Hot rolled S20C A36 1045 S45C 4140 steel round bar 

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.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. 
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.
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

Packaging & Shipping

Export standared package or as required

Lead time :7-20days based on the quantity

 

Our Services

1.Professional Export Experienced sales team, we have learn more products knowledge and our goods with high quality and competitive price

 

2.Fast delivery and short shipping schedule

Once deposit reaches, we will arrange the products at the same day without delay;

Professional purchasing team to find the best goods you need in the shortest time;

Professional shipping company to arrange the shortest schedule to your destination.

There are many stock in our warehouse.(steel plate,steel sheet,steel pipe,steel tube,steel bar,etc.)

 

3.When you not have purchasing plan, we can send you instant market information;

When you plan to purchase, we will give a timely reply in the shortest time;

When you finish purchasing, we will follow you for the products using effect timely.

More questions, please send us the email to us

Why Choose Us?
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.
 
 
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.

Product Details: