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Address: Qianqiao Industrial Park, Huishan District, Wuxi City, Jiangsu Province
Contact name:Jeff
EDEST STEEL CO.,LTD |
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AISI 4140 4130 round bar 4140 alloy bar low carbon alloy bar round bar
AISI 4140 rod is a low alloy steel containing chromium, molybdenum
and manganese
It is widely used in many industries and is an excellent material
choice due to its toughness, high fatigue strength, wear resistance
and impact resistance. Not many grades can match the versatility
and utility of 4140.
4140 bar is often used to manufacture various mechanical parts,
such as shafts, pins, gears, connecting rods, etc. Due to its high
strength and good toughness, 4140 rod is able to withstand high
loads and impacts while maintaining stable performance.
AISI 4140 is an alloy structural steel used in engineering structures such as high-strength shafts, bolts and nuts, gears, pinions and spindles. The locomotive traction consists of large gear, supercharger drive gear, pressure vessel, rear axle, gear load connecting rod and spring clamp.
Chemical composition
| ASTM A29/29M | C | Si | Mn | Cr | Mo | P | S |
| 4140 | 0.38~0.43 | 0.15~0.35 | 0.75~1.00 | 0.80~1.10 | 0.15~0.25 | ≤0.035 | ≤0.040 |
| DIN WN-r | C | Si | Mn | Cr | Mo | P | S |
| 1.7225 | 0.38~0.45 | ≤0.40 | 0.60~0.90 | 0.90~1.20 | 0.15~0.30 | ≤0.035 | ≤0.035 |
| GB/T | C | Si | Mn | Cr | Mo | P | S |
| 42CrMo | 0.38~0.45 | 0.17~0.37 | 0.50~0.80 | 0.90~1.20 | 0.15~0.25 | ≤0.030 | ≤0.030 |
| BS | C | Si | Mn | Cr | Mo | P | S |
| 708M40 | 0.36~0.44 | 0.10~0.35 | 0.70~1.00 | 0.90~1.20 | 0.15~0.25 | ≤0.035 | ≤0.035 |
| JIS | C | Si | Mn | Cr | Mo | P | S |
| SCM440 | 0.38~0.43 | 0.15~0.35 | 0.60~0.85 | 0.90~1.20 | 0.15~0.30 | ≤0.030 | ≤0.030 |
| 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 of 4140 round steel:
heat treatment
AISI 4140 alloy steel is heated at 845°C (1550°F) and then quenched
in oil. Before hardening, it can be normalized by prolonged heating
at 913°C (1675°F), followed by air cooling.
forging
AISI 4140 alloy steel forged at temperatures from 926 to 1205°C
(1700 to 2200°F)
Thermal processing
AISI 4140 alloy steel can be hot worked at temperatures from 816 to
1038°C (1500 to 1900°F)
Cold working
AISI 4140 alloy steel can be cold worked in the annealed condition
using conventional methods.
Annealing
AISI 4140 alloy steel is annealed at 872°C (1600°F) and then slowly
cooled in a furnace.
Tempering
AISI 4140 alloy steel can be tempered at temperatures from 205 to
649°C (400 to 1200°F), depending on the desired hardness level. If
the tempering temperature is lower, the hardness of the steel can
be increased. For example, a tensile strength of 225 ksi can be
achieved by tempering at 316°C (600°F) and a tensile strength of
130 ksi can be achieved by tempering at 538°C (1000°F).
harden
AISI 4140 alloy steel can be hardened by cold working or heat
quenching.
Machinability
AISI 4140 alloy steel has good machinability in the annealed state.
Forming
AISI 4140 alloy steel has high ductility. It can be formed under
annealing conditions using conventional techniques. It requires
more pressure or force to form because it is tougher than regular
carbon steel.
welding
AISI 4140 alloy steel can be welded using all conventional
techniques. However, the mechanical properties of the steel will be
affected when welded under heat treatment, and post-weld heat
treatment should be performed.
For hot forged rolled bar, usually the delivery condition is hot
forged or rolled, annealed/QT, rough turned/Black surface.
For hot forged or hot rolled bar, usually the delivery condition is
hot rolled, annealed/QT, Black surface.
4140 bar supply size range
Hot rolled 4140 bar: Ø16mm-820mm
Forged bar: Ø260mm-1200mm
Q&T (quenching and tempering): Ø16-500mm
Cold drawn bright bar: 5mm to 120mm
The alloy steel bars of EDEST STEEL have the following main characteristics:
High strength: It has higher strength than ordinary steel.
Toughness: Suitable for applications that require impact resistance and wear resistance.
Corrosion resistance: suitable for use in harsh environments.
Wide size range: The diameter range of EDEST STEEL's alloy steel bars ranges from 20mm to 1200mm, making them suitable for various applications.
Alloy steel bars can be heat treated through processes such as annealing, normalizing, tempering, and quenching to achieve the required mechanical properties, with multiple heat treatment processes available for selection
4140 rods are widely used in many fields
Mechanical parts manufacturing: used to manufacture various mechanical parts, such as shafts, pins, gears, connecting rods, etc.
Mold manufacturing: used to manufacture die-casting molds, plastic injection molds, stamping molds, etc. to provide good wear resistance and anti-deformation properties.
Automobile manufacturing: used in the manufacture of automobile engine parts, transmission systems and steering systems
It is used to manufacture key parts such as crankshafts, connecting rods, and gear shafts to meet the automotive industry's requirements for high strength and wear resistance.
Oil and gas industry: used in the manufacture of oil and gas extraction equipment, such as drill pipes, casing, pipe connections, etc.
Aerospace: used to manufacture aerospace engine parts, landing gear components, aerospace bearings and other components requiring high strength and wear resistance.
Heavy machinery and equipment: used to manufacture various heavy machinery and equipment, such as excavators, loaders, cranes, etc. It provides sufficient strength and wear resistance to handle loads and impacts in harsh working conditions.
4140 rods are also widely used in many other industries and fields, especially in scenarios where high strength, wear resistance and impact resistance are required.
Bar customization
We are a professional alloy steel bar manufacturer and can customize bar products that meet specific needs.
Requirement confirmation: Specification requirements, including
diameter, length, material, etc. Detailed drawings or instructions
can be provided to complete customization
Material selection: according to requirements and application environment
Processing technology: customized cutting, forging, heat treatment, etc. according to customer needs
Production and manufacturing: According to customer requirements, the manufacturing, processing, molding, heat treatment and surface treatment of bars are carried out.
Quality Control: Ensure bar products comply with requirements and international standards. We will strictly inspect the bar, measure its dimensions, and test its mechanical properties, etc.
Delivery and service: After customization is completed, final
inspection and packaging will be performed, and the product will be
delivered to you according to the agreed delivery method.
EDEST provides after-sales service to ensure customer satisfaction
and long-term product use.
1. Blasting machine cleaning the steel surface
2. Fiber machine cutting the plate as the CAD drawings
3. Bending machine
4. Drill machine drill the holes.
5. Laser & Punch
6. Laser Cutting
7. Folding
8. Insert Installation
9. Fabrication
10. Assembly
EDEST STEEL CO., LTD Is A Large Comprehensive Steel Enterprise In China Specializing In The Export Of Stainless Steel And Carbon Steel. With Over 26 Years Of Experience In Production, Processing, And Sales, We Maintain Ample Stock Of Stainless Steel, Carbon Steel, And Other Steel Materials. Currently, We Have Established Six Major Production Bases Nationwide, To Provide Diversified Processing And Production Of Stainless Steel, Carbon Steel, And Other Metal Materials To Meet Your Various Procurement Needs. Our High-Quality Products Are Well-Suited For Industries Such As Energy, Manufacturing, Machinery, And Healthcare.
We Are A Leading One-Stop High-End Manufacturing Service Enterprise In China, Equipped With Capabilities In Steel Material Processing, Component Fabrication, Finished Product Manufacturing, And Professional Technical Services. We Aim To Provide Comprehensive Support To Global End-User Manufacturing Enterprises.
We Passed Certificate ISO9001,ISO14000,OHSAS18001.As A Member Of China Iron And Steel Association,We Established Long Term Friendly Cooperation With Famous Domestic Mill Plants,Such As Bao Steel,Wu Steel,An Steel,Tai Steel Etc. As Well As Active Pursues Partnerships Foreign Company ,In Order To Meet Customer Requirement. With Concept Of 'Keep Improving,Win-Win Cooperation',And Executed By Reliable Quality And After Sales Service System,Edest Steel Gained Good Reputation From Customers At Home And Abroad.We Sincerely Welcome You To Come Our Company To Negotiate Business!
Since The Establishment Of The Company, It Has Passed ISO9001/ISO14001/OHSAS18001 And Other System Certifications. MTC Will Be Shipped With The Goods When Shipped. At The Same Time, Support Third-Party Inspection.
EDEST STEEL CO.,LTD.
Address : Qianqiao Industrial Park, Huishan District, Wuxi City, Jiangsu Province
Contact Person : Mr. Jeff
Mobile/WhatsApp : +8618921116238
Email : Jeff@Edesteel.Com
Our Price May Not Be The Lowest, But We Adhere To The "Quality First, Service First" Our Price Is Reasonable, We Will Be Your Most Satisfied Supplier In China
If You Have Any Questions, Please Feel Free To Contact Us! We Are Committed To Providing You With The Best Products At The Most Reasonable Prices, Always Providing Our Best Service.
