Saky steel Martensitic stainless hlau yog ib hom chromium stainless hlau uas tuav martensitic microstructure ntawm chav tsev kub, 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 heev dua li ntawm lwm yam stainless thiab kub resistant steels. Nws yog feem ntau siv rau hauv kev tsim cov kabmob, cov cuab yeej txiav, lossis cov pwm yas uas xav tau cov khoom hnyav thiab hnav tsis kam nyob rau hauv cov xwm txheej corrosive. American standard 440 series stainless hlau suav nrog: 440A, 440B, 440C, 440F. Cov ntsiab lus carbon ntawm 440A, 440B thiab 440C nce zuj zus. 440F (ASTM A582) yog hom dawb txiav hlau nrog S cov ntsiab lus ntxiv raws li 440C.
Qib sib npaug ntawm 440 SS
| Neeg Asmeskas | ASTM | 440a ua | 440b ua | 440c ua | 440f ua |
| UNS | S44002 | S44003 | S44004 | S44020 | |
| Nyiv | JIS | SUS 440A | SIB 440B | SUS 440 C | SUS 440 F |
| German | DIN | 1.4109 ib | 1.4122 ib | 1.4125 | / |
| Tuam Tshoj | GB | 7 cr17 | 8 cr17 | 11 Cr17 9c18 hmo | Y11Cr17 |
Tshuaj muaj pes tsawg leeg ntawm 440 SS
| Qib | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 440a ua | 0.6-0.75 Nws | ≤ 1.00 | ≤ 1.00 | ≤ 0.04 | ≤ 0.03 | 16.0-18.0 Nws | ≤ 0.75 | (≤0.5) | (≤0.5) |
| 440b ua | 0.75-0.95 Nws | ≤ 1.00 | ≤ 1.00 | ≤ 0.04 | ≤ 0.03 | 16.0-18.0 Nws | ≤ 0.75 | (≤0.5) | (≤0.5) |
| 440c ua | 0.95-1.2 Nws | ≤ 1.00 | ≤ 1.00 | ≤ 0.04 | ≤ 0.03 | 16.0-18.0 Nws | ≤ 0.75 | (≤0.5) | (≤0.5) |
| 440f ua | 0.95-1.2 Nws | ≤ 1.00 | ≤1.25 | ≤ 0.06 | ≥0.15 | 16.0-18.0 Nws | / | (≤0.6) | (≤0.5) |
Nco tseg: cov txiaj ntsig hauv cov kab ke raug tso cai thiab tsis tas yuav tsum tau ua.
Hardness ntawm 440 SS
| Qib | Hardness, Annealing (HB) | Kev kho cua sov (HRC) |
| 440a ua | ≤255 | ≥54 |
| 440b ua | ≤255 | ≥56 |
| 440c ua | ≤ 269 | ≥58 |
| 440f ua | ≤ 269 | ≥58 |
Zoo ib yam li cov hlau zoo tib yam, Saky steel's 440 series Martensite stainless hlau muaj cov yam ntxwv ntawm hardening los ntawm quenching, thiab tuaj yeem tau txais ntau yam khoom siv los ntawm kev kho cua sov sib txawv. Feem ntau, 440A muaj kev ua tau zoo ntawm kev ua tau zoo thiab kev ua haujlwm siab, thiab nws cov tawv tawv yog siab dua li ntawm 440B thiab 440C. 440B muaj zog dua thiab toughness dua 440A thiab 440C rau cov cuab yeej txiav, ntsuas cov cuab yeej, bearings thiab li qub. Lub 440C muaj qhov hardness siab tshaj plaws ntawm tag nrho cov hlau tsis muaj steel thiab kub resistant steel rau cov cuab yeej zoo txiav, nozzles thiab bearings. 440F yog cov hlau txiav dawb thiab feem ntau yog siv hauv tshuab dhos tsis siv neeg.
Post lub sij hawm: Jul-07-2020