Manufacturer, Supplier & Exporter of AISI 4140 Round Bar
AISI 4140 Round Bar is a high-strength chromium-molybdenum alloy steel commonly known for its excellent toughness, fatigue strength, and wear resistance. It is widely used across heavy-duty industrial applications where superior mechanical properties and deep hardenability are required. Riddhi Siddhi Impex is a leading manufacturer and supplier of high-quality AISI 4140 Round Bars, delivering precision-engineered products suitable for demanding engineering applications..
Being a versatile alloy steel grade, AISI 4140 Round Bar is ideally suited for heat treatment processes such as quenching and tempering, enabling it to achieve very high tensile and yield strength. Its excellent toughness makes it a preferred choice in automotive, forging, oil & gas, power generation, and mechanical engineering sectors..
The high chromium content enhances the hardenability and corrosion resistance of AISI 4140 Round Bars, while molybdenum improves strength and reduces brittleness. This combination allows the material to perform efficiently under high stress, shock loads, and fluctuating temperatures, making it suitable for gear components, shafts, axles, crankshafts, connecting rods, and heavy machinery parts..
As a trusted supplier, Riddhi Siddhi Impex caters to a vast network of industries across major Indian domestic cities such as Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, Rajpipla, and many more locations..
The company offers customized AISI 4140 Round Bars in varying lengths, surface finishes, tolerance levels, and heat-treated conditions to meet customer-specific requirements. With advanced manufacturing facilities and stringent quality checks, every bar delivered meets international performance standards.
AISI 4140 Round Bar – Technical Details
Specification
| Specification | Details |
|---|---|
| Grade | AISI 4140 / UNS G41400 |
| Standard | ASTM A29, ASTM A322, SAE 4140 |
| Type | Round Bar / Bright Bar / Forged Bar / Hex Bar |
| Condition | Annealed, Normalized, QT (Quenched & Tempered), Hot Rolled, Cold Drawn |
| Diameter Range | 10 mm – 600 mm |
| Length | 1 Meter – 6 Meter or Custom Cut |
| Surface Finish | Black, Bright, Peeled, Turned, Polished |
Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 – 0.43 |
| Manganese (Mn) | 0.75 – 1.00 |
| Chromium (Cr) | 0.80 – 1.10 |
| Molybdenum (Mo) | 0.15 – 0.25 |
| Silicon (Si) | 0.15 – 0.30 |
| Phosphorus (P) | 0.035 max |
| Sulphur (S) | 0.040 max |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 655 – 850 MPa |
| Yield Strength | 415 MPa (min) |
| Elongation | 20% (min) |
| Hardness | 197 – 230 HB |
| Impact Strength | High toughness |
Dimension Chart
| Diameter (mm) | Weight (kg/m) |
|---|---|
| 10 | 0.62 |
| 20 | 2.47 |
| 40 | 9.86 |
| 60 | 22.20 |
| 80 | 39.50 |
| 100 | 61.70 |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | G41400 |
| Werkstoff | 1.7225 |
| DIN | 42CrMo4 |
| BS | 708M40 |
| JIS | SCM440 |
Equivalent Standards
| Standard | Description |
|---|---|
| ASTM | A29 / A322 |
| SAE | 4140 |
| DIN | EN 10083 |
| JIS | G4105 |
Other Types
| Type | Description |
|---|---|
| AISI 4130 Round Bar | Lower carbon content and used for welding applications |
| AISI 4145 Round Bar | Higher hardenability and strength |
| 42CrMo4 Round Bar | European equivalent with high fatigue strength |
| EN19 Round Bar | Popular equivalent grade in India for engineering components |
AISI 4140 Round Bars supplied by Riddhi Siddhi Impex are widely used in the oilfield sector for drill collars, tool joints, downhole tools, and other high-stress components. The grade’s exceptional fatigue resistance makes it ideal for structural parts in heavy engineering, earth-moving equipment, and power transmission systems.
Frequently Asked Questions (FAQs)
- Q1: What are the common applications of AISI 4140 Round Bar?
- A1: It is widely used in shafts, gears, crankshafts, bolts, spindles, drilling tools, and automotive components.
- Q2: Do you offer custom cut lengths?
- A2: Yes, we provide custom-length cutting as per your project requirements.
- Q3: Is AISI 4140 weldable?
- A3: Yes, but preheating and post-weld heat treatment are recommended for best results.
- Q4: Are heat treatment conditions available?
- A4: Yes, we offer AISI 4140 in annealed, normalized, and quenched & tempered conditions.
Cities we have supplied our products to
Mumbai, AISI 4140 Round Bar Suplier in Delhi, AISI 4140 Round Bar Suplier in Bengaluru(Bangalore), AISI 4140 Round Bar Suplier in Hyderabad, AISI 4140 Round Bar Suplier in Chennai, AISI 4140 Round Bar Suplier in Kolkata, AISI 4140 Round Bar Suplier in Pune, AISI 4140 Round Bar Suplier in Ahmedabad, AISI 4140 Round Bar Suplier in Surat, AISI 4140 Round Bar Suplier in Vadodara, AISI 4140 Round Bar Suplier in Rajkot, AISI 4140 Round Bar Suplier in Nagpur, AISI 4140 Round Bar Suplier in Indore, AISI 4140 Round Bar Suplier in Bhopal, AISI 4140 Round Bar Suplier in Jaipur, AISI 4140 Round Bar Suplier in Kanpur, AISI 4140 Round Bar Suplier in Lucknow, AISI 4140 Round Bar Suplier in Agra, AISI 4140 Round Bar Suplier in Varanasi, AISI 4140 Round Bar Suplier in Amritsar, AISI 4140 Round Bar Suplier in Chandigarh, AISI 4140 Round Bar Suplier in Mysuru (Mysore), AISI 4140 Round Bar Suplier in Udaipur, AISI 4140 Round Bar Suplier in Jodhpur, AISI 4140 Round Bar Suplier in Visakhapatnam, AISI 4140 Round Bar Suplier in Coimbatore, AISI 4140 Round Bar Suplier in Madurai, AISI 4140 Round Bar Suplier in Kochi, AISI 4140 Round Bar Suplier in Thiruvananthapuram, AISI 4140 Round Bar Suplier in Mangalore, AISI 4140 Round Bar Suplier in Nagpur, AISI 4140 Round Bar Suplier in Nashik, AISI 4140 Round Bar Suplier in Kolhapur, AISI 4140 Round Bar Suplier in Chandrapur, AISI 4140 Round Bar Suplier in Akola, AISI 4140 Round Bar Suplier in Vilayat, AISI 4140 Round Bar Suplier in Somnath, AISI 4140 Round Bar Suplier in Dahej, AISI 4140 Round Bar Suplier in Vadodara, AISI 4140 Round Bar Suplier in Narmada, AISI 4140 Round Bar Suplier in Surat, AISI 4140 Round Bar Suplier in Ankleshwar, AISI 4140 Round Bar Suplier in Navsari, AISI 4140 Round Bar Suplier in Valsad, AISI 4140 Round Bar Suplier in Rajpipla, AISI 4140 Round Bar Suplier in Veraval, AISI 4140 Round Bar Suplier inKovvur, AISI 4140 Round Bar Suplier in Andra Pradesh, AISI 4140 Round Bar Suplier inKarwar, AISI 4140 Round Bar Suplier in Karnataka, AISI 4140 Round Bar Suplier inKosamba, AISI 4140 Round Bar Suplier in Gujarat, AISI 4140 Round Bar Suplier in Vishakapatnam, AISI 4140 Round Bar Suplier in Shahad, AISI 4140 Round Bar Suplier in Pondicherry, AISI 4140 Round Bar Suplier in Kakkinada, AISI 4140 Round Bar Suplier in Andra Pradesh, AISI 4140 Round Bar Suplier in Nagda, AISI 4140 Round Bar Suplier in Madhya Pradesh, AISI 4140 Round Bar Suplier inHarihar, AISI 4140 Round Bar Suplier in Karnataka, AISI 4140 Round Bar Suplier in Tuticorin, AISI 4140 Round Bar Suplier in Tamilnadu, AISI 4140 Round Bar Suplier in Trivandrum, AISI 4140 Round Bar Suplier in KeralaKurnool, AISI 4140 Round Bar Suplier in Andra Pradesh, AISI 4140 Round Bar Suplier in Rourkela, AISI 4140 Round Bar Suplier in Hindupur, AISI 4140 Round Bar Suplier in Orissa, AISI 4140 Round Bar Suplier in Renukoot, AISI 4140 Round Bar Suplier in Uttar Pradesh, AISI 4140 Round Bar Suplier in Morbi, AISI 4140 Round Bar Suplier in Kerala , AISI 4140 Round Bar Suplier inHimachal, AISI 4140 Round Bar Suplier in Dehradun, AISI 4140 Round Bar Suplier in Visakhapatnam , AISI 4140 Round Bar Suplier inJamnagar, AISI 4140 Round Bar Suplier in Kozhikode, AISI 4140 Round Bar Suplier in Pondicherry, AISI 4140 Round Bar Suplier in Ludhiana, AISI 4140 Round Bar Suplier inLatur, AISI 4140 Round Bar Suplier in Nanded, AISI 4140 Round Bar Suplier in Vijaywada, AISI 4140 Round Bar Suplier in Alwar, AISI 4140 Round Bar Suplier in Bareilly, AISI 4140 Round Bar Suplier in Bikaner, AISI 4140 Round Bar Suplier in Andheri, AISI 4140 Round Bar Suplier in Marol, AISI 4140 Round Bar Suplier in Taloja, AISI 4140 Round Bar Suplier in Turbhe, AISI 4140 Round Bar Suplier in TTC (Thane-Belapur), AISI 4140 Round Bar Suplier in Pimpri-Chinchwad, AISI 4140 Round Bar Suplier in Chakan, AISI 4140 Round Bar Suplier in Talegaon, AISI 4140 Round Bar Suplier in Ranjangaon, AISI 4140 Round Bar Suplier in Jejuri, AISI 4140 Round Bar Suplier in Baramati, AISI 4140 Round Bar Suplier in Satpur, AISI 4140 Round Bar Suplier in Ambad, AISI 4140 Round Bar Suplier in Sinnar, AISI 4140 Round Bar Suplier in Igatpuri, AISI 4140 Round Bar Suplier in Shendra, AISI 4140 Round Bar Suplier in Waluj, AISI 4140 Round Bar Suplier in Chikalthana, AISI 4140 Round Bar Suplier in Paithan, AISI 4140 Round Bar Suplier in Hingna, AISI 4140 Round Bar Suplier in Butibori, AISI 4140 Round Bar Suplier in Kalmeshwar, AISI 4140 Round Bar Suplier in Umred, AISI 4140 Round Bar Suplier in Shiroli, AISI 4140 Round Bar Suplier in Kagal, AISI 4140 Round Bar Suplier in Gokul Shirgaon, AISI 4140 Round Bar Suplier in Akkalkot, AISI 4140 Round Bar Suplier in Chincholi, AISI 4140 Round Bar Suplier in Lote-Parshuram, AISI 4140 Round Bar Suplier in Dombivli, AISI 4140 Round Bar Suplier in Ambernath, AISI 4140 Round Bar Suplier in Mahad, AISI 4140 Round Bar Suplier in Roha, AISI 4140 Round Bar Suplier in Palghar, AISI 4140 Round Bar Suplier in Tarapur (Boisar) and for inder national
Countries we have supplied our products to
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