steel?
A:
Chemical Composition (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 |Si:Tsawg dua los yog sib npaug li 0.55.
Mechanical Properties:
Yield zog (sᵧ):Ntau tshaj lossis sib npaug rau 355 MPa |Tensile zog (σₜ):490-630 MPa.
Elongation (A₅):Ntau dua lossis sib npaug li 18% |Hardness:Tsawg dua lossis sib npaug li 180 HB.
Nco tseg:E355 yog asiab- zog, zoo- steel hlaunrog nruab nrab weldability (Ceq Tsawg dua lossis sib npaug rau 0.47).
2. Kev tsim khoom & qauv ua raws
Q:EN 10297-1 E355 raj ua li cas?
A:
Txheej txheem:Feem ntauseamless(kub-kub lossis txias-kos); welded (ERW / SAW) variants yuav tsum tau kuaj ntxiv.
Kev kho cua sov:Normalizing (900-950 degree) los yog quenching / tempering (rau alloyed qib).
Standard Scope:Npog cov raj raumechanical, structural, thiab hydraulic applications.
3. Dimensional Tolerances
Q:Dab tsi yog qhov tseem ceeb ntawm qhov tolerances?
A:
| Parameter | Kev kam rau siab (EN 10297-1) | Kev cuam tshuam |
|---|---|---|
| OD (D) | ± 1.0% (min ± 0.5 hli) | Xyuas kom haum rau hauv cov rooj sib txoos |
| Phab ntsa Thickness | ± 10% (min ± 0.4 hli) | Muaj feem cuam tshuam rau kev ntsuas siab |
| 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 ncej ntev |
4. Daim Ntawv Thov & Kev Txwv
Q:E355 feem ntau siv nyob qhov twg?
A:
Heavy Engineering:Hydraulic thooj voos kheej kheej, crane jibs, conveyor rollers.
Kev thauj mus los:Chassis Cheebtsam, trailer qag (txias-kos).
Zam:
Temperatures >500℃(kev pheej hmoo ntawm decarburization).
Uncoated siv nyob rau hauv marine/acidic ib puag ncig.
5. Kev lees paub zoo & ntawv pov thawj
Q:Yuav ua li cas paub zoo rau E355 raj?
A:
Yuav tsum xeem:
Tensile (EN ISO 6892-1)|Hardness (EN ISO 6506-1)
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 III/IV).
