Saky steel Martensitic stainless steel mangrupakeun jenis kromium stainless steel nu ngajaga microstructure martensitic dina suhu kamar, anu sipat bisa disaluyukeun ku perlakuan panas (quenching na tempering). Sacara umum, éta mangrupikeun jinis baja tahan karat. Saatos quenching, tempering sarta prosés annealing, The karasa tina 440 stainless steel geus greatly ningkat ti éta tina stainless steel sarta panas steels séjén. Biasana dianggo dina pembuatan bantalan, alat motong, atanapi kapang plastik anu peryogi beban anu luhur sareng tahan ngagem dina kaayaan korosif. standar Amérika 440 runtuyan stainless steel kaasup: 440A, 440B, 440C, 440F. Eusi karbon 440A, 440B sareng 440C ningkat berturut-turut. 440F (ASTM A582) mangrupikeun jinis baja motong gratis kalayan eusi S ditambah dina dasar 440C.
Sarua sasmita 440 SS
| Amérika | ASTM | 440A | 440B | 440C | 440F |
| UNS | S44002 | S44003 | S44004 | S44020 | |
| Basa Jepang | JIS | SUS 440A | SUS 440B | SUS 440C | SUS 440F |
| Jerman | DIN | 1.4109 | 1.4122 | 1.4125 | / |
| Cina | GB | 7Cr17 | 8Cr17 | 11Cr17 9Cr18Mo | Y11Cr17 |
Komposisi Kimia 440 SS
| Sasmita | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 440A | 0.6-0.75 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440B | 0.75-0.95 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440C | 0.95-1.2 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440F | 0.95-1.2 | ≤1.00 | ≤1.25 | ≤0.06 | ≥0.15 | 16.0-18.0 | / | (≤0.6) | (≤0.5) |
Catetan: nilai dina kurung diwenangkeun tur teu wajib.
Teu karasa 440 SS
| Sasmita | Teu karasa, Annealing (HB) | perlakuan panas (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
Sarupa jeung baja alloy biasa, Saky steel urang 440 runtuyan Martensite stainless steel boga ciri hardening ngaliwatan quenching, sarta bisa ménta rupa-rupa sipat mékanis ngaliwatan perlakuan panas béda. Sacara umum, 440A boga kinerja hardening alus teuing jeung karasa tinggi, sarta kateguhan na leuwih luhur batan 440B na 440C. 440B ngabogaan karasa jeung kateguhan luhur batan 440A jeung 440C pikeun alat motong, alat ukur, bantalan sareng klep. The 440C boga karasa pangluhurna sadaya stainless steel sarta panas baja tahan pikeun parabot motong kualitas luhur, nozzles sarta bantalan. 440F mangrupakeun baja motong bébas tur utamana dipaké dina lathes otomatis.
waktos pos: Jul-07-2020