Manufacturer, Supplier & Exporter of AISI 4340 Round Bar
AISI 4340 Round Bar is one of the most versatile and high-strength alloy steel bars used for demanding engineering and industrial applications. Manufactured using premium-grade alloy steel, AISI 4340 contains nickel, chromium, and molybdenum, giving it exceptional toughness, wear resistance, and fatigue strength. Riddhi Siddhi Impex is a trusted manufacturer and supplier of AISI 4340 Round Bars in India, providing superior-quality material suitable for heavy-duty machinery, aerospace, defense, power generation, and automotive industries...
Known for its exceptional hardenability and strength in the heat-treated condition, AISI 4340 Round Bar is commonly used in components that experience high stress and shock loads. Riddhi Siddhi Impex ensures every bar undergoes strict quality inspection, including ultrasonic testing, mechanical testing, and chemical verification, making them suitable for mission-critical industries. The grade offers excellent performance in quenched and tempered conditions, providing outstanding mechanical properties compared to other alloy steel grades.
Riddhi Siddhi Impex supplies AISI 4340 Round Bars in various forms including hot rolled, forged, normalized, annealed, and quenched & tempered. These options allow customers to choose exactly the right material condition depending on the application—whether it's for high-strength shafts, gears, axles, connecting rods, spindles, or high-load bearings. Their high-quality production practices ensure superior machinability and dimensional accuracy..
AISI 4340 Round Bar is particularly preferred for aerospace and defense applications due to its high strength-to-weight ratio and ability to withstand extreme stress and temperatures. With excellent fatigue resistance, it is frequently used in aircraft landing gear components, heavy-duty shafts, crankshafts, and power transmission parts. Riddhi Siddhi Impex ensures compliance with international standards, making their 4340 bars suitable for export and defense-grade applications..
As a leading supplier in India, Riddhi Siddhi Impex has established a strong supply chain network across major domestic cities. They offer quick deliveries of AISI 4340 Round Bars in Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru, Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, and other industrial hubs.
AISI 4340 Round Bar
Specification
| Property | Details |
|---|---|
| Product | AISI 4340 Round Bar |
| Manufacturer / Supplier | Riddhi Siddhi Impex |
| Grade | AISI 4340 / UNS G43400 |
| Type | Nickel-Chromium-Molybdenum Alloy Steel |
| Forms | Round Bar, Bright Bar, Forged Bar, Hex Bar |
| Heat Treatment | Annealed, Normalized, Quenched & Tempered (QT) |
| Diameter Range | 10 mm – 600 mm (custom sizes available) |
| Length | 1 m – 6 m (cut-to-length available) |
| Surface Finish | Black, Bright, Peeled, Turned, Ground, Polished |
| Typical Applications | Shafts, gears, crankshafts, landing gear, coupling rods, heavy machinery, oil & gas components |
Chemical Composition
| Element | Typical Range / Limit (%) |
|---|---|
| Carbon (C) | 0.38 – 0.43 |
| Manganese (Mn) | 0.60 – 0.80 |
| Chromium (Cr) | 0.70 – 0.90 |
| Nickel (Ni) | 1.65 – 2.00 |
| Molybdenum (Mo) | 0.20 – 0.30 |
| Silicon (Si) | 0.15 – 0.30 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Iron (Fe) | Balance |
Mechanical Properties (Typical, heat treated)
| Property | Typical Value / Range |
|---|---|
| Tensile Strength | ≈ 930 – 1,080 MPa |
| Yield Strength (0.2% offset) | ≈ 680 – 880 MPa |
| Hardness (HB) | ≈ 217 – 285 HB (depends on tempering) |
| Elongation (A%) | ≈ 17 – 22% |
| Impact Toughness | High — excellent toughness in quenched & tempered condition |
| Modulus of Elasticity | ≈ 205 GPa |
Dimension Chart (Nominal)
| Diameter (mm) | Weight (kg/m) |
|---|---|
| 10 | 0.62 |
| 20 | 2.47 |
| 40 | 9.86 |
| 60 | 22.20 |
| 80 | 39.50 |
| 100 | 61.70 |
| 150 | 138.7 |
Equivalent Grades
| Standard / Region | Common Equivalent |
|---|---|
| UNS | G43400 |
| EN / DIN | 34CrNiMo6 (commonly referenced European equivalent) |
| Werkstoff | 1.6511 / 34CrNiMo6 |
| JIS | SNCM439 / similar high-alloy steels |
| SAE | 4340 |
Equivalent Standards
| Standard | Description |
|---|---|
| ASTM A29 / A322 | Specification for alloy steel bars, hot-wrought |
| EN 10083-3 / DIN | Steels for quenching and tempering — alloyed steel grades |
| JIS G4103 | Alloy structural steels (reference) |
Other Types / Related Alloy Steels
| Grade | Typical Use / Notes |
|---|---|
| AISI 4130 | Lower Ni content, good weldability, used where slightly lower strength acceptable |
| AISI 4140 | Popular Cr-Mo grade; slightly different hardenability/profile vs 4340 |
| AISI 4345 | Similar high-strength alloy with higher hardenability |
| EN19 / 42CrMo4 | Common European alloy steels used for shafts and forgings |
Riddhi Siddhi Impex also offers custom cutting, machining, heat treatment, and testing services to meet industry-specific requirements. Their AISI 4340 Round Bars are available in a wide range of diameters and lengths, ensuring compatibility with large-scale engineering projects. Custom sizes can be manufactured for special industrial applications..
Frequently Asked Questions (FAQs)
- Q1: What are the main applications of AISI 4340 Round Bar?
- A1: AISI 4340 is used for high-stress components such as landing gear, crankshafts, heavy shafts, gears, high-load fasteners, and critical aerospace and defense parts.
- Q2: Is AISI 4340 weldable and heat-treatable?
- A2: Yes — AISI 4340 welds acceptably with proper preheat and post-weld heat treatment. It is readily heat-treatable (quench & temper) to obtain high strength and toughness.
- Q3: Do you supply custom sizes and pre-treatments?
- A3: Yes — Riddhi Siddhi Impex supplies custom diameters, cut-to-length bars, and offers heat treatment, machining, and test documentation (MTC, PMI, hardness reports) on request.
- Q4: Which Indian cities do you supply to?
- A4: Domestic supply is available across major industrial centres including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru, Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, Rajpipla and more.
Cities we have supplied our products to
Mumbai, AISI 4340 Round BarSuplier in Delhi, AISI 4340 Round BarSuplier in Bengaluru(Bangalore), AISI 4340 Round BarSuplier in Hyderabad, AISI 4340 Round BarSuplier in Chennai, AISI 4340 Round BarSuplier in Kolkata, AISI 4340 Round BarSuplier in Pune, AISI 4340 Round BarSuplier in Ahmedabad, AISI 4340 Round BarSuplier in Surat, AISI 4340 Round BarSuplier in Vadodara, AISI 4340 Round BarSuplier in Rajkot, AISI 4340 Round BarSuplier in Nagpur, AISI 4340 Round BarSuplier in Indore, AISI 4340 Round BarSuplier in Bhopal, AISI 4340 Round BarSuplier in Jaipur, AISI 4340 Round BarSuplier in Kanpur, AISI 4340 Round BarSuplier in Lucknow, AISI 4340 Round BarSuplier in Agra, AISI 4340 Round BarSuplier in Varanasi, AISI 4340 Round BarSuplier in Amritsar, AISI 4340 Round BarSuplier in Chandigarh, AISI 4340 Round BarSuplier in Mysuru (Mysore), AISI 4340 Round BarSuplier in Udaipur, AISI 4340 Round BarSuplier in Jodhpur, AISI 4340 Round BarSuplier in Visakhapatnam, AISI 4340 Round BarSuplier in Coimbatore, AISI 4340 Round BarSuplier in Madurai, AISI 4340 Round BarSuplier in Kochi, AISI 4340 Round BarSuplier in Thiruvananthapuram, AISI 4340 Round BarSuplier in Mangalore, AISI 4340 Round BarSuplier in Nagpur, AISI 4340 Round BarSuplier in Nashik, AISI 4340 Round BarSuplier in Kolhapur, AISI 4340 Round BarSuplier in Chandrapur, AISI 4340 Round BarSuplier in Akola, AISI 4340 Round BarSuplier in Vilayat, AISI 4340 Round BarSuplier in Somnath, AISI 4340 Round BarSuplier in Dahej, AISI 4340 Round BarSuplier in Vadodara, AISI 4340 Round BarSuplier in Narmada, AISI 4340 Round BarSuplier in Surat, AISI 4340 Round BarSuplier in Ankleshwar, AISI 4340 Round BarSuplier in Navsari, AISI 4340 Round BarSuplier in Valsad, AISI 4340 Round BarSuplier in Rajpipla, AISI 4340 Round BarSuplier in Veraval, AISI 4340 Round BarSuplier inKovvur, AISI 4340 Round BarSuplier in Andra Pradesh, AISI 4340 Round BarSuplier inKarwar, AISI 4340 Round BarSuplier in Karnataka, AISI 4340 Round BarSuplier inKosamba, AISI 4340 Round BarSuplier in Gujarat, AISI 4340 Round BarSuplier in Vishakapatnam, AISI 4340 Round BarSuplier in Shahad, AISI 4340 Round BarSuplier in Pondicherry, AISI 4340 Round BarSuplier in Kakkinada, AISI 4340 Round BarSuplier in Andra Pradesh, AISI 4340 Round BarSuplier in Nagda, AISI 4340 Round BarSuplier in Madhya Pradesh, AISI 4340 Round BarSuplier inHarihar, AISI 4340 Round BarSuplier in Karnataka, AISI 4340 Round BarSuplier in Tuticorin, AISI 4340 Round BarSuplier in Tamilnadu, AISI 4340 Round BarSuplier in Trivandrum, AISI 4340 Round BarSuplier in KeralaKurnool, AISI 4340 Round BarSuplier in Andra Pradesh, AISI 4340 Round BarSuplier in Rourkela, AISI 4340 Round BarSuplier in Hindupur, AISI 4340 Round BarSuplier in Orissa, AISI 4340 Round BarSuplier in Renukoot, AISI 4340 Round BarSuplier in Uttar Pradesh, AISI 4340 Round BarSuplier in Morbi, AISI 4340 Round BarSuplier in Kerala , AISI 4340 Round BarSuplier inHimachal, AISI 4340 Round BarSuplier in Dehradun, AISI 4340 Round BarSuplier in Visakhapatnam , AISI 4340 Round BarSuplier inJamnagar, AISI 4340 Round BarSuplier in Kozhikode, AISI 4340 Round BarSuplier in Pondicherry, AISI 4340 Round BarSuplier in Ludhiana, AISI 4340 Round BarSuplier inLatur, AISI 4340 Round BarSuplier in Nanded, AISI 4340 Round BarSuplier in Vijaywada, AISI 4340 Round BarSuplier in Alwar, AISI 4340 Round BarSuplier in Bareilly, AISI 4340 Round BarSuplier in Bikaner, AISI 4340 Round BarSuplier in Andheri, AISI 4340 Round BarSuplier in Marol, AISI 4340 Round BarSuplier in Taloja, AISI 4340 Round BarSuplier in Turbhe, AISI 4340 Round BarSuplier in TTC (Thane-Belapur), AISI 4340 Round BarSuplier in Pimpri-Chinchwad, AISI 4340 Round BarSuplier in Chakan, AISI 4340 Round BarSuplier in Talegaon, AISI 4340 Round BarSuplier in Ranjangaon, AISI 4340 Round BarSuplier in Jejuri, AISI 4340 Round BarSuplier in Baramati, AISI 4340 Round BarSuplier in Satpur, AISI 4340 Round BarSuplier in Ambad, AISI 4340 Round BarSuplier in Sinnar, AISI 4340 Round BarSuplier in Igatpuri, AISI 4340 Round BarSuplier in Shendra, AISI 4340 Round BarSuplier in Waluj, AISI 4340 Round BarSuplier in Chikalthana, AISI 4340 Round BarSuplier in Paithan, AISI 4340 Round BarSuplier in Hingna, AISI 4340 Round BarSuplier in Butibori, AISI 4340 Round BarSuplier in Kalmeshwar, AISI 4340 Round BarSuplier in Umred, AISI 4340 Round BarSuplier in Shiroli, AISI 4340 Round BarSuplier in Kagal, AISI 4340 Round BarSuplier in Gokul Shirgaon, AISI 4340 Round BarSuplier in Akkalkot, AISI 4340 Round BarSuplier in Chincholi, AISI 4340 Round BarSuplier in Lote-Parshuram, AISI 4340 Round BarSuplier in Dombivli, AISI 4340 Round BarSuplier in Ambernath, AISI 4340 Round BarSuplier in Mahad, AISI 4340 Round BarSuplier in Roha, AISI 4340 Round BarSuplier in Palghar, AISI 4340 Round BarSuplier in Tarapur (Boisar) and for inder national
Countries we have supplied our products to
South Korea, AISI 4340 Round BarExporter in Africa, AISI 4340 Round BarExporter in Sri Lanka, AISI 4340 Round BarExporter in Syria, AISI 4340 Round BarExporter in Taiwan, AISI 4340 Round BarExporter in Tanzania, AISI 4340 Round BarExporter in Tajikistan, AISI 4340 Round BarExporter in Thailand, AISI 4340 Round BarExporter in Turkey, AISI 4340 Round BarExporter in Turkmenistan, AISI 4340 Round BarExporter in Ukraine, AISI 4340 Round BarExporter in United Kingdom, AISI 4340 Round BarExporter in Arab Emirates (UAE), AISI 4340 Round BarExporter in Uzbekistan, AISI 4340 Round BarExporter in Vietnam, AISI 4340 Round BarExporter in Yemen, AISI 4340 Round BarExporter in France, AISI 4340 Round BarExporter in Germany, AISI 4340 Round BarExporter in Greece, AISI 4340 Round BarExporter in Oman, AISI 4340 Round BarExporter in Colombia, AISI 4340 Round BarExporter in Portugal, AISI 4340 Round BarExporter in Japan, AISI 4340 Round BarExporter in Lithuania, AISI 4340 Round BarExporter in Macau, AISI 4340 Round BarExporter in Mongolia, AISI 4340 Round BarExporter in Qatar, AISI 4340 Round BarExporter in Ireland, AISI 4340 Round BarExporter in Malaysia, AISI 4340 Round BarExporter in Bangladesh, AISI 4340 Round BarExporter in Russia, AISI 4340 Round BarExporter in Iran, AISI 4340 Round BarExporter in Jordan, AISI 4340 Round BarExporter in Singapore, AISI 4340 Round BarExporter in Bulgaria, AISI 4340 Round BarExporter in Poland, AISI 4340 Round BarExporter in Denmark, AISI 4340 Round BarExporter in Nigeria, AISI 4340 Round BarExporter in Gambia, AISI 4340 Round BarExporter in Indonesia, AISI 4340 Round BarExporter in Finland, AISI 4340 Round BarExporter in Argentina, AISI 4340 Round BarExporter in Chile, AISI 4340 Round BarExporter in Spain, AISI 4340 Round BarExporter in Peru, AISI 4340 Round BarExporter in Kuwait, AISI 4340 Round BarExporter in India, AISI 4340 Round BarExporter in Saudi Arabia, AISI 4340 Round BarExporter in Slovakia, AISI 4340 Round BarExporter in Slovenia, AISI 4340 Round BarExporter in Sweden, AISI 4340 Round BarExporter in Switzerland, AISI 4340 Round BarExporter in Bahrain, AISI 4340 Round BarExporter in the Netherlands, AISI 4340 Round BarExporter in United Kingdom, AISI 4340 Round BarExporter in Mexico, AISI 4340 Round BarExporter in Bulgaria, AISI 4340 Round BarExporter in Spain, AISI 4340 Round BarExporter in France, AISI 4340 Round BarExporter in Germany, AISI 4340 Round BarExporter in Colombia, AISI 4340 Round BarExporter in Brazil, AISI 4340 Round BarExporter in Saudi Arabia, AISI 4340 Round BarExporter in Iraq, AISI 4340 Round BarExporter in Iran, AISI 4340 Round BarExporter in Sudan, AISI 4340 Round BarExporter in Libya, AISI 4340 Round BarExporter in Tanzania, AISI 4340 Round BarExporter in Nigeria, AISI 4340 Round BarExporter in New Zealand, AISI 4340 Round BarExporter in Paris, AISI 4340 Round BarExporter in Switzerland
