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SAE 4340 | AISI 4340 
SAE 4340 Round Bar Supplier | AISI 4340 Forged Round Bars | SAE 4340 Alloy Steel Round Bars | SAE 4340 Case Hardening Steel | SAE 4340 Bright Bars

The SAE 4340 material properties are high tensile strength and high hardness. SAE 4340 equivalent grade is AISI 4340. AISI 4340 material comes under alloy steel of grades of steel. SAE 4340 has good machinability and hence it is used to make nuts, bolts, gears, shafts, crankshafts, etc. Buy AISI 4340 online from National Steel Industries.

 

National Steel Industries provides AISI 4340 round bars, forged bars, bright bars and other sizes of premium quality. Ready stock material of SAE 4340 in sizes 20mm to 190mm dia. Round bar supplier of AISI 4340 for over two decades. We are one of the most trusted manufacturer and exporter of SAE 4340 grade steel Bars.​

National Steel Industries is the most prominent supplier of SAE 4340 steel. Buy good quality SAE 4340 round bars and SAE 4340 flat bars from us which are tested for a variety of parameters and delivered with a material test certificate for complete quality assurance. National Steel Industries exports high quality round bars to 6 continents.

​AISI 4340 | SAE 4340  SAE 4340 Round Bar Supplier | AISI 4340 Forged Round Bars | SAE 4340 Alloy Steel Round Bars | SAE 4340 Case Hardening Steel

SAE 4340 Chemical Composition

AISI 4340 carbon content is from 0.38-0.43 %. The material contains ​P and S as 0.035 % and 0.040 % max. The metal contains high manganese, chromium, and nickel which contributes to the high hardness of the material. Due to high Nickel content, the material can undergo heat treatments at high temperatures.

Chemical Composition of AISI 4340

 

Element %Composition

C%:   0.38/0.43 

Mn%:    0.60/0.80 
P %:    0.035 max
S %:    0.040 max
Si%:    0.20/0.35 
Ni%:    1.65/2.00 
Cr%:    0.70/0.90 
Mo%:    0.20/0.30 

SAE 4340 Mechanical Properties

AISI 4340 mechanical properties are high tensile strength and high hardness. ​Annealing can increase the material's tensile strength. SAE 4340 has corrosion resistance property due to nickel content.

 

Property    Value


Tensile Strength  850-1000 N/mm²

Hardness 250-350 HB

Elongation 13%

SAE 4340 Heat Treatments

  • Forging or hot rolling

  • Normalizing

  • Soft annealing 

  • Core hardening

  • Intermediate annealing

  • Case hardening

  • Tempering

  • Carburising

National Steel Industries is one of the biggest suppliers, exporters, and stockists of AISI 4340 material.

Buy SAE 4340 at the best price from us which is tested for a variety of parameters and delivered with a material test certificate for complete quality assurance.

AISI 4340 | SAE 4340 PRODUCTS

AISI 4340 | SAE 4340 Round Bar | AISI 4340 | SAE 4340 Alloy Steel Round Bar | National Steel Industries | India | Mumbai

SAE 4340 Round Bar |AISI 4340 Alloy Steel Round Bar

​AISI 4340 | SAE 4340 Flat Bars | AISI 4340 | SAE 4340 Alloy Steel Flat Bars | National Steel Industries | India | Mumbai

SAE 4340 Flat Bars |AISI 4340 Alloy Steel Flat Bars

​AISI 4340 | SAE 4340 Forged Round Bars | AISI 4340 | SAE 4340 Alloy Steel Forged Round Bars | National Steel Industries | India

SAE 4340 Forged Round Bars | AISI 4340 Alloy Steel Round Bars

Forged Blocks AISI 4340 | SAE 4340 | AISI 4340 | SAE 4340 Forged Blocks | national steel Industries | India

SAE 4340 Forged Blocks|AISI 4340 Alloy Steel Forged Blocks

AISI 4340 | SAE 4340 Bright Round Bars | AISI 4340 | SAE 4340 Alloy Steel Bright Bars | National Steel Industries | India | Mumbai

SAE 4340 Bright Round Bars|AISI 4340 Alloy Steel Bright Bars

​AISI 4340 | SAE 4340 Billets | AISI 4340 | SAE 4340 Alloy Steel Billets | National Steel Industries | India | Mumbai

SAE 4340 Billets | AISI 4340 Alloy Steel Billets

LENGTHS OF ROUND BARS

Standard Length Bars are available in Sizes:
 

3m

6m

12m

The Length can be cut and customized as per the customer's requirements.

Sizes  national Steel Industries  India  Mumbai.png

Round Bars Size

Product Name 

  
SAE 4340 Hot Rolled Round Bars    

SAE 4340 Cold Rolled and Cold Drawn Round bars  
SAE 4340 Peeled Round Bars    

SAE 4340 Ground Round Bars    

SAE 4340 Polished Round Bars    

SAE 4340 Turned Round Bars    

SAE 4340 Forged Bars    

SAE 4340 Proof Machine Bars    

        Size


16mm dia to 250mm dia
3mm dia to 100mm dia
3mm dia to 65mm dia
3mm dia to 65mm dia
3mm dia to 65mm dia
10mm dia to 1200mm dia
30mm dia to 1500mm dia
30mm dia to 1500mm dia

Square Bars Size

Product Name 

SAE 4340 Hot Rolled Square Bars    
SAE 4340 Cold Drawn Square Bars

SAE 4340 Peeled Square Bars   
SAE 4340 Ground Square Bars    
SAE 4340 Polished Square Bars    
SAE 4340 Forged Square Bars    
SAE 4340 Proof Machine Bars   

        Size

10mm Square to 200mm Square
10mm Square to 80mm Square
5mm Square to 80mm Square
5mm Square to 80mm Square
5mm Square to 50mm Square
30mm Square to 1500mm Square
30mm Square to 1500mm Square

AISI 4340 | SAE 4340 APPLICATIONS

SAE 4340 material is used to make shafts, crankshafts, rollers, axles, gears, bolts, nuts, gun barrels, missile components, ordnance, etc. It has high tensile strength and high hardness. AISI 4340 is easily machinable and hence it is used to make machine parts. SAE 4340 is used in industries such as the Railway industry, automobile industry, aircraft industry, iron, and steel industry, civil industry, etc. AISI 4340 can be applied with Heat Treatments such as normalization, quenching, annealing, etc.

Uses of SAE 4340 Round Bars
Uses of SAE 4340 Round Bars
Uses of SAE 4340 Round Bars
Uses of SAE 4340 Round Bars
Uses of SAE 4340 Round Bars

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National Steel Industries is one of the biggest suppliers, exporters, and stockists of AISI 4340 | SAE 4340 material at the best price. 

At Your service in

We are the leading supplier of SAE 4340 round bar supplier in  Mumbai,  Delhi, Bangalore, Hyderabad, Ahmedabad, Chennai, Kolkata, Surat, Pune, Jaipur, Lucknow, Kanpur, Nagpur, Indore, Thane, Bhopal, Visakhapatnam, Pimpri, Chinchwad, Patna, Vadodara, Ghaziabad, Ludhiana, Agra, Nashik, Ranchi, Faridabad, Meerut, Rajkot, Kalyan, Dombivali, Vasai, Virar, Varanasi, Aurangabad, Dhanbad, Amritsar, Navi Mumbai, Allahabad, Howrah, Gwalior, Jabalpur, Coimbatore, Vijayawada, Jodhpur, Madurai, Raipur, Kota, Chandigarh, Guwahati, Solapur, Hubli, Dharwad, Mysore, Tiruchirappalli, Gurgaon, Bhubaneswar, Salem, Warangal, Mira, Bhayandar, Jalgaon, Guntur, Thiruvananthapuram, Bhiwandi, Saharanpur, Amravati, Noida, Jamshedpur, Bhilai, Cuttack, Firozabad, Kochi, NelloreBhavnagar, Dehradun, Durgapur, Asansol, Rourkela, Nanded, Kolhapur, Ajmer, Akola, Gulbarga, Jamnagar, Ujjain, Loni, Siliguri, Jhansi, Ulhasnagar, Sangli, Miraj, Kupwad, Mangalore, Kurnooi, Ambattur, Rajahmundry, Tirunelveli, Malegaon, Gaya, Udaipur, Kakinada, Muzaffarnagar, Bhatpara, Panihati, Latur, Dhule, Rohtak, Sagar, Korba, Bhilwara, Berhampur, Muzaffarpur, Ahmednagar, Kollam, Avadi, Kadapa, Anantapuram, Kamarhati, Bilaspur, Sambalpur, Shahjahanpur, Satara, Bijapur, Rampur, Shimoga, Chandrapur, Junagadh, Thrissur, Alwar, Bardhaman, Kulti, Nizamabad, Parbhani, Tumkur, Khammam, Uzhavarkarai, Bihar, Panipat, Darbhanga, Bally, Aizawl, Dewas, Ichalkaranji, Karnal, Bathinda, Jalna, Eluru, Barasat, Kirari, SulemanNagar, Purnia, Satna, Mau, Sonipat, Farrukhabad, Durg, Imphal, Ratlam, Hapur, Arrah, Anantapur, Karimnagar, Etawah, Ambarnath, Bharatpur, Begusarai, NewDelhi, Gandhidham, Baranagar, Tiruvottiyur, Pondicherry, Katni, Secunderabad, Naihati, Yamunanagar, Bidhannagar, Pallavaram, Bidar, Munger, Panchkula, Burhanpur, RaurkelaIndustrialTownship, Kharagpur, Dindigul, Gandhinagar, Hospet, NangloiJat, Malda, Ongole, Deoghar, Chapra, Haldia, Khandwa, Nandyal, Morena, Amroha, Anand, Bhind, Bhalswa, Jahangir, Pur, Madhy, amgram, Bhiwani, Berhampore, Ambala, Morbi, Fatehpur, Raebareli, , Khora, , Ghaziabad, Chittoor, Bhusawal, Orai, Vellore, Mehsana, Raiganj, Sirsa, Danapur, Serampore, Sultan, Pur, Majra, Guna, Jaunpur, Panvel, Shivpuri, Surendranagar, Dudhrej, Unnao, Chinsurah, Alappuzha, Kottayam, Machilipatnam, Shimla, Adoni, Udupi, Katihar, Proddatur, Mahbubnagar, Saharsa, Dibrugarh, Jorhat, Hazaribagh, Hindupur, Nagaon, Sasaram, Hajipur.

We are the leading supplier of SAE 4340 round bar supplier in 

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AISI 4340 | SAE 4340 PRODUCTS

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National Steel Industries provides the best price and best quality for AISI 4340 | SAE 4340 round bars.