Nā Koina Hoʻohui Kemika，%，
C: ≤0.30
Mn: 0.29-1.06
P: ≤0.025
S: ≤0.025
Si: ≥0.10
Ni: ≤0.40
Cr: ≤0.30
Cu: ≤0.40
V: ≤0.08
Nb: ≤0.02
Mo: ≤0.12
* Hiki ke hoʻonui ʻia ka ʻike manganese e 0.05% no kēlā me kēia 0.01% ka emi ʻana o ka maʻi kalapona a hiki i ka 1.35%.
** Hiki ke hoʻonui ʻia ka ʻike Niobium, e pili ana i ka ʻaelike, a hiki i ka 0.05% no ka hoʻoheheʻe ʻana a me 0.06% no ka nānā ʻana i ka huahana.
ʻO nā pono hoʻomaʻamaʻa wela:
1. Hana maʻamau ma luna o 815°C.
2. Normalize ma luna o 815 ° C, a laila wela.
3. Hana ʻia ka wela ma waena o 845 a me 945°C, a laila hoʻomoe ʻia i loko o ka umu ma luna o 845°C (no nā paipu seamless wale nō).
4. Hana ʻia i ka mīkini a hoʻoluliluli ʻia e like me ka helu 3 ma luna.
5. Hoʻopaʻa ʻia a laila wela ma luna o 815°C.
Nā koi hana mīkini:
Ka ikaika hana: ≥240Mpa
Ka ikaika tensile: ≥415Mpa
Elongation:
| Laʻana | A333 GR.6 | |
| Kū pololei | Kūʻē | |
| Waiwai liʻiliʻi o ka pōʻai maʻamauhiʻohiʻona a i ʻole he mea hoʻohālike liʻiliʻi me ka mamao makaʻala o 4D | 22 | 12 |
| Nā hōʻailona ʻāʻī me ka mānoanoa pā o 5/16 in. (7.94 mm) a ʻoi aku ka nui, a ua hoʻāʻo ʻia nā ʻano mea liʻiliʻi a pau.ʻāpana kea piha ma 2 iniha (50 mm)hoailona | 30 | 16.5 |
| Nā mea hoʻohālike ʻāʻī a hiki i ka 5/16 iniha (7.94 mm) ka mānoanoa o ka paia ma 2 iniha (50 mm) makaʻala ʻana (ka laula hōʻike 1/2 in., 12.7 mm) | A | A |
A 'ae i ka ho'ēmi 'ana i ka elongation longitudinal he 1.5% a me ka ho'ēmi 'ana i ka elongation transverse no kēlā me kēia 1/32 in. (0.79 mm) o ka mānoanoa o ka pā a hiki i ka 5/16 in. (7.94 mm) mai nā helu elongation i helu 'ia ma luna.
Ho'āʻo Impact
Ka Mahana Hoao: -45°C
Ke hoʻohana ʻia nā hiʻohiʻona liʻiliʻi Charpy hopena a ʻoi aku ka laulā o ka specimen notch ma lalo o 80% o ka mānoanoa maoli o ka mea, pono e hoʻohana ʻia kahi haʻahaʻa haʻahaʻa haʻahaʻa e like me ka helu ʻana ma ka Papa 6 o ka kikoʻī ASTM A333.
| Laʻana, mm | ʻO ka awelika liʻiliʻi o ʻekolu mau laʻana | Waiwai liʻiliʻi o one of na laana ekolu |
| 10 × 10 | 18 | 14 |
| 10 × 7.5 | 14 | 11 |
| 10 × 6.67 | 12 | 9 |
| 10 × 5 | 9 | 7 |
| 10 × 3.33 | 7 | 4 |
| 10 × 2.5 | 5 | 4 |
Pono e ho'āʻo ʻia nā paipu kila i ka hydrostatically a i ʻole ka luku ʻole ʻia (eddy current a i ʻole ultrasonic) ma ke kumu lālā.
ʻO ka hoʻomanawanui o ke anawaena o waho o ka paipu kila:
| Ka anawaena o waho, mm | hoʻomanawanui maikaʻi,mm | hoʻomanawanui ʻino,mm |
| 10.3-48.3 | 0.4 | 0.4 |
| 48.3＜D≤114.3 | 0.8 | 0.8 |
| 114.3＜D≤219.10 | 1.6 | 0.8 |
| 219.1＜D≤457.2 | 2.4 | 0.8 |
| 457.2＜D≤660 | 3.2 | 0.8 |
| 660＜D≤864 | 4.0 | 0.8 |
| 864＜D≤1219 | 4.8 | 0.8 |
Ka mānoanoa o ka pā o ka paipu kila:
ʻAʻole e emi iho kekahi kiko ma lalo o 12.5% o ka mānoanoa o ka pā.Inā kauoha ʻia ka mānoanoa liʻiliʻi o ka pā, ʻaʻohe kiko e emi iho ma mua o ka mānoanoa pā i makemake ʻia.
Ka manawa hoʻouna: Feb-22-2024