ASTM SAE4340 90mm Dia Alloy Round Bar SNCM439/40CrNiMoa Alloy Round Steel Bar
SNCM439/4340/40CrNiMo Round Steel Bar
SNCM439/4340/40CrNiMo Round Steel Bar
SNCM439/4340/40CrNiMo Round Steel Bar
SNCM439/4340/40CrNiMo Round Steel Bar
| grade | SNCM439/4340/40CrNiMo |
| application | widely used in the areas as ss fasteners , chains , kitchen and sanitary wares , furniture handles , handrails , electroplating and electrolyzing pendants , foods, electron , petroleum , construction and decoration , etc. with a high strength after cold-drawn , anti-stress corrosion , good surface . |
| chemcial composition | according to international standards of ASTM , AISI , JIS , ER , GB ,etc. |
| contact | Welcome your inquiries and hope we can build good & long cooperation |
MITTEL is a sizeable enterprise of manufacturing high-quality special steel and forging, we can do export and import by ourselves.
Our main production equipment are two 20MT and 50MT ultrahigh power electric furnaces, one 30MT LF fining furnace, one 30MT VD fining furnace, four 1-10MT electroslag furnaces, three 5MT electro-hydraulic hammers, one 8MN,one 16MN,one 20MT and one 45MN fast forging machines. Our testing equipment mainly includes large direct reading spectrographs from Switzerland and flaw detectors.
Process: EAF+LF+VOD+Forged+Heat Treatment(optional)
We mainly manufacture more than 300 kinds of forging products, such as alloy structural steel, alloy tool steel, carbon structural steel, carbon tool steel, bearing steel, roller steel, non-corrosive steel, refractory steel, spring steel and hardenability structural steel with dia. of 80-1200mm. Now,we can assure UT from dia. 80mm to 600mm,later we can assure dia.80mm-800mm.the UT criterion as GB/T,ASTM,ISO,SEP1921-3-C/C,JIS and other standard.
We usuraly export the following grade as CK45,S45C,C45E,AISI1045,42CrMo4,42CrMo4V,SCM440,ASTM4340,34CrNiMo6,18CrNiMo7-6,S355J2G3,St53-2,ASTM4140,SCM415,19Mn2
Our products sell well in more than 20 countries and regions, such as the United States, Britain, Germany, France, Italy, Spain, Russia, Australia, Turkey, Belgium, Chile, Egypt, Korea, Japan, Taiwan Area, Hong Kong and Southeast Asia.
Detailed Description:
Grade: SNCM439
Manufacture: EAF+LF+VD(Annealed, Normalized, Peeled, Rough turned)
Size: 80MM to 1200MM
Dia. Tol: -0/+3MM
Strightness: 3mm/M Max
Length: According to customer’s requirement( Normal length is 3-6M)
Inspection: UT test follows as GB/T6402-91 CLASS 3 or SEP 1921 C/C
Cut both ends
Payment: T/T or L/C
Time of shippment: 20-45 days after receiving deposit or L/C
If you have any demand and exercise alone, please send to my E-MAIL , I will give you the quotation as soon as possible.
SNCM439/4340/40CrNiMo Round Steel Bar
SNCM439/4340/40CrNiMo Round Steel Bar
Product Introduction
EN24 equivalent 40CrNiMo, which is China standard grade, can be AISI 4340, Din 36CrNiMo4, W-Nr 1.6511 equivalent as well. Generally speaking, they can be equivalent each other if not very special application condition.
Most customer purchase 40CrNiMo as EN24 equivalent, especially customer from British, Middle east, and Africa. We sell large quantity to such district big quantity each year. China standard 40CrNiMo are widely accepted as EN24 equivalent and other grade SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511 word wide for reasons as following:
Mechanical Performance for 40CrNiMo and EN24 steel are similar.
Price for 40CrNiMo is much cheaper compared other mentioned grade above
40CrNiMo is the most widely used engineering alloy steel in China, usage is huge, stock is always enough, can support quickly shipment.
China standard steel quality is good, and qualified at almost all condition EN24, SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511 applied.
Equal Standards
| Chinese | American | German | Japanese | British |
| GB | AISI | DIN | JIS | BS |
| 40CrNiMo | SAE4340 | 1.6511 | SNCM439 | EN24 |
Chemical Composition
| Grades | C | Si | Mn | P | S | Cr | Mo | Ni |
| AISI 4340 | 0.38-0.43 | 0.15-0.35 | 0.6-0.8 | ≤0.035 | ≤0.040 | 0.70~0.90 | 0.20~0.30 | 1.65~2.00 |
| GB 40CrNiMo | 0.37~0.44 | 0.17~0.37 | 0.50~0.80 | ≤0.025 | ≤0.025 | 0.60~0.90 | 0.15~0.25 | 1.25~1.65 |
| 40NiCrMo7 | 0.37-0.44 | 0.15-0.4 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.60~0.90 | 0.2-0.3 | 1.6-1.9 |
| W.Nr. 1.6511 | 0.35~0.45 | ≤0.40 | 0.60~0.80 | ≤0.035 | ≤0.040 | 0.90~1.20 | 0.15~0.30 | 1.40~1.70 |
Heat Treatment
| Quenching | Tempering |
| Heating Temperature/ºC | Cooling | Hardness/HRC | Heating Temperature/ºC | Cooling | Hardness/HRC |
| 820-840 | Oil | ≥53 | 450-650 | Air | 25-40 |
Mechanical Properties
| Tensile strength (psi) | 105,000 - 115,000 |
| Yield strength (psi) | 75,000 - 85,000 |
| Elongation in 2" (%) | 20 - 30 |
| Reduction of area (%) | 35 - 45 |
| Brinell Hardness (BHN) | 210 - 240 |
Applications
Aircraft Landing Gear
Power Transmission Gears
Structural Use Applications
High strength shafts
Punches & dies
Drill bushings
Retaining rings
Gears
Available stock size
| Plate | Thickness | 20-120mm |
| Width | 2200mm |
| Length | 4000-10000mm |
| round bar | Diameter | 20-500mm |
| Length | 3000-6000mm |
Q1: Why choose us?
A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.
Q2: Can you provide OEM/ODM service?
A: Yes. Please feel free to contact us for more details.
Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
Q4: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q5: Can you provide sample?
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.
Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.
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ASTM SAE4340 90mm Dia Alloy Round Rod SNCM439/40CrNiMoa Forged Steel Round Bar Images
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