Kyoga Flanges is a trusted manufacturer and supplier of AISI 4140 Flanges, based in Bedok, Singapore. We are committed to delivering precision-engineered flanges that meet international quality standards and demanding industry requirements. Our AISI 4140 flanges are manufactured using high-quality chromium-molybdenum alloy steel, offering excellent strength, toughness, and wear resistance. Designed for high-pressure and high-temperature service, these flanges provide reliable performance in demanding industrial environments. With a strong focus on consistent quality, timely delivery, and customer satisfaction, Kyoga Flanges serves oil & gas, petrochemical, power generation, and heavy engineering sectors.
AISI 4140 Flanges are made from a low-alloy steel containing approximately 0.40% carbon, 0.80-1.10% chromium, and 0.15-0.25% molybdenum. This composition offers excellent toughness, high tensile strength, and good fatigue resistance. Mechanically, AISI 4140 flanges have a tensile strength of 655 MPa and yield strength of 415 MPa. The advantages of AISI 4140 flanges include superior wear resistance, high strength, and good hardenability, making them ideal for high-stress applications. These flanges are widely used in automotive, aerospace, and oil & gas industries for reliable, long-lasting connections in harsh environments.
| Size Chart | 1/2″ to 48″ |
|---|---|
| Pressure Rating | Class 150, 600, 300, 1500, 900, 2500 LBS |
| Pressure Calculation in DIN | 6/ 16/ 10/ 40/ 25Bar / PN6 PN16 PN10 PN40 PN25 PN64 |
| JIS | 5K, 16 K, 10 K, 30 K, 20 K, 63 K, 40 K |
| UNI | 6/ 16/ 10/ 40/ 25Bar |
| EN | 6/ 16/ 10/ 40/ 25Bar |
| Flange Face Type | Lap-Joint Face, Large Male-Female, Raised Face, Flat Face, Small Tongue, Small Male-Female, Ring Type Joint, Large Tongue & Groove Flanges manufacturer and Supplier |
| Flanges Marking | All Flanges are marked as follows: Supplier or Manufacturer’s Name, Size, Class, Bore, Dimension, Material, Heat No. Or according to the customer’s request. |
| Element | Content |
|---|---|
| Chromium | 0.80 Tp 1.10 |
| Manganese | 0.75 Tp 1.0 |
| Silicon | 0.15 To 0.30 |
| Carbon | 0.380 To 0.430 |
| Molybdenum | 0.15 To 0.25 |
| Sulfur | 0.040 |
| Phosphorous | 0.035 |
| Iron | Balance |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 655 MPa | 95000 psi |
| Bulk modulus | 140 GPa | 20300 ksi |
| Yield strength | 415 MPa | 60200 psi |
| Shear modulus | 80 GPa | 11600 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Elongation at break (in 50 mm) | 25.70% | 25.70% |
| Hardness, Knoop | 219 | 219 |
| Hardness, Rockwell B | 92 | 92 |
| Hardness, Brinell | 197 | 197 |
| Hardness, Rockwell C | 13 | 13 |
| Machinability | 65 | 65 |
| Hardness, Vickers | 207 | 207 |
Kyoga Flanges, a leading supplier in Bedok, Bedok, offers an extensive selection of AISI 4140 Flanges, including weld neck flanges, slip-on flanges, blind flanges, threaded flanges, and lap joint flanges. Designed for diverse industrial applications, our high-quality inventory and commitment to exceptional service make us a trusted choice for flange products in the region.
AISI 4140 Flanges are widely used in applications requiring high strength and durability. They are commonly applied in oil and gas pipelines, pressure vessels, power plant equipment, and petrochemical processing systems. These flanges are also used in heavy machinery, hydraulic systems, and industrial piping exposed to high pressure and mechanical loads. Their ability to perform reliably under stress makes them ideal for structural and process applications where strength, safety, and long-term performance are critical.
Yes, we offer custom sizes for AISI 4140 Flanges to meet specific project needs. Our team at Kyoga Flanges is committed to providing tailored solutions for all your requirements. For more details, contact us at sales@www.kyogaflanges.com.
| STANDARD | UNS | WERKSTOFF NR. |
| AISI 4140 | G41400 | 1.7225 |
We are renowned for delivering products with precise, accurate dimensions. Each product undergoes thorough testing, both destructive and non-destructive, to ensure quality before being shipped to our customers.
Our team is ready to assist you. Contact us for any queries or personalized solutions.
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