AISI 4340 Steel 36CrNiMo4 1.6511 EN24 817M40 SNCM439

AISI 4340 Steel 36CrNiMo4 1.6511 EN24 817M40 SNCM439

CHII CHINONZI 4340 STEEL PROPERTIES? 4340 simbi ichromium-molybdenum alloy simbi inopa yakanakisa tensile uye simba rekuita. Kuwedzerwa kwe molybdenum kunopa 4340 simba repamusoro pane mamwe magiredhi esimbi, nepo chromium ichiwedzera kuomarara, abrasion kuramba, uye kusapfeka kupfeka. inowanzoshandiswa mumashandisirwo anoda simba repamusoro uye kuoma. 4340 inowanikwa muhukuru hwakasiyana-siyana uye maumbirwo, zvichiita kuti ive sarudzo yakanaka kune dzakasiyana siyana dzekushandisa. Bata isu kuti uwane rumwe ruzivo nezve 4340 simbi zvivakwa uye kuwanikwa.

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Product sumo Technical data

Product sumo

AISI 4340simbiisimbi yepakati kabhoni, yakaderera alloy simbi inozivikanwa nekuoma kwayo uye kusimba muzvikamu zvakati kurei. AISI 4340 zvakare imwe mhando ye nickel chromium molybdenum masimbi. 4340 alloy simbi inowanzo kupihwa yakaomeswa uye yakapfava mutensile renji ye930 - 1080 Mpa. Pre kuomeswa uye kushatirwa 4340 simbi dzinogona kuomeswazve pamusoro nemurazvo kana induction kuomesa uye ne nitriding. Iyo 4340 simbi ine kuvhundutsa kwakanaka uye kupikisa kwemaitiro pamwe nekupfeka nekuramba kweabrasion mumamiriro ekuomarara. AISI 4340 simbi zvivakwa zvinopa yakanaka ductility mune annealed mamiriro, achiibvumira kukotama kana kuumbwa. Fusion uye kuramba welding zvakare inogoneka neyedu 4340 alloy simbi. ASTM 4340 zvinhu zvinowanzo shandiswa uko mamwe masimbi alloy asina kuomarara kupa simba rinodiwa. Kune zvikamu zvakasimbiswa zvakanyanya isarudzo yakanaka. AISI 4340 alloy steel inogonawo kugadzirwa nenzira dzose dzechivanhu.

Nekuda kwekuwanikwa iyo ASTM 4340 giredhi simbi inowanzotsiviwa neEuropean based standards 817M40/EN24 uye 1.6511/36CrNiMo4 kana Japan based SNCM439 simbi. Iwe une ruzivo rwakadzama rwe4340 simbi pazasi.

1. AISI Alloy 4340 Steel Supply Range

4340 Steel Round Bar: dhayamita 8mm - 3000mm (*Dia30-240mm mune stock mune annealed mamiriro, nekukasira kutumira)

4340 Steel Plate: ukobvu 10mm - 1500mm x hupamhi 200mm - 3000mm

4340 Steel Giredhi Square: 20mm - 500mm

Surface Finish: Dema, Rough Machined, Yakatendeuka kana sezvinodiwa zvakapihwa.

Technical data

2. AISI 4340 Steel Speciation uye Relevant Standards

Nyika	USA	Britain	Britain	Japani
Standard	ASTM A29	EN 10250	BS 970	JIS G4103
MaGrades	4340	36CrNiMo4/ 1.6511	EN24/817M40	SNCM 439/SNCM8

3. ASTM 4340 Steels And Equilvalents Chemical Composition

Standard	Giredhi	C	Mn	P	S	Si	Ni	Cr	Mo
ASTM A29	4340	0.38-0.43	0.60-0.80	0.035	0.040	0.15-0.35	1.65-2.00	0.70-0.90	0.20-0.30
EN 10250	36CrNiMo4/ 1.6511	0.32-0.40	0.50-0.80	0.035	0.035	≦0.40	0.90-1.20	0.90-1.2	0.15-0.30
BS 970	EN24/817M40	0.36-0.44	0.45-0.70	0.035	0.040	0.1-0.40	1.3-1.7	1.00-1.40	0.20-0.35
JIS G4103	SNCM 439/SNCM8	0.36-0.43	0.60-0.90	0.030	0.030	0.15-0.35	1.60-2.00	0.60-1.00	0.15-0.30

4. AISI Alloy 4340 Steel Mechanical Properties

Mechannical Properties (Heat Treated Condition)	Condition	Chikamu chekutonga mm	Tensile Simba MPa	Goho Simba MPa	Elong. %	Izod Impact J	Brinell Kuoma
	T	250	850-1000	635	13	40	248-302
	T	150	850-1000	665	13	54	248-302
	U	100	930-1080	740	12	47	269-331

	V	63	1000-1150	835	12	47	293-352
	W	30	1080-1230	925	11	41	311-375
	X	30	1150-1300	1005	10	34	341-401

	Y	30	1230-1380	1080	10	24	363-429
	Z	30	1555-	1125	5	10	444-

Thermal Properties

Properties	Metric	Imperial
Kuwedzera kupisa kunoshanda pamwe chete (20°C/68°F, mafuta emuenzaniso akaomeswa, 600°C (1110°F) hasha	12.3 µm/m°C	6.83 µin/mu°F
Thermal conductivity (yakajairika simbi)	44.5 W/mK	309 BTU mukati/hr.ft².°F

5. Kugadzirwa kwe4340 Alloy Steel

Preheat simbi 4340 kutanga, kupisa kusvika 1150 ° C - 1200 ° C yepamusoro yekugadzira, bata kusvikira tembiricha yafanana muchikamu chose.

Usakanganwa pasi pe850 °C. 4340 ine yakanaka yekuumba hunhu asi kungwarira kunofanirwa kutorwa kana kutonhora sezvo simbi ichiratidza kuve nyore kutsemuka. Kutevera kushanda kwekugadzira basa rinofanira kutonhodzwa zvishoma nezvishoma sezvinobvira. Uye kutonhora mujecha kana lime yakaoma inokurudzirwa nezvimwe.

6. AISI 4340 Steel Grade Heat Treatment

Kuderedza Stress

Kune pre-yakaomeswa simbi yekureverera kunowanikwa nekudziisa simbi 4340 kusvika pakati pe500 kusvika 550°C. Kupisa kusvika 600 °C - 650 °C, bata kusvika tembiricha yafanana muchikamu chose, nyura kweawa imwe pachikamu che25 mm, uye kutonhorera mumhepo yakanyarara.

Annealing

Aneal yakazara inogona kuitwa pa844 ° C (1550 F) ichiteverwa neinodzorwa (choto) kutonhora pamwero usinga mhanyisa kupfuura 10 ° C (50 F) paawa pasi kusvika 315 ° C (600 F). Kubva pa315°C 600F inogona kunge yakatonhodzwa mweya.

Tempering

AISI 4340 alloy simbi inofanirwa kunge iri mukupisa yakagadziriswa kana yakajairwa uye yekupisa inorapwa mamiriro isati yapisa. Tembiricha yekudziya inoenderana nedanho resimba rinodiwa. Pamazinga esimba mu260 - 280 ksi range temper pa232°C (450 F). Nokuda kwesimba mu 125 - 200 ksi range temper pa 510 ° C (950 F). Uye usatsamwisa 4340 simbi kana iri mu 220 - 260 ksi simba renji sezvo kushatirwa kunogona kuguma nekudzikira kwekukanganisa kupikisa kweiyi nhanho yesimba.

Kupisa kunofanirwa kudzivirirwa kana zvichikwanisika mukati meiyo 250 °C - 450 °C nekuda kwehasha brittleness.

Flame kana Induction Kuomesa

Sezvambotaurwa pamusoro apa, pre-yakaomeswa uye yakadzikama 4340 simbi mbariro kana mahwendefa anogona kuwedzere kuomeswa nemoto kana induction kuomesa mitoo inokonzeresa kuomarara kwekesi kudarika Rc 50. AISI 4340 masimbi esimbi anofanirwa kupiswa nekukurumidza sezvinobvira iyo austenitic tembiricha renji (830 ° C - 860 ° C) uye inoda kudzika kwekesi inoteverwa neoiri pakarepo kana kudzimwa kwemvura, zvichienderana nekuoma kunodiwa, saizi yebasa/ chimiro uye hurongwa hwekudzima.

Kutevera kudzima kudziya kwemaoko, kupisa pa150 ° C - 200 ° C kunoderedza kushushikana mune iyo kesi nekukanganisa kushoma pakuoma kwayo.

Zvese de-carburised pamusoro pezvinhu zvinofanirwa kutanga zvabviswa kuti zvive nemhedzisiro yakanaka.

Nitriding

Yakaomeswa uye inopisa 4340 alloy simbi inogonawo kuve nitrided, ichipa kuoma kwepamusoro kusvika kuRc 60. Kupisa kusvika ku500 ° C - 530 ° C uye kubata nguva yakakwana (kubva pa10 kusvika kumaawa 60) kukudziridza kudzika kwekesi. Nitriding inofanira kuteverwa nekutonhora zvishoma nezvishoma (pasina kudzimwa) zvichideredza dambudziko rekuvhiringika. Iyo nitrided giredhi 4340 zvinhu zvinogona kugadzirwa kusvika padhuze nehukuru hwekupedzisira, zvichisiya diki rekugaya chete. Kusimba kwekusimba kweiyo 4340 simbi yesimbi yepakati kazhinji haikanganisike sezvo tembiricha ye nitriding kazhinji iri pazasi petembiricha yekupisa inoshandiswa.

Kuomarara kwepamusoro kunowanikwa 600 kusvika 650HV.

7. Machinability

Kugadzira kunoitwa zvakanyanya nealloy simbi 4340 mune yakanyungudutswa kana kuti yakajairika uye yakapfava. Inogona kugadzirwa nyore nyore nemaitiro ose akajairika akadai sekuona, kutendeuka, kuchera nezvimwewo. Zvisinei mumamiriro ekusimba e200 ksi kana kupfuura machinability inongobva ku25% kusvika ku10% iyo yealloy mu annealed condition.

8. Welding

Welding yesimbi 4340 muakaomeswa uye ane hasha mamiriro (sezvaanowanzo kupihwa), hazvikurudzirwe uye zvinofanirwa kudziviswa kana zvichikwanisika, nekuda kwengozi yekudzima kuputika, sezvo michina yemagetsi ichashandurwa mukati meiyo weld kupisa kwakakanganiswa nzvimbo.

Kana welding ichifanira kuitwa, pre-heat kusvika 200 kusvika 300°C uye chengetedza izvi paunenge uchiwedha. Pakarepo mushure mekutambisa kushushikana kudzikamisa pa550 kusvika 650 ° C, kusati kwaoma uye kupisa.

Kana welding mumamiriro akaoma uye ane hasha akanyatsokodzera, ipapo chidimbu chebasa, pakarepo pakutonhodza kuti chidziye ruoko, chinofanira kunge chiripo kana zvichibvira kudzoreredzwa kushushikana pa15 °C pazasi petembiricha yekutanga.

9. Kushandiswa kwe4340 Steel

AISI 4340 simbi inoshandiswa mune dzakawanda indasitiri zvikamu zvezvikumbiro zvinoda yakakwirira tensile / goho simba kupfuura 4140 simbi inogona kupa.

Mamwe maapplication akajairika akadai se:

Ndege Yekutakura Gear
Motokari,
Kuchera Oiri neGasi,
Kugadzira,
Inodziya uye Inotonhora Kuumba,
Kuvaka Machine,
Transfer Systems, senge magetsi ekufambisa magiya uye shafts.
General engineering maindasitiri uye zvimiro zvekushandisa zvikumbiro, senge: inorema duty shafts, magiya, maekisi, maspindle, couplings, mapini, chucks, molds nezvimwe.

Gnee Steel ndeimwe yeanotungamira mutengesi weAISI 4340 simbi kune yako yakasiyana application sepamusoro. Uye isu tinopa 4140 simbi, 4130 simbi zvakare. Ndibate uye ndizivise zvikumbiro zvako chero nguva.