Saky hlau Martensitic stainless hlau yog ib hom chromium stainless hlau uas tswj martensitic microstructure ntawm chav tsev kub, uas nws cov khoom tuaj yeem hloov kho los ntawm kev kho cua sov (quenching thiab tempering). Feem ntau hais lus, nws yog ib hom hardenable stainless hlau. Tom qab quenching, tempering thiab annealing txheej txheem, Lub hardness ntawm 440 stainless hlau tau zoo dua li ntawm lwm yam stainless hlau thiab cua sov resistant steels. Nws yog feem ntau siv nyob rau hauv lub chaw ua khoom ntawm kev coj tus kheej, txiav cov cuab yeej, lossis yas pwm uas xav tau siab loads thiab hnav tsis kam nyob rau hauv corrosive tej yam kev mob. American standard 440 series stainless hlau suav nrog: 440A, 440B, 440C, 440F. Cov pa roj carbon ntsiab lus ntawm 440A, 440B thiab 440C nce successively. 440F (ASTM A582) yog ib hom ntawm dawb txiav hlau nrog S cov ntsiab lus ntxiv rau lub hauv paus ntawm 440C.
Cov Qib Sib Npaug Ntawm 440 SS
| Neeg Asmeskas | ASTM | 440A | 440B | 440C | 440F |
| UNS | S44002 | S44003 | S44004 | S44020 | |
| Nyiv | JIS | SUS 440A | SUS 440B | SUS 440C | SUS 440F |
| German | DIN | 1.4109 | 1.4122 | 1.4125 | / |
| Tuam Tshoj | GB | 7Cr17 | 8Cr17 | 11Cr17 9Cr18Mo | Y11Cr17 |
Cov Tshuaj Lom Zem ntawm 440 SS
| Cov Qib | 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) |
Lus Cim: cov nqi hauv cov kab kos yog tso cai thiab tsis yog yuav tsum tau ua.
Qhov nyuaj ntawm 440 SS
| Cov Qib | Kev Nyuaj Siab, Kev Ntxub Ntxaug (HB) | Kev kho cua sov (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
Zoo li cov hlau sib xyaw ua ke, Saky steel's 440 series Martensite stainless hlau muaj cov yam ntxwv ntawm kev tawv los ntawm kev quenching, thiab tuaj yeem tau txais ntau yam khoom siv kho tshuab los ntawm kev kho cua sov sib txawv. Feem ntau, 440A muaj kev ua tau zoo heev thiab kev tawv siab, thiab nws cov tawv yog siab dua li ntawm 440B thiab 440C. 440B muaj kev tawv thiab tawv dua li 440A thiab 440C rau cov cuab yeej txiav, cov cuab yeej ntsuas, cov kabmob thiab cov li qub. Lub 440C muaj qhov nyuaj tshaj plaws ntawm txhua cov hlau tsis xeb thiab cov hlau tiv taus cua sov rau cov cuab yeej txiav zoo, cov nozzles thiab cov kabmob. 440F yog cov hlau txiav dawb thiab feem ntau siv rau hauv cov tshuab dhos tsis siv neeg.
Lub sijhawm tshaj tawm: Lub Xya Hli-07-2020