GB / T20409 20G 20MnG 25MnG SA210 SA213 Tabung Baja Presisi Tabung Baja Mulus
Rincian produk
Alloy Steel Seamless Pipe
,persegi panjang pipa baja
Nama produk:TORICH GB/T20409 20G 20MnG 25MnG SA210 SA213 Tabung Baja Tanpa Jahit Boiler Tekanan Tinggi Berbilang
Standar:GB/T20409
OD: 3-420mm
WT: 0,5-50mm
Panjang: 8-12m atausesuai dengan aplikasi dan produksi pelanggan yang sebenarnya.
Aplikasi:Boiler Tekanan Tinggi
Kelas baja:20G 20MnG 25MnG SA210 SA213
Teknologi:Digulung panas, digulung dingin, ditarik dingin
Karakteristik:
Konsentrisitas yang baik
Kualitas permukaan yang baik
Toleransi OD dan ID yang baik
Keakuratan Tinggi
Kualitas stabil
Kerontokan yang halus
TORICH Jaminan Kualitas
Tabel6 Sifat mekanik longitudinal dari tabung sekrup internal pada suhu kamar
| Nomor | Kelas | kekuatan tarik
MPa ((N/ | Kekuatan hasil yang lebih rendah/MPa) | Perpanjangan A/% | Energi dampak
|
| Tidak kurang dari | |||||
| 1 | 20G | 410 ~ 550 | 245 | 24 | 35 |
| 2 | 20MnG | ≥415 | 240 | 22 | 35 |
| 3 | 25Mng | ≥ 485 | 275 | 20 | 35 |
| 4 | 12CrMoG | 410 ~ 560 | 205 | 21 | 35 |
| 5 | 15CrMoG | 440 ~ 640 | 235 | 21 | 35 |
Tabel 4 Kelas dan komposisi kimia baja
| Nomor | Merek | komposisi kimia ((fraksi massa) / % | ||||||
| C | Mn | Ya. | Cr | Mo | S | P | ||
| 1 | 20G | 0.17 ~ 0.23 | 0.35 ~ 0.65 | 0.17 ~ 0.37 | ... | ... | ≤ 0.020 | ≤ 0.025 |
| 2 | 20MnG | 0.17 ~ 0.23 | 0.70 ~ 1.00 | 0.17 ~ 0.37 | ... | ... | ≤ 0.020 | ≤ 0.025 |
| 3 | 25Mng | 0.22 ~ 0.29 | 0.7 ~ 1.00 | 0.17 ~ 0.37 | ... | ... | ≤ 0.020 | ≤ 0.025 |
| 4 | 12CrMoG | 0.08 ~ 0.15 | 0.40 ~ 0.70 | 0.17 ~ 0.37 | 0.40 ~ 0.70 | 0.40 ~ 0.55 | ≤ 0.020 | ≤ 0.025 |
| 5 | 15CrMoG | 0.12 ~ 0.18 | 0.40 ~ 0.70 | 0.17 ~ 0.37 | 0.80 ~ 1.10 | 0.40 ~ 0.55 | ≤ 0.020 | ≤ 0.025 |
| Catatan1: Kandungan unsur residual dari 20G,20MnG,25MnG harus memenuhi: Cu≤0,20%,Cr≤0,25%,Ni≤0,25%,V≤0,08%,Mo≤0,15%;Sisa unsur dari merek lain harus memenuhi: Cu≤0,20%,Ni≤0,30%. Catatan2:Aluminium larut dalam asam dalam baja 20G seharusnya tidak lebih dari 0,010%. Catatan 3: Kandungan nitrogen baja yang dihasilkan oleh konverter oksigen ditambah pemurnian tungku tidak boleh lebih dari 0,008%. | ||||||||
Ukuran tabung sekrup internal dan penyimpangan parameter benang yang diizinkan
| Kode | Proyek | Perbedaan jenis gigi yang diizinkan | Perbedaan jenis gigi |
| A | O.D≤38,1mm 38.1mm 50.8mm≤O.D≤63.5mm O.D≥63,5mm | ± 0,15 mm ±0,20mm ± 0,25 mm ± 0,30mm | ... |
| B | O.D≤38,1mm 38.1mm 50.8mm≤O.D≤63.5mm O.D≥63,5mm | ... | ± 0,15 mm ±0,20mm ± 0,25 mm ± 0,30mm |
| C | ID dari akar benang sekrup: O.D-(1.11×Minimal W.T×2) O.D≤38,1mm 38.1mm 50.8mm≤O.D≤63.5mm O.D≥63,5mm | ± 0,15 mm ±0,20mm ± 0,25 mm ± 0,30mm | ± 0,15 mm ±0,20mm ± 0,25 mm ± 0,30mm |
| E | ID minimal | Penyimpangan negatif ke nol | Penyimpangan negatif ke nol |
| F | W.T Minimal | +22% 0 | +22% 0 |
| G | Ujung benang | ... | ... |
| Aku | Lebar atas benang | ... | ... |
| Tinggi benang: O.D≤38,1mm 38.1mm 50.8mm≤O.D≤63.5mm O.D≥63,5mm | ± 0,3 mm | ± 0,18mm ±0,20mm ± 0,23 mm ± 0,28 mm |
| K | Sudut sisi benang. | ± 15° | ± 15° |
| O | jari-jari sudut bulat di akar benang | ... | ... |
| M | Pitch benang | ± 3,2 mm | ± 3,2 mm |
| N | Tulang benang | ± 3,2 mm × ujung benang | ± 3,2 mm × ujung benang |
| Sudut Heliks | Peringkat | Peringkat |
| T | Lebar atas benang (aksial) | ± 1,3 mm | ± 1,3 mm |
| U | Lebar alur atas benang (aksial) | ... | ... |
| |||
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