A cikin ASTM A213, ban da buƙatun don kaddarorin ƙarfi da taurin, ana kuma buƙatar gwaje-gwaje masu zuwa: Gwajin Flattening da Gwajin Lanƙwasa.
ASTM A335 P22(ASME SA335 P22) sabis ne mai zafin jiki mara ƙarfi mara ƙarfi chromium-molybdenum gami da bututun ƙarfe, ana amfani da shi sosai a cikintukunyar jirgi, superheaters, da zafimasu musayar wuta.
Ya ƙunshi 1.90%zuwa 2.60% chromium da 0.87% zuwa 1.13% molybdenum, yana da kyakkyawan juriya na zafi, kuma ya dace da lankwasawa, flanging, ko ayyukan kafa irin wannan.
Lambar UNS: K21590.
ASTM A335 shine ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun bututun ƙarfe-karfe marasa ƙarfi waɗanda aka yi niyya don sabis na zafin jiki. Ana amfani da shi sosai a cikin tukunyar jirgi, superheaters, masu musayar zafi, da sauran aikace-aikacen da ke aiki a ƙarƙashin yanayin zafi da matsanancin yanayi. Baya ga Grade P22, sauran matakan gama gari sun haɗa daP5 (UNS K41545), P9 (UNS K90941), P11 (UNS K11597), kumaP91 (UNS P90901).
Mai ƙera da Sharadi
ASTM A335 P22 bututun ƙarfe za a yi su ta hanyar tsari mara kyau kuma za su kasance ko dai an gama zafi ko kuma zana sanyi tare da gamawa magani.
Bututun ƙarfe mara nauyisu ne bututu ba tare da walda ba, wanda ke ba da bututun ƙarfe na P22 tare da kwanciyar hankali mafi girma da aminci a cikin yanayin zafi mai zafi da matsa lamba.
Maganin zafi
P22 bututun ƙarfe za a sake mai da su kuma za a yi maganin zafi ta ko dai cikakken annealing, isothermal annealing, ko normalizing da tempering.
| Daraja | Nau'in maganin zafi | Subcritical Annealing ko Zazzabi |
| ASTM A335 P22 | cikakken ko isothermal anneal | - |
| normalize da fushi | 1250 ℉ [675 ℃] min |
Chromium (Cr) da molybdenum (Mo) sune mahimman abubuwan haɗakarwa a cikin karfe P22, haɓaka ƙarfin zafin jiki, juriya da iskar shaka, da dorewa. Ana nuna takamaiman abun da ke tattare da sinadaran a ƙasa:
| Daraja | Abun ciki, % | ||||||
| C | Mn | P | S | Si | Cr | Mo | |
| P22 | 0.05 ~ 0.15 | 0.30 ~ 0.60 | 0.025 max | 0.025 max | 0.50 max | 1.90 ~ 2.60 | 0.87 ~ 1.13 |
Gwajin kayan aikin injiniya na P22 za a gudanar da su daidai da buƙatun ASTM A999 masu dacewa.
Tensile Properties
| Daraja | ASTM A335 P22 | |
| Ƙarfin ɗaure, min | 60 ksi [415 MPa] | |
| Ƙarfin bayarwa, min | 30 ksi [205 MPa] | |
| Tsawaitawa cikin inci 2 ko 50 (ko 4D), min | Tsayi | Canza |
| Mahimmin ƙaƙƙarfan elongation na bango 5/16 a [8 mm] da sama da kauri, gwaje-gwajen tsiri, kuma ga duk ƙaramin girman da aka gwada a cikin cikakken sashe. | 30% | 20% |
| Lokacin da aka yi amfani da daidaitaccen zagaye na 2 a cikin ko 50 mm tsayin gage ko mafi girman girman samfurin da tsayin gage yayi daidai da 4D (sau 4 diamita) | 22% | 14% |
| Don gwaje-gwajen tsiri ana cirewa kowane 1/32 a cikin [0.8 mm] raguwa a kaurin bango ƙasa da inci 1/32. [8 mm] daga mafi ƙarancin ƙaranci na maki masu zuwa za a yi. | 1.50% | 1.00% |
Abubuwan Hardness
Matsayin ASTM A335 bai ƙayyade takamaiman buƙatun taurin bututun ƙarfe na P22 ba.
Sauran Abubuwan Gwaji
Haƙuri na Diamita
Don bututun da NPS [DN] ya umarta ko diamita na waje, bambancin diamita na waje ba zai wuce buƙatun da aka nuna a teburin da ke ƙasa ba:
| NPS [DN] Mai tsarawa | Bambance-bambancen da aka halatta | |
| in. | mm | |
| 1/8 zuwa 1 1/2 [6 zuwa 40], inch. | ± 1/64 [0.015] | ± 0.40 |
| Sama da 1 1/2 zuwa 4 [40 zuwa 100], inch. | ± 1/32 [0.031] | ± 0.79 |
| Sama da 4 zuwa 8 [100 zuwa 200], inci. | -1/32 - +1/16 [-0.031 - +0.062] | -0.79 - +1.59 |
| Sama da 8 zuwa 12 [200 zuwa 300], inci. | -1/32 - +3/32 [-0.031 - 0.093] | -0.79 - +2.38 |
| Fiye da 12 [300] | ± 1% na ƙayyadaddun diamita na waje | |
Don bututun da aka umarce shi zuwa diamita, diamita na ciki ba zai bambanta fiye da 1% daga ƙayyadadden diamita na ciki ba.
Hakuri da Kaurin bango
Baya ga ƙayyadaddun ƙayyadaddun ƙayyadaddun kauri na bango don bututu wanda aka sanya ta iyakance akan nauyi a cikin ASTM A999, kaurin bango don bututu a kowane wuri zai kasance cikin juriyar da aka kayyade a cikin tebur da ke ƙasa:
| NPS [DN] Mai tsarawa | Hakuri |
| 1/8 zuwa 2 1/2 [6 zuwa 65] duk darajar t/D | -12.5% ~ +20.0% |
| Sama da 2 1/2 [65], t/D ≤ 5% | -12.5% ~ +22.5% |
| Sama da 2 1/2, t/D ： 5% | -12.5% ~ +15.0% |
| ASME | ASTM | EN | DIN | JIS |
| ASME SA335 P22 | Saukewa: ASTM A213T22 | DIN 10216-2 10CrMo9-10 | DIN 17175 10CrMo9-10 | Saukewa: JIS G3458STPA25 |
Abu:ASTM A335 P22 bututun ƙarfe da kayan aiki mara nauyi;
Girman:1/8 "zuwa 24", ko musamman bisa ga bukatun ku;
Tsawon:Tsawon bazuwar ko yanke don yin oda;
Marufi:Black shafi, beveled iyakar, bututu karshen kare, katako akwakun, da dai sauransu.
Taimako:Takaddun shaida na IBR, TPI dubawa, MTC, yankan, sarrafawa, da gyare-gyare;
MOQ:1 m;
Sharuɗɗan Biyan kuɗi:T / T ko L / C;
Farashin:Tuntube mu don sabon farashin bututun ƙarfe na T11;
