Loading Port:China main port
Payment Terms:TT OR LC
Min Order Qty:30 m.t.
Supply Capability:10000 m.t./month
AISI 4340 Forged Round Steel Bars
Products Details
aisi 4340 forged steel round bars | |||||||||||
Comparative standard | Grade | C | Si | Mn | Cr | Mo | V | W | P | S | Ni |
GB | 40CrNiMoA | 0.36-0.44 | 0.10-0.350 | 0.45-0.70 | 1.10-1.40 | 0.20-0.35 | 0.03 | 0.02 | 1.30-1.7 | ||
AISI | 4337/4340 | ||||||||||
JIS | SNCM8 | ||||||||||
DIN | 34CrNiMo6/1.6582 | 0.34 | max 0.40 | 0.65 | 1.50 | 0.23 | 0.03 | 0.03 | 1.50 | ||
Dimensions | |||||||||||
Round bar | |||||||||||
Dia:10mm~700mm | Length:2m~6m | ||||||||||
Flat bar | |||||||||||
Thickness:10mm~500mm | Length:2m~12m | ||||||||||
*Dimensions can be customized | |||||||||||
Heat Treatment | |||||||||||
Normalizing | 850-880°C | - | |||||||||
Stress Relieving | 650°C | air cooling | |||||||||
Quenching | 830-860°C | oil quenching | |||||||||
Tempering | 540-660°C | ||||||||||
1.Normalizing | |||||||||||
Normalizing temperature : 850-880°C | |||||||||||
2.Stress Relieving | |||||||||||
Stress relieving to remove machining stresses should be carried out by heating to approx.650°C, | |||||||||||
holding for 1-2 hours at heat,followed by air cooling . | |||||||||||
This operation is performed to reduce distortion during heat treatment . | |||||||||||
3.Hardening | |||||||||||
Harden from a temperature of 830-860°C followed by oil quenching. | |||||||||||
Quenching temperature in the end quench test is 850°C. | |||||||||||
4.Tempering | |||||||||||
tempering temperature: 540-660°C | |||||||||||
Detail information | |||||||||||
Process | EAF+LF+VD+Forging+(Rolling)+Annealing Condition (optional) | ||||||||||
Delivery Condition | Hot forged+Rough machined/turned surface | ||||||||||
MOQ | 1 ton | ||||||||||
Technical Data | According to customer’s requirements of chemical composition, physical properties and mechanical testing | ||||||||||
Ultrasonic Test | Ultrasonic test according to SEP 1921-84 G3 D/d E/d | ||||||||||
Applications | |||||||||||
Hot extrusion dies, forging die forging hammer, forging press die, precision forging die well as aluminum, copper and alloys die-casting mold. | |||||||||||
Relevant documents | |||||||||||
Contract Documents | Contract, Debit Note, PI(Performa Invoice) | ||||||||||
Shipping Documents | B/L(Bill of Loading), Packing List, Shipping list, CI(Commercial Invoice) | ||||||||||
Certifications | SGS, ISO9001-2008, UT(Ultrasonic Test), CO(Certificate of Original), MTC(Milling Test Certificate) |
Products Show
Product Overviews
Product Name | Typical Grades | Diameter(mm) | Standard adopted |
Carbon Steel | 20 (1020/S20C/C22) | Ø16-Ø300 |
GB/SAE/JIS/DIN
|
40 (1040/S40C/C40) | |||
45 (1045/S45C/C45) | |||
Bearing Steel | GCr9 (51100/SUJ1) | Ø12-Ø250 | |
GCr15 (52100/SUJ2/100Gr6) | |||
GCr9SiMn (A485-Gr.1/SUJ3) | |||
Cr-Mo Steel | 20Cr (5120/SCr420H/20Cr4) | Ø12-Ø250 | |
40Cr (5140/SCr440/41Cr4) | |||
42CrMo(4140/SCM440/42CrMo4) | |||
Gear Steel | 20CrNiMo | Ø16-Ø600 | |
20CrMn(5115/SMnC420/20MnCr5) | |||
20CrNiMo(8620/SNCM220/20CrMiMo2) |
Application
Carbon Steel | Mold bottom, Plastic mold, Construction machinery parts Automobile parts, Security grills, Screens, Construction |
Bearing Steel | Aerospace, Navigation, Nuclear energy, Chemical industry Electronic information, Petrochemical, Instrument and meter Transportation |
Cr-Mo Steel | Mechanism & Fasteners gear, Stressed components for vehicles Engines and machines, Parts of larger cross-section |
Gear Steel | All kinds of gears, Statically and dynamically stressed component for vehicles Engines and machine, Larger cross-section parts, Crankshafts |
Work Shop
Company Information
CNBM International Corporation is the most important trading platform of CNBM group.
Whith its advantages, CNBM International are mainly concentrate on Cement, Glass, Iron and Steel, Ceramics industries and devotes herself for supplying high qulity series of refractories as well as technical consultancies and logistics solutions.
FAQ
1, Your advantages?
professional products inquiry, products knowledge train (for agents), smooth goods delivery, excellent customer solution proposale
2, Test & Certificate?
SGS test is available, customer inspection before shipping is welcome, third party inspection is no problem
3, Factory or Trading Company?
CNBM is a trading company but we have so many protocol factories and CNBM works as a trading department of these factories. Also CNBM is the holding company of many factories.
4, Payment Terms?
30% TT as deposit and 70% before delivery.
Irrevocable L/C at sight.
5, Trading Terms?
EXW, FOB, CIF, FFR, CNF
6, After-sale Service?
CNBM provides the services and support you need for every step of our cooperation. We're the business partner you can trust.
For any problem, please kindly contact us at any your convenient time.
We'll reply you in our first priority within 24 hours.
Packaging & Delivery
1, Packaging: seaworthy package or as required
2, Delivery: 35-45 days or based on quantity