ASTM A283 xaashida birta kaarboon

ASTM A283 saxan bir ah ayaa leh qaab-dhismeed hoose oo dhexdhexaad ah oo xoog jilicsan oo kaarboon ah. Waxay leedahay afar kala duwanaansho caadi ah, mid kastaa wuxuu u taagan yahay walxo gaar ah. Qaybta sifooyinka alaabta ee hoose waxay muujinaysaa kala duwanaansho ka kooban dhammaan noocyada kala duwan.

Tilmaamahan ayaa daboolaya afar darajo oo ah taarikada birta kaarboon ee tayada qaab-dhismeedka ee codsiga guud. Shaybaarada birta ah waa in lagu dhalaaliyaa iyada oo lagu farsameeyo wadnaha furan, oksijiinta aasaasiga ah, ama foornada korontada. Falanqaynta kulaylka iyo badeecada waa in la sameeyaa iyada oo alaabta birta ahi ay waafaqi doonaan isku-dhafka kiimikaad ee loo baahan yahay ee kaarboon, manganese, fosfooraska, baaruud, silikoon, iyo naxaas. Muunadaha birtu waxay sidoo kale mari doonaan tijaabooyinka xajinta oo waa in ay waafaqaan qiyamka loo baahan yahay ee xoogga xajinta, dhibicda dhalida, iyo dhererka

ASTM A283 Guryaha Kiimikada

	Darajada A	Darajada B	Darajada C	Darajada D
Kaarboon, max	0.14	0.17	0.24	0.27
Manganese, max	0.90	0.90	0.90	0.90
Fosfooraska, max	0.035	0.035	0.035	0.035
Baaruud, max	0.04	0.04	0.04	0.04
Silikoon Taarikada 1 1 /2 gudaha iyo hoos, max Taarikada ka badan 1 1 /2 inji	0.40 0.15-0.40	0.40 0.15-0.40	0.40 0.15-0.40	0.40 0.15-0.40
Copper min % marka birta naxaasta la cayimo	0.20	0.20	0.20	0.20

ASTM A283 Guryaha Makaanikada

Darajada A	Darajada B	Darajada C	Darajada D
Xoogga Jilitaanka:	45,000 -60,000 psi [310 - 415 MPa]	50,000 -65,000 psi [345 - 450 MPa]	55,000 75,000 psi [380 - 515 MPa]	60,000 -80,000 psi [415 - 550 MPa]
Min. Barta Wax-soo-saarka:	24,000psi [165 MPa]	27,000psi [185 MPa]	30,000psi [205 MPa]	33,000 psi 230 MPa]
Kordhinta 8":	27% min	25% min	22% min	20% min
Ku dheeraynta 2":	38% min	28% min	25% min	23% min

ASTM A283 birta kaarboonku waa daawaha birta, oo lagu sii kala saarayo birta kaarboonka. Tani waa qeexida birta waxay dabooshaa afar darajo oo ah taarikada birta kaarboon hoose ee tayada qaab dhismeedka codsiga guud. Fasalada A, B, C iyo D.