ASTMA335 choksiz po'lat quvur ASTMA335M qotishma po'lat quvur
"Yuqori haroratda foydalanish uchun ferritli qotishma po'latdan choksiz po'lat quvurlar uchun spetsifikatsiya"
Mahsulot materiallari/navbalari quyidagilardan iborat: P1, P2, P5, P5B., P5C, P9, P11, P12, P21, P22, P23, P36, P91 (1-toifa, 2-toifa). P92
Mahsulot xususiyatlari: 21,3 mm ~ 762 mm devor qalinligi 2. 0 mm ~ 130 mm
Ishlab chiqarish usuli: issiq prokat, etkazib berish holatida issiqlik bilan ishlov berish
ASTM A335 po'lat quvurlari kimyoviy tarkibi:
| Material | C | Si | Mn | P | S | Mo | Cr |
|---|---|---|---|---|---|---|---|
| % | % | % | % | Maks | % | Maks | |
| A335 P1 darajasi | 0.10---0.20 | 0.10---0.50 | 0.30---0.80 | 0.025 | 0.025 | 0.440.65 | |
| A335 P5 darajasi | Maks 0.15 | Maks 0.50 | 0.30---0.60 | 0.025 | 0.025 | 0.450.65 | 4.006.00 |
| A335 P11 sinf | 0.05---0.15 | 0.5---1.0 | 0.30---0.60 | 0.025 | 0.025 | 0.450.65 | 1.001.50 |
| A335 P12 darajasi | 0.05---0.15 | Maks 0.50 | 0.30---0.61 | 0.025 | 0.025 | 0.450.65 | 0.801.25 |
| A335 P22 darajasi | 0.05---0.15 | Maks 0.50 | 0.30---0.60 | 0.025 | 0.025 | 0.871.13 | 1.902.60 |
ASTM A335 po'lat quvurlari mexanik xususiyatlari:
| Material | Kuchlanish N/mm2 | Chidamlilik min N/mm2 | Daromad %min |
|---|---|---|---|
| A335 P1 darajasi | Min 380 | 205 | 30 |
| A335 P5 darajasi | Min 415 | 205 | 30 |
| A335 P11 sinf | Min 415 | 205 | 30 |
| A335 P12 darajasi | Min 415 | 205 | 30 |
| A335 P22 darajasi | Min 415 | 205 | 30 |
ASTM A335 po'lat quvurlari issiqlik bilan ishlov berish talablari
| ASTM A335 darajasi | Issiqlik bilan ishlov berish turi | Normalizatsiya harorat diapazoni F [C] | Subkritik tavlanish yoki temperaturalash Harorat diapazoni F [C] |
|---|---|---|---|
| P5 (b,c) | To'liq yoki izotermik tav | ||
| Normallashtirish va temperatsiya | - | 1250 [675] | |
| Subkritik Anneal (faqat P5c) | - | 1325 - 1375 [715 - 745] | |
| P9 | To'liq yoki izotermik tav | ||
| Normallashtirish va temperatsiya | - | 1250 [675] | |
| P11 | To'liq yoki izotermik tav | ||
| Normallashtirish va temperatsiya | - | 1200 [650] | |
| P22 | To'liq yoki izotermik tav | ||
| Normallashtirish va temperatsiya | - | 1250 [675] | |
| P91 | Normallashtirish va temperatsiya | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
| Qunch va Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] |
