4140 Alloy Steel Bar AISI 4140 Alloy Steel

Product name: Alloy steel bar
Brand: EDEST STEEL
Grade: 4140
Diameter range: 20-600mm customizable
Length: 6 meters or custom length
Cutting: Cutting, cut-to-length
Process: hot rolling, cold drawing, forging
Heat treatment process: normalizing, tempering, quenching, quenching and tempering, etc.
Supply quantity: 2,000 tons per month

4140 steel bar is a widely used alloy steel with a perfect combination of strength, toughness and hardness and good machinability
4140 can enhance its mechanical properties through heat treatment, can be quenched and tempered to various strength levels, EDEST STEEL has various diameters of 4140 Steel bars to meet market demand

4140 alloy steel bar heat treatment processing

Heat treatment process:

Annealing process: 760±10℃ annealing, furnace cooling to 400℃ air cooling, hardness: HB220-230

Normalizing process: 860±10°C normalizing, normal air cooling

Quenching + tempering process: 840±10℃ quenching or oil, 680-700 degrees tempering, hardness: HB<217

Tempering quenching + tempering: 840±10℃ quenching oil, 470 degrees tempering, hardness: HRC41-45

Quenching + tempering: 840±10℃ quenching oil, 480 degrees tempering, hardness: HRC35-45

Quenching + tempering: Quenching at 850°C, then tempering at 500°C, hardness: HRC40-43

Quenching and tempering + tempering: quenching at 860°C, then tempering at 390°C, hardness: HRC48-52

Mechanical properties of 4140 alloy steel

Tensile strength σb (MPa): ≥1080 (110)

Yield strength σs (MPa): ≥930 (95)

Elongation δ5 (%): ≥12

Area shrinkage ψ (%): ≥45

Impact energy Akv (J): ≥63

Impact toughness value αkv (J/cm2): ≥78 (8)

Hardness: ≤217HB

4140 steel bar is a high-quality alloy steel, the main components include carbon, chromium, manganese, silicon and molybdenum and other elements
It has the characteristics of high strength, high wear resistance and high toughness. It is widely used not only in the machinery manufacturing industry, but also in the fields of petroleum, automobiles, aerospace, etc.

4140 alloy steel bar stock size table

Alloy Steel Bar/Steel Bar Product Display

Machining Center

We have our own workshop, we can supply one stop service:

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,Construction,Infrastructure,Household Goods and so on.

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 strive to be your most satisfactory supplier in China. Let us start with your orders, and we will establish a good strategic partnership with you by offering the best service, highest quality products, and reasonable prices.