ASTM H21 / DIN EN X30WCrV 9-3 1.2581 Khoom Hlau Bar / Qws
Tungsten kub-ua haujlwm hlau yog ntau hom, uas yog, H21 txog H26 hom. Cov hlau no muaj cov yam ntxwv zoo ib yam li cov hlau ceev ceev. Lub ntsiab alloying hauv tungsten kub-ua haujlwm hlau muaj xws li tungsten, chromium, carbon, thiab vanadium. Lawv tiv taus qhov tsis sib haum xeeb thaum lawv muaj huab cua tawv, thiab muaj qhov kub thiab txias dua thaum piv rau chromium kub-ua haujlwm steels. Kev tawg ntawm tungsten kub-ua haujlwm steels tuaj yeem txo yog tias lawv tau preheated rau qhov kub thiab txias ua ntej siv. Thermal shock resistance thiab toughness ntawm cov hlau no tuaj yeem txhim kho los ntawm kev txo cov ntsiab lus carbon.
AISI H21 cov cuab yeej hlau yog cov khoom siv kub ua haujlwm zoo, Nws yog cov cuab yeej zoo siab carbon hlau. Roj Quenched & Tempered Hardenss yog 28-34 HRc. AISI H21 steel Annealing xa khoom hardens tsawg dua 250HB.
Qib Hlau | 1.2581 | Daim ntawv thov | Tool steel, Pwm Steel |
Cov duab | Round bar | Txuj | AISI, DIN, JIS, GB |
Dimension | ∅ 20 - 1000 hli | Nto | Dub, Peeled, Tig, Grinded |
Cov txheej txheem | Kub dov, Forged | Ultrasonic Test | 100 feem pua UT Passed |
Sib npaug
AISI / SAE | DIN / W. Nr | JIS | GB |
H21/T20821 | 1.2581 | SKD 5 | 3 cr2w8v |
Chemical Composition (%)
C | Si | Mn | P | S | Cr | V | W |
0.26 0.36 | 0.15 0.50 | 0.15 0.40 | Tsawg dua los yog sib npaug 0.030 | Tsawg dua los yog sib npaug 0.030 | 3.00 3.75 | 0.30 0.60 | 8.50 10.00 |
Neeg kho tshuabCov khoom
| Elastic modulus (@399 degree / 750 degree F, hardened rau 62 HRC) | Elastic modulus (hardened rau 62 HRC) | Yield (0.2 feem pua, hardened rau 55 HRC) | Yield (0.2 feem pua, hardened rau 60 HRC) | Yield (0.2 feem pua, hardened rau 62 HRC) | Yield (0.2 feem pua, hardened rau 50 HRC) |
| GPa | GPa | Mpa | Mpa | Mpa | MPa |
| 172 | 193 | 1800 | 2150 | 2200 | 1350 |
Kev Xa Khoom
- EAF plus (ESR) or EAF plus LF plus VD plus (ESR)
- Kub dov los yog Forged, Annealed
-Hardness Tsawg dua lossis sib npaug rau 235HB
-Surface Finish: Dub, Rough Machined, Peeled, Tig los yog raws li qhov yuav tsum tau ua
-UT 100% dhau
- Txiav kev pab cuam
- Kev tshuaj xyuas thib peb tau txais (SGS, BV thiab lwm yam)
Daim ntawv thov
H21 Kub ua hauj lwm steels yog tsim rau kev tsim cov duab complex, cuam tshuam load, ua hauj lwm kub tsis dhau siab, pwm cov khoom yog tsim rau forging xovxwm pwm, concave thiab convex tuag, tuag casting, kub hlau txiav riam, thiab lwm yam. ntau lawm nrog aluminium alloy tuag-casting pwm.
Machinability-Cov ntsiab lus tungsten nyob rau hauv H21 steels ua rau nws nyuaj rau tshuab piv rau cov dej hardening tsawg alloy steels nrog 100 feem pua machinability thaum H21 yog nyob rau ntawm 55 feem pua.
Forming-H21 steels tuaj yeem tsim los ntawm cov txheej txheem ua qauv.
Vuam-H21 steels tuaj yeem welded.
Kev kho cua sov-Cov txheej txheem no yuav tsum tau H21 steels yuav tsum tau preheated rau 816 degree (1500 degree F) thiab ces rhuab sai sai mus rau 1177 degree (2150 degree F). Tom qab ntawd cov hlau no yuav tsum tau tuav ntawm qhov kub thiab txias li 2 mus rau 5 feeb thiab thaum kawg cua txias lossis roj quenched.
Forging-Forging ntawm H21 steels tuaj yeem ua tau ntawm 1150 degree (2100 degree F) mus rau 927 degree (1700 degree F) tab sis tsis qis dua 899 degree (1650 degree F).
Cold Work-H21 steels tuaj yeem ua haujlwm txias los ntawm kev siv cov txheej txheem.
Annealing-Annealing yuav tsum tau ua nyob rau ntawm 885 degree (1625 degree F) ua raws li los ntawm qeeb cua sov cua sov ntawm qhov kub tsawg tshaj li 4 degree (40 degree F) ib teev.
Tempering-Tempering ntawm H21 steels yog ua nyob rau ntawm 593 txog 677 degree (1100 txog 1250 degree F) kom paub txog Rockwell C hardness ntawm 54 txog 36. Cov txheej txheem ob chav tempering yog pom zoo thiab cov khoom yuav tsum tau khaws cia ntawm qhov kub thiab txias rau ib teev.
Cim npe nrov: astm h21 / din en x30wcrv 9-3 1.2581 tungsten cuab tam steel bar, Tuam Tshoj, tuam ntxhab, lwm tus muag khoom, Hoobkas