ASTM A203 Qib D thiab E yog ob qho tib si nickel alloy steels rau cov hlab ntsha siab, sib txawv hauv lawv cov ntsiab lus nickel, uas cuam tshuam rau cov khoom siv kho tshuab, tshwj xeeb tshaj yog qis - kub toughness; Qib D feem ntau muaj 2.25% Ni, thaum Qib E feem ntau suav hais tias yog 3.5% Nickel (3.5-Ni) steel, muab cov tawv tawv zoo dua rau cov kev pabcuam txias heev, txawm hais tias cov kev qhia tshwj xeeb tuaj yeem sib txawv me ntsis los ntawm cov chaw tsim khoom thiab kho dua tshiab, nrog npib tsib xee ua lub zog ferrite muaj zog.
ASTM A203 Qib D Cov Khoom Siv Tshuaj thiab Cov Khoom Siv Hluav Taws Xob
|
Qib |
Chemical Composition (%) |
||||
|
C |
Mn Ntau dua lossis sib npaug |
Si |
P |
S |
|
|
A203 Qib D (A 203 TSI) |
0.17 |
0.7-0.8 |
0.13-0.45 |
0.035 |
0.035 |
|
Qib |
Mechanical Property |
|
|||
|
Tensile zog (MPa) |
Yield zog (MPa) |
% Elongation hauv 2 nti (50mm) min |
Impacting Test Temperature (degree) |
|
|
|
A203 Qib D (A 203 TSI) |
450 |
255 |
19 |
-20,40,-60 |
|
ASTM A203 Qib E Chemical Composition thiab Mechanical Property
|
Qib |
Chemical Composition (%) |
||||
|
C |
Mn Ntau dua lossis sib npaug |
Si |
P |
S |
|
|
A203 Qib E (A203GRE) |
0.17 |
0.7-0.8 |
0.13-0.45 |
0.035 |
0.035 |
|
Qib |
Mechanical Property |
|
|||
|
Tensile zog (MPa) |
Yield zog (MPa) |
% Elongation hauv 2 nti (50mm) min |
Impacting Test Temperature (degree) |
|
|
|
A203 Qib E (A203GRE) |
485 |
275 |
21 |
-20,40,-60 |
|
Qhov tseem ceeb sib txawv Summary:
Cov ntsiab lus Nickel: Qib D feem ntau nyob ib ncig ntawm 2.25% Ni; Qib E feem ntau siab dua, nyob ib ncig ntawm 3.5% Ni.
Daim ntawv thov: Ob leeg rau boilers / siab hlab ntsha, tab sis Qib E ntau dua nickel muab superior qis -kub ductility thiab cuam tshuam.
Khoom: Nickel nce lub zog thiab tawv, tshwj xeeb tshaj yog nyob rau hauv qhov chaw txias, ua Qib E zoo tagnrho rau kev pabcuam cryogenic lossis txias heev.
Xav paub ntau ntxiv:
ASTM A203 Standard: Cov qauv no suav nrog npib tsib xee- alloy steel daim hlau rau cov hlab ntsha siab, qhov twg cov ntsiab lus nickel dictates qib.
Qib D: Feem ntau hu ua 2.25% Ni steel, nws yog lub tshuab ua haujlwm rau kev siv lub nkoj dav dav uas xav tau lub zog zoo thiab weldability.
Qib E: Kuj tseem hu ua 3.5% Ni steel, nws tau tsim tshwj xeeb rau cov ntawv thov uas xav tau kev ua tau zoo ntawm sub- xoom kub, txhim kho toughness.
Thaum xaiv qhov twg:
Xaiv Qib D rau cov hlab ntsha siab uas nruab nrab qis - qhov ua haujlwm kub txaus txaus.
Xaiv Qib E thaum cov kev pab cuam cuam tshuam nrog qhov kub thiab txias, xav tau kev txhim kho ductility thiab cuam tshuam cov tawv nqaij, ua rau nws zoo heev rau cov roj liquefied lossis cryogenic cia.
