Kala saar inta u dhaxaysa 420 420J1 iyo 420J2 sifooyinka waxqabadka birta aan fiicnayn:
Farqiga ugu weyn ee u dhexeeya birta 420J1 iyo 420J2
420J1 waxay leedahay heer go'an oo ah caabbinta xirashada iyo iska caabinta daxalka, adkaanta sare, iyo qiimihiisu waa kuwa hoose ee kubadaha birta ah. Waxay ku habboon tahay jawiga shaqada ee u baahan birta aan caadiga ahayn ee caadiga ah.
420J2 suunka birta ah ee birta ah waa astaan bir ah oo la soo saaray si waafaqsan heerarka ASTM ee Maraykanka; Heerka Jabbaan SUS420J2, heer qaran oo cusub 30Cr13, heer qaran oo duug ah 3Cr13, koodhka dhijitaalka ah S42030, heerka Yurub 1.4028.
420J1 birta aan lahayn: Ka dib marka la demiyo, engegnaanta ayaa sareysa, caabbinta daxalka waa mid wanaagsan (magnetic). Ka dib marka la demiyo, 420J2 birta aan lahayn ayaa ka adag 420J1 birta (magnetic).
Guud ahaan, heerkulka deminta ee 420J1 waa 980 ~ 1050 ℃. Adag ee 980 ℃ kululaynta saliidda ayaa si aad ah uga hooseeya 1050 ℃ kululaynta saliidda. Adayga ka dib 980 ℃ deminta saliidda waa HRC45-50, iyo engegnaanta ka dib 1050 ℃ deminta saliidda waa 2HRC sare. Si kastaba ha ahaatee, qaab-dhismeedka yar-yar ee la helay ka dib markii la demiyo 1050 ℃ waa mid aan fiicneyn oo jilicsan. Waxaa lagu talinayaa in la isticmaalo 1000 ℃ kululaynta iyo deminta si aad u hesho qaab-dhismeed wanaagsan iyo adkaanta.
Birta Aan-Aamiga ahayn 420 / 420J1 / 420J2 Xaashiyaha & Taarikada Darajooyinka u dhigma:
| HEERKA | JIS | SHAQADA NR. | BS | AFNOR | SIS | UNS | AISI |
| SS 420 | SUS 420 | 1.4021 | 420S29 | - | 2303 | S42000 | 420 |
| SS 420J1 | SUS 420J1 | 1.4021 | 420S29 | Z20C13 | 2303 | S42010 | 420L |
| SS 420J2 | SUS 420J2 | 1.4028 | 420S37 | Z20C13 | 2304 | S42010 | 420M |
SS420 / 420J1/ 420J2 Xaashiyaha, Taarikada Waxyaallaha Kiimikada ah (birta saky):
| Darajo | C | Mn | Si | P | S | Cr | Ni | Mo |
| SUS 420 | 0.15 max | 1.0 max | 1.0 max | 0.040 max | 0.030 max | 12.0-14.0 | - | - |
| SUS 420J1 | 0.16-0.25 | 1.0 max | 1.0 max | 0.040 max | 0.030 max | 12.0-14.0 | - | - |
| SUS 420J2 | 0.26-0.40 | 1.0 max | 1.0 max | 0.040 max | 0.030 max | 12.0-14.0 | - | - |
SS 420 420J1 420J2 Xaashiyaha, Taarikada Qalabka makaanikada (birta saky):
| Darajo | Xoogga ugu badnaan | Xoogga Wax-soo-saarka (0.2% ka-baxsan) ugu badnaan | Kordhinta (2 in.) |
| 420 | MPa - 650 | MPa - 450 | 10% |
| 420J1 | MPa - 640 | MPa - 440 | 20% |
| 420J2 | MPa - 740 | MPa - 540 | 12% |
Adkeysiga 420 bir taxane ah ka dib daaweynta kulaylku waa qiyaastii HRC52 ~ 55, iyo waxqabadka dhinacyo kala duwan sida caabbinta waxyeelladu maaha mid aad u fiican. Sababtoo ah way fududahay in la gooyo oo la nadiifiyo, waxay ku habboon tahay soo saarista mindiyaha. 420 birta aan dahsoon waxaa sidoo kale loo yaqaan "darajada goynta" birta martensitic. 420 bir taxane ah ayaa iska caabin ah miridhku heer sare ah ay sabab u tahay content carbon hoose (content kaarboon: 0.16 ~ 0.25), sidaas darteed waa bir ku habboon wax soo saarka ee qalabka quusidda.
Waqtiga boostada: Jul-07-2020