ASTM A694 F42 / F52 / F60 / F65
ASTM A694 : Specifications | Grades & Standards | Product Types | Equivalent Grades | Chemical Composition | Mechanical Properties | Forged Fittings | Flanges | FAQ
ASTM A694 carbon steel Forged Fittings & Flanges – F42 CS weld neck, slip-on, threaded & blind flanges, high-strength F42 elbows, F42 pressure-rated elbows, tees & reducers, F52 forged fittings, F60 high-strength threaded fittings, F65 socket weld fittings for high-pressure piping – Manufacturer & Exporter.
Best Export Prices: sales@midlandforgefittings.com
Midland Forge and Fittings Pvt. Ltd. is a leading manufacturer and exporter of high-quality carbon steel flanges, and forged components. Specializing in ASTM, ASME, and API-certified products, the company provides precision-engineered solutions for industrial piping systems, including elbows, tees, reducers, and flanges across grades such as A694 F42/F52/F60/F65.
Advanced forging and fabrication processes ensure superior mechanical strength, durability, and corrosion resistance, meeting the most stringent international standards. Each component undergoes rigorous quality checks, including dimensional inspection and material testing, to guarantee precise performance in critical applications.
ASTM A694 F42/F52/F60/F65 are high-strength low-alloy carbon steel grades engineered for high-pressure piping systems. All grades maintain strict ASTM and ASME compliance, with controlled chemical composition for consistent hardness, ductility, impact resistance, and corrosion resistance. Advanced forging and heat treatment ensure dimensional accuracy, structural integrity, and reliability in manufacturing forged fittings, elbows, tees, reducers, crosses, and flanges, including weld neck, slip-on, threaded, and blind types.
F42 offers a minimum yield strength of 42 ksi with tensile strength typically between 60–70 ksi, providing excellent low-temperature toughness for standard high-pressure piping components.
F52 delivers a minimum yield strength of 52 ksi, optimized tensile properties, and slightly higher mechanical performance than F42, suitable for moderately high-pressure systems.
F60 provides a minimum yield strength of 60 ksi and superior tensile and toughness characteristics, making it ideal for heavy-duty industrial piping systems.
F65 is the highest-strength grade in the A694 series with a minimum yield strength of 65 ksi, designed for extremely high-pressure applications where maximum mechanical stability is required.
ASTM A694 F42 Weld Neck flange Specifications
High-strength carbon steel A694 F52 Forged Fittings– Grades & Standards
| Carbon Steel Grade | UNS No. | Applicable Standards | Typical Products |
|---|---|---|---|
| ASTM A694 F42 | K02600 | ASTM A694/A694M,
ASME B16.9, ASME B16.11, ASME B16.5, MSS-SP-97 |
Forged Fittings, Weld Neck Flanges, Slip-On Flanges, Blind Flanges, Threaded Flanges |
| ASTM A694 F52 | K02601 | ASTM A694/A694M,
ASME B16.9, ASME B16.11, ASME B16.5, MSS-SP-97 |
Forged Fittings, Weld Neck & Slip-On Flanges, Blind & Threaded Flanges |
| ASTM A694 F60 | K02602 | ASTM A694/A694M,
ASME B16.9, ASME B16.11, ASME B16.5, MSS-SP-97 |
High-Strength Pipe Fittings, Tees & Crosses, Weld Neck, Slip-On, Blind & Threaded Flanges |
| ASTM A694 F65 | K02603 | ASTM A694/A694M,
ASME B16.9, ASME B16.11, ASME B16.5, MSS-SP-97 |
High-Pressure Forged Fittings, Elbows, Tees, Reducers, Weld Neck, Slip-On, Blind & Threaded Flanges |
A694 High-strength carbon steel Products
Forged A694 F65 fittings- Equivalent Grades
| ASTM A694 Grade | UNS No. | Equivalent Grades (International) |
|---|---|---|
| F42 | K02600 | 1.0562 (DIN), P355N (EN) |
| F52 | K02601 | 1.8902 (DIN), P420N (EN) |
| F60 | K02602 | 1.8905 (DIN), P460N (EN) |
| F65 | K02603 | 1.8871 (DIN), P460QH (EN) |
A694 grade F45 Flange - Chemical Composition
| Grade | C (%) | Mn (%) | P (%) Max | S (%) Max | Si (%) | Cr (%) | Mo (%) | Ni (%) | Cu (%) |
|---|---|---|---|---|---|---|---|---|---|
| F42 | 0.20 max | 1.50 | 0.030 | 0.030 | 0.25 | 0.50 | 0.25 | 0.50 | 0.40 |
| F52 | 0.25 max | 1.50 | 0.030 | 0.030 | 0.25 | 0.50 | 0.25 | 0.50 | 0.40 |
| F60 | 0.25 max | 1.60 | 0.030 | 0.030 | 0.25 | 0.50 | 0.25 | 0.50 | 0.40 |
| F65 | 0.25 max | 1.60 | 0.030 | 0.030 | 0.25 | 0.50 | 0.25 | 0.50 | 0.40 |
ASTM A694 F60 weld neck flange - Mechanical Properties
| Grade | Minimum Yield Strength (ksi) | Minimum Tensile Strength (ksi) | Elongation (%) | Hardness (HRB / HRC) |
|---|---|---|---|---|
| F42 | 42 | 60–70 | 20 | 82–92 HRB |
| F52 | 52 | 65–75 | 20 | 85–95 HRB |
| F60 | 60 | 70–80 | 18 | 87–97 HRB |
| F65 | 65 | 75–85 | 16 | 90–100 HRB |
Pressure-Rated Carbon steel A694 F65 flanges
High-pressure A694 forged fittings - Threaded & Socket Weld Fittings
What are the key differences between F42, F52, F60, and F65?
F42: Minimum yield strength of 42 ksi; suitable for standard high-pressure piping where moderate mechanical performance is adequate.
F52: Minimum yield strength of 52 ksi; slightly higher tensile and impact strength than F42, ideal for moderately high-pressure systems.
F60: Minimum yield strength of 60 ksi; used in heavy-duty industrial pipelines where strength and durability are critical.
F65: Minimum yield strength of 65 ksi; highest strength in the series, designed for extreme high-pressure applications requiring maximum safety and reliability.
How to select the correct grade (F42/F52/F60/F65) for a project?
Assess Operating Pressure: Higher pressure = higher grade (F60/F65).
Temperature Considerations: F42 and F52 are suitable for moderate pressures; F60/F65 is ideal for elevated temperatures.
System Criticality: Critical pipelines demanding maximum safety and minimal deformation should use F65.
Compatibility: Consider existing piping standards and flange connections.
Engineers often consult mechanical and chemical properties charts to ensure code compliance and operational safety.
High-Strength & High-Pressure ASTM A694 Carbon Steel
ASTM A694 grades are designed for high-pressure service, with minimum yield strengths ranging from 42 ksi (F42) to 65 ksi (F65).
These grades offer superior mechanical performance compared to conventional carbon steels, enabling the construction of piping systems that operate under extreme pressure and stress.
High-strength features include:
Enhanced yield and tensile strength to resist permanent deformation.
Improved impact toughness to prevent brittle failure under fluctuating pressures.
Superior fatigue resistance for long-term reliability in cyclic loading conditions.
A694 fittings and flanges, including buttweld elbows, tees, reducers, and forged flanges, are precision-engineered to maintain dimensional integrity under high-pressure operation.
The combination of high strength, corrosion resistance, and ductility ensures these grades are ideal for critical industrial piping systems, where both safety and performance are non-negotiable.