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Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140

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Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140

Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140
Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140 Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140 Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140

Large Image :  Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140

Product Details:
Place of Origin: MAINLAND CHINA
Brand Name: UST
Certification: ISO 9001:2008
Model Number: ASTM 4140
Payment & Shipping Terms:
Minimum Order Quantity: 3 Metric tons
Price: USD 800-2000 / Metric Ton
Packaging Details: In standard export packing and seaworthy material with rectangular shape bundle, covered with tarpaulin, in ontainers or in bulk, or upon request
Delivery Time: 15-35 days
Payment Terms: L/C, T/T, D/A, D/P
Supply Ability: 1000 Metric Tons per Month
Detailed Product Description
Matrial: Alloy Steel Standard: GB, ASTM, DIN,JIS
Grade: 4140 (G41400) Diameter: 12-320mm
Length: Below 16 Meters Shape: Round Bar
Techniques: Cold Drawn; Hot Rolled; Cold Rolled; Forged Surface: Black, Bright, Polished, Peeled, Or Upon Request
Ultrasonic Test: 100% UT Passed Processing: Annealed Or Quenched And Tempered Provided
End: Beveled, Plain End As Required Quality Inspection: SGS, BV Etc.
Service: Cutting Service And 3rd Party Inspection Is Provided
High Light:

alloy steel round bar

,

spring steel round bar

,

hot rolled round bar

AISI / SAE 4140 Hot Rolled Alloy High Tensile Steel Bar / Rod 12-320mm

 

INTRODUCTION

 

Alloy Steel 4140, also sold under the name AISI/SAE 4140, is a low alloy steel that contains chromium, molybdenum, and manganese. Known for its impact and abrasion resistance, Alloy Steel 4140 also offers users outstanding fatigue and torsional strength. Welding is possible through most popular techniques, and it has a high level of ductility. Machinability is possible in the annealed condition, while Alloy Steel 4140 takes cold working, heating, and quenching well.

 

APPLICATIONS

 

Due to its toughness and other positive characteristics, Alloy Steel 4140 is found in a wide variety of applications such as:

  • Axle shafts
  • Bolts
  • Crankshafts
  • Hydraulics
  • Torsion bars
  • Tool Holders
SUPPLY RANGE OF ALLOY 4140
 

-Dimension: Diameter 4-1600 mm, any length below 16 meters

-Delivery Conditions:

Cold drawn: 4-100 mm

Peeled: 30-160 mm

Grinded: 4- 600 mm

Turned: 130-1200 mm

Hot rolled: 12-320 mm

Hot forged: 130-1600 mm

-EAF+(ESR) or EAF+LF+VD+(ESR)

-HOT rolled; Cold rolled; Forged; Cold Drawn

-Heat Treatment: Untreated, Annealing, N+T, Q+T

-Smelting: EAF+LF+VD (+ESR)

-Surface Finish: Black, Rough Machined, Peeled, Turned or upon request

-UT 100% passed

-Cutting service provided

-Third Party inspection is acceptable (SGS, BV etc.)

 

Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140 0

COMMON 4140 STEEL EQUIVALENCY

 

Country USA German British Japan China Australia
Standard ASTM A29 DIN 17200 BS 970 JIS G4105 GB/T 3077 AS 1444
Grades 4140 1.7225/
42crmo4
42CrMo4 SCM440 42CrMo 4140

 

 

4140 STEEL BAR CHEMICAL COMPOSITION

 

Standard Grade C Mn P S Si Cr Mo
ASTM A29 4140 0.38-0.43 0.75-1.00 0.035 0.040 0.15-0.35 0.8-1.10 0.15-0.25
EN 10250 42CrMo4/
1.7224
0.38-0.45 0.6-0.9 0.035 0.035 0.4 0.9-1.2 0.15-0.30
JIS G4105 SCM440 0.38-0.43 0.60-0.85 0.03 0.03 0.15-0.35 0.9-1.2 0.15-0.30

 

 

MECHANICAL PROPERTIES OF AISI ALLOY 4140 STEEL BAR

 

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

 

 

Machining


AISI 4140 has good machinability. Operations such as turning, hobbing, drilling, sawing, broaching, tapping and milling can be easily performed using the recommendations provided by the machine's manufacturer for ideal tool type-feeds and speeds. AISI 4140 has the following properties:

 

  • Machinability rating at 66% of B1112
  • Average cutting speed of 110 ft/min.

 

Weldability


AISI 4140 is difficult to weld, but welding can be performed using any of the common welding practices. Welding can be done by preheating the section and ensuring that stress relieving takes place after welding. It is basically recommended that welding of AISI 4140 steel in the hardened and tempered condition should be avoided as it changes the mechanical properties within the weld heat affected zone. Likewise welding in the nitrided, flame or induction hardened condition is not recommended. However welding of AISI 4140 chrome-molybdenum steel in the annealed condition is widely preferred. In case welding in the hardened and tempered condition is required, the workpiece must be cooled instantly and the stress is relieved at 15°C below the original tempering temperature.

 

When welding AISI 4140 steel (in any condition) only low hydrogen electrodes should be used.

 

Follwoing welding, the maximum cooling rate that should be employed is 95°C /hr down to 95°C. This should be followed by cooling in still air. The cooling rate can be slowed by wrapping the work piece in a heat resistant blanket or burying it in sand.

 

Heat Treatment


There are various heat treatments of the AISI 4140 Chrome-Molybdenum High Tensile Steel which are: Forging; Stress relieving; Annealing; Normalizing; Nitriding; Tempering; Flame and induction hardening; Hardening.
 

Forging
Can be heated to 1150°C and maintained until uniform
Minimum forging temperature 850°C
Can be cooled slowly in sand or ash

 

Stress Relieving
Hardened: Heat to 500°C – 550°C
Annealed: Heat to 600°C – 650°C
Cool in still air

 

Annealing
Heat to 830°C – 850°C
Furnace cool

 

Normalizing

  • Heat to 870°C – 900°C
  • Cool in still air
     

Nitriding

  • Heat to 500°C – 530°C and hold for sufficient time to develop the depth of case required
  • Parts should be pre-hardened and tempered as required and also pre-machined leaving a small grinding allowance only.
     

Tempering

  • Heat to 450°C – 700°C cool in still air
  • Tempering in the range of 200°C – 420°C causes temper brittleness and should be avoided

 

Flame and Induction Hardening

All materials consisting of de-carburized surfaces should be removed to ensure best results.

  • Heat quickly to the required case depth at 860°C – 890°C and soak instantly in water or oil
  • Tempering at 150°C – 200°C helps reduce stresses in the case with marginal effect on its hardness
     

Hardening

  • Heat to 830°C – 880°C
  • Soak in oil or polymer

 

What we can offer?

-We offer a wide range of steel products in a wide variety of dimensions and executions, according to the common international specifications or customize.

-Machining and heat treatment are available.

-Also, we advise you in choosing the right materials.

 

Shape Available

  • Solid round bar
  • Flat bar
  • Square bar
  • Hexagon bar
  • Block
  • Plate
  • Sheet
  • Wire rod
  • Strip

 

Our Advantages

  • High mechanical property and quenching, enable the surface share equal hardness after deal with it
  • Good polishing and low roughness
  • Making the heat-treatment to harden condition before using it
  • Competitive price
  • Fast production lead-time
  • All the material are inspected with 3 times to meet the highly standards
  • Pure steel quality & stable quality to be guarantee
 

OUR MAIN PRODUCTS ARE LISTED AS BELOW

 

Alloy High Tensile Hot Rolled Steel Bar Round Shape 12 - 320mm AISI / SAE 4140 1

 

Notes:

Available Size:
-Round: Dia. 4-1600 mm
-Flat: T. 10-120 mm x W. 60-810 mm
-Block: T. 80-1200 mm x W. 100-1600 mm

 

PAYMENT AND SHIPPING

 

1. Both T/T and L/C will be acceptable

2. Trade Terms: FOB, CIF, CFR

3. The delivery will be in 10-15 days if have stock; For customized items, the delivery will be negotiated by both parties

4. Shipping by sea freight from Shanghai Port (PRC) for Bulk orders, by airfreight or express for samples

 

COMPANY INFORMATION

 

Shanghai Unite Steel Trading Co., Ltd

We are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china.

What’s more, we have built long, deep and close business relationship with dozens of steel company, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!

 

FAQ

 

Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and trading company. We specialized in special steel which include alloy structural steel and carbon steel and stainless steel, etc. All material are with high quality and competitive price.

Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party, such as TUV, CE, if you need. Secondly, we have a complete set of inspection system and every process is checked by QC. Quality is the lifeline of enterprise survival.

Q: Delivery time?
A: We have ready stock for most of material grades in our warehouse. If the material doesn't have stock, the delivery lead time is about 5-30 days after receiving your prepayment or firm order.

Q: What is the payment term?
A: T/T or L/C.

Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you come to China and arrange our driver to our airport to pick you up when you come.

 

 

Contact Details
SHANGHAI UNITE STEEL

Contact Person: Eric

Tel: 13661534998

Send your inquiry directly to us (0 / 3000)

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