| Jenis bayaran: | D/P,T/T,L/C |
| Incoterm: | FOB,CFR,CIF,EXW |
| Pengangkutan: | Ocean,Land,Express |
| Port: | Tianjin,Qingdao,Shanghai |
Model No.: AISI 4340
Standard: AiSi, ASTM, bs, GB, MAKAN, JIS
Tempat Asal: China
Proses Pengeluaran: Ditempa, Hot Rolled
Permohonan: Bar Keluli Struktur, Die Steel Bar, Bar keluli alat
Sama Ada Aloi: Adakah Aloi
Keluli Khas: Keluli Acuan
Spesies: Bar Keluli Aloi, Bar Keluli Karbon
Bertolak Ansur: ± 1%
Perkhidmatan Pemprosesan: Membengkok, Menyahtapis, Keratan, Menumbuk
| Unit Jualan | : | Ton |
| Jenis Pakej | : | Pembungkusan marin standard, atau seperti yang dikehendaki oleh pelanggan |
| Contoh Gambar | : |
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1: 4340 Pengenalan Keluli
AISI 4340 Steel adalah karbon sederhana, keluli aloi rendah yang terkenal dengan ketangguhan dan kekuatannya dalam bahagian yang agak besar. AISI 4340 juga merupakan satu jenis keluli nikel kromium molybdenum. 4340 keluli aloi biasanya dibekalkan keras dan marah dalam julat tegangan 930 - 1080 MPa. Keluli pra -keras dan marah 4340 boleh menjadi permukaan yang lebih keras oleh api atau pengerasan induksi dan dengan nitriding. Keluli 4340 mempunyai kejutan yang baik dan rintangan impak serta rintangan haus dan lelasan dalam keadaan keras. AISI 4340 Sifat keluli menawarkan kemuluran yang baik dalam keadaan anil, yang membolehkannya dibengkokkan atau terbentuk. Kimpalan Fusion dan Rintangan juga mungkin dengan keluli aloi 4340 kami. Bahan ASTM 4340 sering digunakan di mana keluli aloi lain tidak mempunyai kebolehkerjaan untuk memberikan kekuatan yang diperlukan. Untuk bahagian yang sangat tertekan, ia adalah pilihan yang sangat baik. Keluli aloi AISI 4340 juga boleh dimesin oleh semua kaedah adat.
Setara 2: 4340 keluli
| Country | Japan | Germany | Britain | USA |
| Standard | JIS G4103 | EN10250 | BS970 | ASTM A29 |
| Grade | SNCM439 | 36CrNiMo4/1.6511 | EN24/817M40 | 4340 |
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 4340 | 0.38-0.43 | 0.15-0.35 | 0.6-0.8 | 0.035 | 0.04 | 0.7-09 | 0.2-0.3 | 1.65-2.0 |
| 36CrNiMo4 | 0.32-0.4 | 0.4 | 0.5-0.8 | 0.035 | 0.035 | 0.9-1.2 | 0.15-0.3 | / |
| EN24 | 0.36-0.44 | 0.1-0.4 | 0.45-0.7 | 0.035 | 0.04 | 1.0-1.4 | 0.2-0.35 | 1.3-1.7 |
| SNCM439 | 0.36-0.43 | 0.15-0.35 | 0.6-0.9 | 0.03 | 0.03 | 0.6-1.0 | 0.15-0.3 | 1.6-2.0 |
5: 4340 Gambaran Keseluruhan Keluli
| Size | Round | Dia 6-1200mm |
| Plate/Flat/Block |
Thickness 6mm-500mm |
|
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Width 20mm-1000mm |
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| Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
| Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
| Delivery condition | Forged; Hot rolled; Cold drawn | |
| Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
| Payment terms | T/T;L/C;/Money gram/ Paypal | |
| Trade terms | FOB; CIF; C&F; etc.. | |
| Delivery time | 30-45 days | |
| Application | 4340 alloy steels are used for aircraft landing gear, automotive, oil and gas drilling, warm and cold forming, machine building, transfer systems like power transmission gears and shafts, general engineering industries and structural use applicatios such as heavy duty shafts, gears, axles, spindles, couplings, pins, chucks, molds and so on. | |
| Steel series | Representative steel type |
| Carbon Steel series | AISI 1020, 1045, A36, S355JR, S355JO |
| Petroleum machinery series | AISI 4150, AISI 4140, AISI 4130 |
| 30CrMo, 4145H | |
| Tool mold series | 1.2714, 5CrMnMo, 5CrNiMoV |
| 1.2738, 1.2311, 1.2312, 1.2714, H13 | |
| Bearing series | 52100, GCr15, SUJ2 |
| Marine series | 4140, 42CrMo, SCM440 |
| 709M40 | |
| Car series | SAE8620, 20CrNiMo |
| SNCM220 | |
| Heavy-duty transmission series | 40CrNiMo, SNCM439 |
| SAE4340, EN24 | |
| Mining machinery series | 655M13, 826M40 |
| 25CrMo | |
| Wind power gear series | 18CrNiMo7-6, 17CrNiMo6, 1.6582, 1.6587, SAE8620 |
| Wind power spindle series | 34CrNiMo6, 817M40 |
| Nitriding series | 20MnCr5, 38CrMoAl |
| 31CrMoV9 | |
| Pressure vessel series | 15CrMo, 13CrMo4-4 |
| Metallurgical roll series | 21CrMoV511, W1.7225 |
| EN19, 709M40 |
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