- Overview
- Product Description
- Detailed Photos
- Product Parameters
- Packaging & Shipping
- Our Advantages
- After Sales Service
- FAQ
- Application
Basic Info.
Product Description
Grade: AISI 4140, 4130, 5140, 5120
Alloy structural steel: 4140
Executive standard: ASTM A29/A29M-04 4140 steel. This steel has good workability, small processing deformation, and good fatigue resistance. It is a medium hardenable steel. After heat treatment, 4140 has good strength and good comprehensive mechanical properties, good manufacturability, and yield high.
The highest service temperature is 427 degrees Celsius, 4140 strength, hardenability, good toughness, small deformation during quenching, high creep strength and enduring strength at high temperature.
It is used to manufacture forgings that require higher strength and larger quenched and tempered section than 35CrMo steel, such as large gears for locomotive traction, supercharger transmission gears, rear axles, connecting rods and spring clips that are heavily loaded, and can also be used Drill pipe joints and fishing tools for oil deep wells below 2000m, and can be used for molds of bending machines.
Product name | steel round bar | |
Size | O.D | 8-480mm |
Length | 1-12m | |
Standard | AISI,ASTM,GB,DIN,BS,JIS | |
Grade | AISI 4140, 4130, 5140, 5120 | |
Inspection | X-ray inspection, manual ultrasopic inspection,surface inspection,hydraulic testing | |
Technique | Hot Rolled | |
Section Shape | Round | |
Main Market | Southeast Asia, Middle East, Australia,USA,South America,Africa | |
Productivity | 5000 Tons/month | |
Packing | Standard bundle package Beveled end or as per request | |
Surface Treatment | Black Painted or Customized all available | |
Date of Delivery | According to The Specifications And the Quantities Of Each Contract, | |
Method of Payment | T/T L/C | |
Method Of Delivery | Terms According To the <INCOTERMS 2000> for International Trading | |
Remarks | 1.Payment Terms T/T, L/C | |
2.Trade Term:FOB/CFR/CIF | ||
3.Minimum Quantity of Order: 2 Tons | ||
4.Delivery Time:7-15 days after receipt of deposit | ||
AISI 4130 Chemical composition (%)
| Item | C | Si | Mn | P | Mo | Cu | Cr | Ni | S |
| 4130 | 0.28-0.33 | 0.15-0.35 | 0.40-0.60 | ≤0.035 | 0.15-0.25 | ≤0.030 | 0.80-1.10 | ≤0.030 | ≤0.040 |
AISI 4130 Mechanical properties
| Tensile Strength | Elongation | Yield Strength | Hardness after Hardened(HB) | 180°old Bending Test |
| ≥930MPa | ≥12% | ≥785 MPa | ≤229 | Qualified |
AISI 4140 Chemical Composition
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | |
| 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤0.035 | ≤0.040 | 0.80-1.10 | 0.15-0.25 |
Delivery Condition:Q+T
Mechanical properties Tensile Strength σb≥1080 MPA Yield Strength σs≥930 MPA
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.
Pre-sale Service
1.Good quality + Factory price + Quick response + Reliable service
2.100% responsible for the quality:all the products are produced by our professional workman and we have a high-work-effect foreigh trade team.
3.We have enough stock and can deliver in short time.
4.Customized designs,colors,sizes and logos are welcome,responsiveness to customers' requirements.
After-sale Service:
1.We will count cheapest shipping cost and make invoice to you at once.
2.On time delivery.
3.Provide real pictures of loading container,email you the tracking NO. and help to chase the products until the goods arrive you.
4.24 hours online service,if any question,please contact us at anytime in your convenience.
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 the email to us!
