40Cr quenched and tempered qt steel round bar

40Cr quenched and tempered qt steel round bar

  • 40Cr quenched and tempered qt steel round bar
  • 40Cr quenched and tempered qt steel round bar
  • 40Cr quenched and tempered qt steel round bar
  • 40Cr quenched and tempered qt steel round bar
  • 40Cr quenched and tempered qt steel round bar
Model No.: 40Cr
Min. Order: 5 Metric Ton
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

40Cr quenched and tempered qt steel round bar


40Cr steel is a Chromium through-hardening steel of medium hardenability. It is a  a steel for quenching and tempering recommended to produce high strength components lower than 42CrMo4 material. It can be min hardness 52HRC after induction surface hardening. The similar materials includes 41CrS4, SS2245, 530M40, 530H40, SCR440, 42C4, 1.7035, 1.7039, 40Cr 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.


40Cr 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


Specification of 40Cr material quenched and tempered q&t steel bar we supply:

1. 40Cr steel equivalent material:





AS /NZS1444


Aisi 5140 / sae 5140 / astm 5140



AS 5140

2. 40Cr steel chemical composition:


Chemical Composition %













0.035 max

0.035 max


0.030 max

 3. 40Cr quenched and tempered steel to iso grade 8.8 mechanical properties:

Mechanical Properties

Yield Strength (MPa)

Tensile Strength (MPa)


Reduction of area


660 min

830 min

12% min

54% min

32HRC max

Note: The mechanical properties can be adjusted based on your requirements through Q&T.

4. 40Cr 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:


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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