China suppliers 4140 round bar 6mm mild steel rod
Product Information Introduce
AISI 4140 steel is a low alloy steel containing chromium, molybdenum, and manganese. It is widely used across numerous industries and is an excellent material choice due to its toughness, high fatigue strength, and abrasion and impact resistance. Not many grades can match the versatility and usefulness of 4140.
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Product name |
steel round bar |
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Size |
O.D |
8-480mm |
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Length |
1-12m |
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Standard |
AISI,ASTM,GB,DIN,BS,JIS |
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Grade |
4140,4130, 5140,5130 |
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Inspection |
X-ray inspection, manual ultrasopic inspection,surface inspection,hydraulic testing |
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Technique |
Hot Rolled |
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Section Shape |
Round |
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Main Market |
Southeast Asia, Middle East, Australia,USA,South America,Africa |
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Productivity |
5000 Tons/month |
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Packing |
Standard bundle package Beveled end or as per request |
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Surface Treatment |
Black Painted, PE Coated, Galvanized or Customized all available |
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Date of Delivery |
According to The Specifications And the Quantities Of Each Contract,
Time Start To Begin When We confirm the Date of the Earnest or L/C |
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Method of Payment |
T/T L/C |
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Method Of Delivery |
Terms According To the <INCOTERMS 2000> for International Trading |
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Remarks |
1.Payment Terms T/T, L/C |
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2.Trade Term:FOB/CFR/CIF |
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3.Minimum Quantity of Order: 2 Tons |
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4.Delivery Time:7-15 days after receipt of deposit |
Applications
This alloy finds many applications as forgings for the aerospace and oil and gas industries, along with myriad uses in the
automotive, agricultural and defense industries, Typical uses are forged gears and shafts, spindles, fixtures, jigs and collars.
| Grade |
C |
Cr |
Mn |
Si |
Mo |
S |
P |
| 4140 |
0.38-.43% |
0.80-1.10% |
0.75-1.0% |
0.15-0.30% |
0.15-0.25% |
0-0.040% |
0-0.035% |
| Properties |
Metric |
Imperial |
| Tensile strength |
655 MPa |
95000 psi |
| Yield strength |
415 MPa |
60200 psi |
| Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
| Shear modulus (typical for steel) |
80 GPa |
11600 ksi |
| Elastic modulus |
190-210 GPa |
27557-30458 ksi |
| Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
| Elongation at break (in 50 mm) |
25.70% |
25.70% |
| Hardness, Brinell |
197 |
197 |
| Hardness, Knoop (converted from Brinell hardness) |
219 |
219 |
| Hardness, Rockwell B (converted from Brinell hardness) |
92 |
92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) |
13 |
13 |
| Hardness, Vickers (converted from Brinell hardness) |
207 |
207 |
| Machinability (based on AISI 1212 as 100 machinability) |
65 |
65 |
Heat Treatment
AISI 4140 alloy steel is heated at 845°C (1550°F) followed by quenching in oil. Before hardening, it can be normalized by heating it at 913°C (1675°F) for a long period of time, followed by air cooling.
Forging
AISI 4140 alloy steel is forged at 926 to 1205°C (1700 to 2200°F)
Hot Working
AISI 4140 alloy steel can be hot worked at 816 to 1038°C (1500 to 1900°F)
Cold Working
AISI 4140 alloy steel can be cold worked using conventional methods in the annealed condition.
Annealing
AISI 4140 alloy steel is annealed at 872°C (1600°F) followed by slowly cooling in the furnace.
Tempering
AISI 4140 alloy steel can be tempered at 205 to 649°C (400 to 1200°F) depending upon the desired hardness level. The hardness of the steel can be increased if it has a lower tempering temperature. For example, a tensile strength of 225 ksi can be achieved by tempering at 316°C (600°F), and tensile strength of 130 ksi can be achieved by tempering at 538°C (1000°F).
Hardening
AISI 4140 alloy steel can be hardened by cold working, or heating and quenching.
Machinability
AISI 4140 alloy steel has good machinability in the annealed condition.
Forming
AISI 4140 alloy steel has high ductility. It can be formed using conventional techniques in the annealed condition. It requires more pressure or force for forming because it is tougher than plain carbon steels.
Welding
AISI 4140 alloy steel can be welded using all conventional techniques. However, the mechanical properties of this steel will be affected if it is welded in the heat-treated condition, and post-weld heat treatment should be performed.
Product Details
Produce Process
(1) Material
Tensile strength (kgf/mm²): >58
Yield strength (kgf/mm²): >35
Elongation (%): >20
Cross section reduction rate (%): >45
Hardness (Hb): 167~229
(2) After heat treatment
Tensile strength (kgf/mm²): >70
Yield strength (kgf/mm²): >50
Elongation (%): >17
Cross section reduction rate (%): >45
Hardness (Hb): 201~269
Application
Round steel is a long strip of steel with a solid cross section. Its specifications are expressed in millimeters in diameter. They are divided into three types: hot-rolled, forged, and cold-drawn. The hot-rolled specifications are 5.5-250 mm. They are often used as steel bars, bolts, and various Mechanical parts, round steel larger than 25 mm is mainly used to manufacture mechanical parts and seamless steel tube billets.
Packaging & Shipping
Why Choose Us?https://steelguang.en.made-in-china.com/company-Henan-Steel-Guang-International-Trade-Co-Ltd-.html
Our advantages:
1. More than 10 years Professional steel export service. Have own production line.
2. Advanced CNC machine.
3. Low cost&Quick Delivery&High quality.
4. Integrity, strength and quality of products recognized by the industry.
5. Most of our clients are international, the domestic well-known enterprises.
6. Has a complete scientific quality management system.
7. Can meet any requirements for all kinds of sheet metal processing with advanced equipment.
FAQ
Q1: How can I get a sample to check your metal work quality?
Answer: After price confirmation, you can require for samples to check our quality. We will provide you sample for free (value under USD35), as long as you afford the express freight.
Q2: How long can I expect to get the metal work sample?
Answer: After you pay the sample charges(if there is) and send us confirmed drawings, the sample will be ready for delivery in 5-7 working days. The samples will be sent to you via DHL, FedEx,UPS,TNT or EMS. It should arrive in 3-5 workdays. You can use your own express account or prepay us if you don't have any account.
Q3: What about the leading time for metal work mass production?
Answer: Honestly, it depends on the order quantity. Normally, 15 workdays to 30 workdays after your deposit if no the samples are confirmed.
Q4: What will we do if the metal work quality is not ok ?
Answer: If the quality problem is caused by our mistake, we will make replacement order for free or pay the back product charge and handling charge back to you.
More questions, please send us the email to us
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