Bakin ƙarfe 422, X20CrMoWV12-1, 1.4935, SUH 616, UNS 42200, ASTM A437 Grade B4B martensitic creep resistant bakin ƙarfe ƙarin abubuwa masu haɗa ƙarfe masu nauyi waɗanda ke ba shi ƙarfi mai kyau da juriya ga zafi a yanayin zafi mafi girma har zuwa 1200 F, ƙarfe Chrome-nickel tare da tsarin austenitic tare da carbides. Ƙarin ƙarfe na molybdenum, vanadium da tungsten suna ƙara yawan ƙarfeZafin narkewa. Kamar bakin ƙarfe 410, wannan matakin yana da ikon yin maganin zafi zuwa matakai daban-daban na ƙarfi. Saboda juriyar zafin, ana amfani da wannan ƙarfe sau da yawa a cikinKasuwar samar da wutar lantarki a matsayin sassan injin tururin tururi da iskar gas ko wasu sassan zafi mai zafi daban-daban, galibi ruwan turbin da manne. B50A125E sanannen ƙarfe ne mai jure wa Creep wanda ke jure wa turbin wanda ke da juriya ga turbin.an taurare kuma an daidaita shi don ba da aminci mai mahimmanci a cikin aikace-aikacen zafi mai yawa tare da matsakaicin zafin aiki na sama na yau da kullun na 580℃., 422 Bakin Karfe, UNS S42200, B50A, AISI 616,AMS 5655, ASTM A 565 GRD 616, MIL S 861, B50A125, B50A951A1, BS 970 442S19, EN61 Daga Saky Steel.
Sinadaran da aka Haɗa 1.4935, SUH 616,UNS 42200Sandunan Bakin Karfe:
| Maki | C | Si | Mn | P | S | Cr | Mo | W | V | Cu | Ni |
| EN 1.4935, X20CrMoWV12-1 | 0.17-0.24 | 0.1-0.5 | 0.3-0.8 | <0.025 | <0.015 | 11.0-12.5 | 0.8-1.2 | 0.4-0.6 | 0.25-0.35 | 0.3-0.8 | |
| JIS SUH616 | 0.20-0.25 | <0.5 | 0.5-1.0 | <0.04 | <0.03 | 11.0-13.0 | 0.75-1.25 | 0.75-1.25 | 0.2-0.3 | <0.3 | 0.5-1.0 |
| ASTM AISI 422 / AISI 616 – S42200 | 0.20-0.25 | <0.75 | <1.0 | <0.04 | <0.03 | 11.0-12.5 | 0.75-1.25 | 0.75-1.25 | 0.15-0.30 | <0.5 | 0.5-1.0 |
Nunin Samfura Na 1.4935, SUH 616, Bakin Karfe Na UNS 42200:
Lokacin Saƙo: Agusta-29-2022