4140 quenched & tempered qt steel round bar

4140 quenched & tempered qt steel round bar

  • 4140 quenched & tempered qt steel round bar
  • 4140 quenched & tempered qt steel round bar
  • 4140 quenched & tempered qt steel round bar
  • 4140 quenched & tempered qt steel round bar
  • 4140 quenched & tempered qt steel round bar
Model No.: aisi 4140 / sae 4140 / astm 4140
Min. Order: 5 Bag/Bags
Payment Type: L/C,T/T,D/P,Paypal,Money Gram,Western Union
Transportation: Ocean,Land,Air
Productivity: 3000 tons per month
Packaging: Anti-rusty standard seaworthy
Delivery Time: 30 Days
Place of Origin: Shandong Provnce, China
Brand: LE REN
Supply Ability: 3000 tons per month
Certificate: ISO 9001

Product Description

4140 quenched & tempered qt steel round bar

4140 steel is a king of Chromium-Molybdenum steel material with medium hardenability. It is a general purpose high-tensile steel with medium strength level and good impact properties. As a special steel bar factory, we can produce 4140 steel round bar, 4140 square bar, 4140 flat bar, 4140 hexagonal steel bar. We can also supply different delivery condition of 4140 steel bars such as 4140 hot rolled steel bar, 4140 cold drawn steel bar, 4140 peeled steel bar, 4140 turned steel bar, 4140 centerless ground and polished steel bar as well as 4140 annealed steel bar, 4140 normalized steel bar, 4140 quenched and tempered steel bar, that is to say, 4140 qt steel bar or 4140 q&t steel bar.

After heat treated especially quenching and tempering, 4140 steel bar can be get high tensile strength, high yield strength and high hardness. It is widely used in producing high strength components, shafts, bolts, tie rods etc. Quenching and Tempering, abbreviated as Q&T is a king of processing that strengthen or harden steel bars by heating the materials and then cooling in water, oil or other liquid medium, that rapidly the change from austenite to perlite to get the proper properties for various usage. The quenched & tempered steel bar materials are usually with carbon from 0.30% - 0.60%, it is widely used as merchant bars in components of various machines.


4140 material quenched and tempered q&t steel bar we supply includes following advangtages:

Consistent mechanical properties

Deep mechanical properties (from surface to the center according to your requirement)

Even hardness on the whole bars/Tougher and Increased strength

No brittle, UT testing/Precision size tolerance/Good straightness

Good Roughness/Professional technical service/Competitive price/Fast delivery

4140 steel material specification:

1. 4140 steel equivalent materials:

42CrMo Aisi 4140 / sae 4140 / astm 4140
42CrMo4 /DIN1.7225
AS 4140

2. 4140 steel material chemical composition:

0.035 max
0.035 max

3. 4140 steel mechanical properties:

Yield Strength Tensile Strength
Reduction of area
930MPa min
1080Mpa min
12% min
45% min

The steel mechanical properties can be adjusted according to different heat treatment. We can customize the products for you

4. 4140 steel applications:

high strength stud bolt, threaded rods, wind power bolt, prestressed anchor bolts, post stressed anchor bolt, steel tie rod, tie bar, tension rod, tension bar etc. Shaft, axle shaft, crankshaft, shaft for sleeve, linear shaft, pump shaft, rotor shaft, sensor shaft, spline shaft, drive shaft, mandrel shaft, transmission shaft, screw rod etc. CNC machines, precision CNC machines etc. Ejector pins and Ejector rods

5. Production line:

Qt Bar



6. Production Facilities:

 Heat Treatment

7. Inspection:


8. Package:

 Threaded Rod Packages

9. RFQ:

Q1. Are you a manufactuer?
A1:Yes, we have our own factory and labatory to produce and inspect products. 

Q2. How to ensure that every process's quality?

A2:Every process will be checked by our quality inspection department which insures every product's quality. we will personally go to tIn the production of products,he factory to check the quality of products.

Q3.How long is your delivery time?
A3:Our delivery time is generally 30 to 45 days. Or according to the quantity.

Q4. What is your payment method?
A4:30% value of T/T in advance and other 70% balance on B/L copy.
Q5.Can you provide a sample?
A5:Sure, Our sample is provided free of charge, but not including courier fees.

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