RINA A thiab RINA B yog cov qauv siv lub zog shipbuilding steel daim hlau uas tau lees paub los ntawm Italian faib pawg neeg RINA (Registro Italiano Navale). Lawv feem ntau yog siv rau cov khoom siv dav dav hauv nkoj hulls thiab marine kev tsim kho uas muaj kev cuam tshuam hnyav heev tsis yog qhov yuav tsum tau ua. Ob qib sib faib qhov tsawg kawg nkaus qhov muaj zog ntawm 235 MPa, tab sis lawv qhov sib txawv tseem ceeb nyob rau hauv cov theem ntawm qhov tsis zoo ntawm qhov kub thiab txias.
Qhov txawv tseem ceeb
Qhov sib txawv tseem ceeb yog qhov yuav tsum tau ua Charpy V-qhov ntsuas qhov ntsuas qhov yuav tsum tau ua.
RINA A Qib: Tsis muaj qhov yuav tsum tau ua kom muaj kev cuam tshuam. Nws yog qhov tsim nyog rau cov txheej txheem thib ob thiab tsis yog - qhov chaw tseem ceeb uas qhov kev pheej hmoo ntawm kev tawg tawg yog tsawg tsawg hauv cov kev pabcuam ib txwm muaj.
RINA B Qib: Yuav tsum tau Charpy V- ntsuas qhov cuam tshuam ntawm chav tsev kub (feem ntau yog +20℃). Qhov no ua kom muaj qhov yooj yim ntawm qhov toughness, ua rau nws txhim khu kev qha ntau dua li Qib A rau cov qauv hull thawj thiab cov khoom tseem ceeb uas yuav muaj qee qhov dynamic lossis tsis sib xws.
RINA Ib txwm muaj zog Max Chemical Composition hauv Kub- dov
|
Element |
RINA A Max % |
Element |
RINA A Max % |
|
C |
0.21 |
Ni |
|
|
Mn |
2.5 * C MIN |
Mo |
|
|
Si |
0.50 |
Al |
|
|
S |
0.035 |
Nb |
|
|
P |
0.035 |
V |
|
|
Cu |
|
Ti |
|
|
Cr |
|
N |
|
RINA B Ib txwm muaj zog Max Chemical Composition hauv Kub- dov
|
Element |
RINA B Max % |
Element |
RINA B Max % |
|
C |
0.21 |
Ni |
|
|
Mn |
0.80 |
Mo |
|
|
Si |
0.35 |
Al |
|
|
S |
0.035 |
Nb |
|
|
P |
0.035 |
V |
|
|
Cu |
|
Ti |
|
|
Cr |
|
N |
|
RINA Ib yam khoom muaj zog hauv Kub- dov
|
Qib |
Thickness |
Yield zog |
Tensile zog |
Elongation |
Impact Zog |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
|
|
|
|
|
|
20 degree |
|
|
RINA A |
8-240 |
235 |
400-520 |
22 |
|
RINA B Cov cuab yeej muaj zog li qub hauv Kub- dov
|
Qib |
Thickness |
Yield zog |
Tensile zog |
Elongation |
Impact Zog |
|
(mm) |
MPa (min) |
MPa |
% (min) |
(KV J) (min) |
|
|
|
|
|
|
0 degree |
|
|
RINA B |
8-240 |
235 |
400-520 |
22 |
27J |
