ASTM A694 F42 High Yield Carbon Steel Pipeline Flanges Manufacturer & Supplier
Metinox Overseas is a leading ASTM A694 F42 High Yield Carbon Steel Flanges manufacturer and supplier that are designed to be used in high pressure transmission methods in oil and gas pipelines and wellhead equipment and other applications that require high pressure and efficiency. We use high-yield carbon steel with controlled chemical composition to manufacture ASME SA694 F42 Forged Flanges, to achieve the minimum yield strength (290 MPa, 42 ksi) and tensile strength (415-585 MPa, 60-85 ksi) to be consistent with API 5L X42 line pipe and ASTM A860 WPHY42 pipe fittings. The purpose of these High Yield A694 F42 Flanges is specifically intended to be used in the transmission systems of the pipeline, wellhead and Christmas tree manifolds, piping of high pressure, and also in heavy duty where high mechanical properties are required instead of using A105 carbon steel.
This process of heat treatment which is mandatory- normalizing, normalizing and tempering or quenching and tempering, provides uniform microstructure, increased toughness and dependability of its performance at high pressure cyclic loads. Our ASMT A694 F42 Weld Neck Flanges, Slip-On Flanges, Blind Flanges and Threaded Flanges are produced in full fullness of ANSI/ASME B16.5 (1/2 to 24 inch NB), ASME B16.47 Series A and B (26 to 60 inch NB) and MSS SP-44 dimensional standards, in pressure classes of 150# to 2500#. All flanges are rigorously tested in terms of quality such as dimension inspection, PMI verification, tensile testing, hardness testing, and ultrasonic inspection under the standards of ASTM A961, with total traceability and adherence to API, ASME, and NACE standards.
Table of Contents
- ASTM A694 F42 Flanges Technical Specifications
- ASTM A694 F42 Equivalent Grades
- ASTM A694 F42 Chemical Composition
- Mechanical Properties of ASTM A694 F42 Flanges
- ASTM A694 F42 Flange Dimensions & Pressure Rating Chart
- Types of ASTM A694 F42 Flanges Available
- Standard Flange Sizes & Weight Chart
- Is ASTM A694 F42 Good Quality for Pipeline Applications?
- Heat Treatment & Testing Requirements
- ASTM A694 F42 High Yield Flanges Price List 2026
- Applications of ASTM A694 F42 Flanges in Industry
- Why Choose ASTM A694 F42 Flanges from Metinox Overseas?
- ASTM A694 F42 Flange Delivery Time & CIF Pricing by Country
- Other Types of High Yield A694 F42 Flanges
- Popular Locations Where We Supply ASTM A694 F42 Flanges
- Frequently Asked Questions (FAQ)
ASTM A694 F42 Flanges Technical Specifications
| Feature | Details |
| Specifications | ASTM A694 / ASME SA694 / MSS SP-44 |
| Grade | F42 (42 ksi minimum yield strength) |
| Dimensional Standards | ANSI/ASME B16.5, B16.47 Series A & B, MSS SP-44, API 6A |
| Size Range | 1/2" (15 NB) to 60" (1500 NB) |
| Pressure Class | 150#, 300#, 400#, 600#, 900#, 1500#, 2500# (B16.5); 75#, 150#, 300#, 400#, 600#, 900# (B16.47) |
| Material Type | High Yield Carbon Steel / HSLA Steel |
| Matching Pipe Grade | API 5L X42, ASTM A53 Grade B, ASTM A106 Grade B |
| Matching Fittings | ASTM A860 WPHY42, MSS SP-75 |
| Flange Types | Weld Neck, Slip-On, Blind, Socket Weld, Lap Joint, Threaded, Orifice, Long Weld Neck |
| Flange Face | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Male & Female, Tongue & Groove |
| Manufacturing Type | Hot Forged (not machined from plate or bar stock) |
| Heat Treatment | Normalized, Normalized & Tempered, or Quenched & Tempered (Mandatory) |
| Testing | Tensile Test, Hardness Test, PMI Test, Ultrasonic Test, Hydrostatic Test |
| Inspection | Third Party Inspection by TUV, SGS, Bureau Veritas, Lloyd's, DNV GL, BV, ABS |
| Certifications | EN 10204 3.1B MTC, NACE MR0175, PED 2014/68/EU, CE Marked, API 6A, ASME B31.3, B31.4, B31.8 |
ASTM A694 F42 Equivalent Grades
| Standard | USA | Europe | Japan | China | API |
| A694 F42 | ASTM A694 F42 ASME SA694 F42 | - | - | - | API 5L X42 PSL 1 / PSL 2 |
Note: A694 F42 is designed to match API 5L X42 line pipe grade with equivalent mechanical properties for pipeline system compatibility.
ASTM A694 F42 Chemical Composition
The detailed composition of this material is given in the following table.
| Element | Composition (%) | Function |
| Carbon (C) | As agreed (typically 0.24 max) | Controlled for strength and weldability |
| Manganese (Mn) | As agreed (typically 0.90-1.50) | Strength, toughness, deoxidation |
| Phosphorus (P) | 0.035 max | Controlled for ductility and toughness |
| Sulfur (S) | 0.035 max | Minimized to prevent hot cracking |
| Silicon (Si) | As agreed (typically 0.15-0.40) | Deoxidizer, strength enhancement |
| Copper (Cu) | Reported if present | Optional alloying element |
| Nickel (Ni) | Reported if present | Toughness enhancement |
| Chromium (Cr) | Reported if present | Corrosion resistance |
| Molybdenum (Mo) | Reported if present | High-temperature strength |
| Vanadium (V) | Reported if present | Grain refinement |
| Niobium (Nb) | Reported if present | Grain refinement, strength |
| Boron (B) | Reported if present | Hardenability |
Note: Chemical composition is agreed between manufacturer and purchaser. Alloying elements Cu, Ni, Cr, Mo, V, Nb, and B shall be reported if present. Carbon Equivalent (CE) may be specified: CE = C + Mn/6 + (Cr+Mo+V)/5 + (Cu+Ni)/15.
Mechanical Properties of ASTM A694 F42 Flanges
The mechanical properties decide the shelflife of the material. The table below gives the information about the mechanical properties of ASTM A694 F42 Flanges.
| Property | Requirement | Testing Standard |
| Tensile Strength | 415-585 MPa (60-85 ksi) | ASTM A370 |
| Yield Strength (0.2% offset) | 290 MPa (42 ksi) minimum | ASTM A370 |
| Elongation in 2" | 22% minimum | ASTM A370 |
| Reduction of Area | Not specified | ASTM A370 |
| Hardness (Brinell) | Typically 140-200 HB | ASTM E10 |
| Charpy V-Notch Impact | Optional (when specified for low-temp service) | ASTM A370 |
Note: "F42" designation indicates minimum yield strength of 42 ksi (290 MPa). Mechanical properties designed to match API 5L X42 line pipe.
ASTM A694 F42 Flange Dimensions & Pressure Rating Chart
Pressure-Temperature Ratings for A694 F42 Flanges
| Temperature -F (-C) | Class 150 | Class 300 | Class 600 | Class 900 | Class 1500 | Class 2500 |
|---|---|---|---|---|---|---|
| -20 to 100 (-29 to 38) | 285 psi | 740 psi | 1480 psi | 2220 psi | 3705 psi | 6170 psi |
| 200 (93) | 260 psi | 675 psi | 1350 psi | 2025 psi | 3375 psi | 5625 psi |
| 300 (149) | 230 psi | 655 psi | 1315 psi | 1970 psi | 3280 psi | 5470 psi |
| 400 (204) | 200 psi | 635 psi | 1270 psi | 1900 psi | 3170 psi | 5280 psi |
| 500 (260) | 170 psi | 600 psi | 1200 psi | 1795 psi | 3000 psi | 4995 psi |
| 600 (316) | 140 psi | 550 psi | 1095 psi | 1640 psi | 2735 psi | 4560 psi |
| 650 (343) | 125 psi | 535 psi | 1075 psi | 1610 psi | 2685 psi | 4480 psi |
Note: Pressure ratings per ASME B16.5, same as A105 flanges. A694 F42 provides higher yield strength reserve for pipeline applications.
Types of ASTM A694 F42 Flanges Available
ASTM A694 F42 Orifice Flange
ASTM A694 F42 Threaded Flange
ASTM A694 F42 Reducing Flange
ASTM A694 F42 Lap Joint Flange
ASTM A694 F42 Long Weld Neck Flange
ASTM A694 F42 Socket Weld Flange
ASTM A694 F42 Weld Neck Flange
ASTM A694 F42 Blind Flange
ASTM A694 F42 Slip-On Flange
Standard Flange Sizes & Weight Chart
ASTM A694 F42 Weld Neck Flange Dimensions (ANSI B16.5) - Class 150 Sample
| NPS | Outside Diameter (mm) | Thickness (mm) | Bore (mm) | Hub Dia (mm) | Bolt Circle (mm) | No. of Bolts | Bolt Dia | Approx Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 1/2" | 90 | 11 | 21 | 35 | 60 | 4 | M12 | 0.45 |
| 1" | 108 | 13 | 33 | 50 | 79 | 4 | M12 | 0.86 |
| 2" | 152 | 16 | 60 | 75 | 121 | 4 | M16 | 1.80 |
| 4" | 229 | 19 | 114 | 127 | 190 | 8 | M16 | 5.40 |
| 6" | 267 | 21 | 168 | 184 | 229 | 8 | M19 | 8.60 |
| 8" | 330 | 24 | 219 | 238 | 286 | 8 | M19 | 14.5 |
| 10" | 406 | 27 | 273 | 305 | 362 | 12 | M22 | 24.0 |
| 12" | 483 | 29 | 324 | 346 | 432 | 12 | M22 | 36.0 |
| 16" | 597 | 32 | 419 | 448 | 546 | 16 | M25 | 64.0 |
| 20" | 699 | 38 | 508 | 559 | 648 | 20 | M25 | 98.0 |
| 24" | 813 | 44 | 610 | 651 | 756 | 20 | M32 | 150.0 |
Is ASTM A694 F42 Good Quality for Pipeline Applications?
Yes, it is ASTM A694 F42, which is specifically intended to serve high pressure pipeline transmission service, and is a definite improvement over the standard A105 carbon steel flanges used in oil and gas applications. The designation of the F42 is based on 42 ksi (290 MPa), or about 16 percent higher than the yield strength of A105 of 36 ksi (250 Mpa), ensuring higher safety factors as well as enabling the design of the pipeline system with high operating pressure to optimize.
A694 F42 is designed to be compatible with API 5L X42 line pipe grade, and guarantees the entire pipeline system of pipes, fittings, and flanges is all met. This is important in ensuring consistency in mechanical properties, weldability, and performance properties of all the parts of the piping. The necessity of the heat treatment (normalizing, normalizing and tempering, or quenching and tempering with minimum tempering temperature of 540-C) helps to guarantee the homogeneity of microstructure, the increase of toughness, and the ability to resist brittle fractures.
The requirement is that the melting process has to be completely deoxidized (open hearth melting, electric furnace or basic oxygen) and that it has to be hot forged so that a wrought structure can develop throughout the flange body. The flanges are not machined out of plate or bar stock and so the grain flow and mechanical integrity are superior to the cut plate flanges. A694 F42 enjoys favor in wellhead and Christmas tree manifolds, high pressure gathering systems, and transmission pipelines, as well as in such critical components of pipelines as reliability and pressure integrity are paramount.
To achieve greater pressure applications, the A694 specification has grades F52, F60, or F65 with yield strengths to 65 ksi. A694 F42 offers a very good strike of strength, weldability, cost-effectiveness and availability to use in mainstream pipeline operations at moderate to high pressures.
Heat Treatment & Testing Requirements
Heat Treatment Process (Mandatory):
- Normalizing: Heat to austenitizing temperature (typically 900-950-C), cool uniformly in still air
- Normalizing + Tempering: After normalizing, reheat to minimum 540-C (1000-F), hold for adequate time, air cool
- Quenching + Tempering: Austenitize and quench in suitable liquid medium, then temper at minimum 540-C (1000-F)
- Tempering Temperature: Minimum 540-C (1000-F) for all heat treatment routes
Manufacturing Requirements:
- Melting Process: Fully-deoxidized melting (open hearth, electric furnace, or basic oxygen)
- Forging: Hot forging required to develop wrought structure throughout
- Prohibited: Flanges shall NOT be machined from plate or solid bar stock
- Material Type: Carbon steel, HSLA steel, or alloy steel as agreed
Testing Requirements:
- Tensile Testing: Per ASTM A370 (yield, tensile, elongation) - mandatory
- Hardness Testing: Brinell hardness verification
- PMI Testing: Positive Material Identification for grade verification
- Ultrasonic Testing: Per ASTM A388 when specified
- Hydrostatic Testing: Per ASTM A961 or MSS SP-44 when specified
- Impact Testing: Charpy V-notch when specified for low-temperature service
- Chemical Analysis: Product analysis when specified per ASTM A961
ASTM A694 F42 High Yield Flanges Price List 2026
| Flange Type | Size Range | Pressure Class | Indicative Price Range (USD/Piece) |
|---|---|---|---|
| Weld Neck (WN) | 1/2" - 2" | 150# | $7 - $20 |
| Weld Neck (WN) | 4" - 8" | 150# | $26 - $110 |
| Weld Neck (WN) | 10" - 24" | 150# | $175 - $650 |
| Weld Neck (WN) | 1/2" - 2" | 300# | $12 - $30 |
| Weld Neck (WN) | 4" - 8" | 300# | $45 - $195 |
| Weld Neck (WN) | 10" - 24" | 300# | $265 - $920 |
| Weld Neck (WN) | 1/2" - 2" | 600# | $17 - $44 |
| Weld Neck (WN) | 4" - 8" | 600# | $78 - $285 |
| Slip-On (SO) | 1/2" - 2" | 150# | $6 - $17 |
| Slip-On (SO) | 4" - 8" | 150# | $22 - $85 |
| Slip-On (SO) | 10" - 24" | 150# | $135 - $510 |
| Blind (BL) | 1/2" - 2" | 150# | $5 - $15 |
| Blind (BL) | 4" - 8" | 150# | $24 - $90 |
| Blind (BL) | 10" - 24" | 150# | $155 - $620 |
| Socket Weld (SW) | 1/2" - 2" | 150# - 600# | $10 - $38 |
| Threaded (TH) | 1/2" - 2" | 150# - 300# | $9 - $32 |
Note: A694 F42 flanges are typically 15-20% higher than A105 due to mandatory heat treatment and higher strength requirements.
Applications of ASTM A694 F42 Flanges in Industry
The ASTM A694 F42 High Yield Pipeline Flanges are commonly used in many industrial applications, and some of the common industries are given below.
Pipeline Transmission
Oil and gas transmission pipelines (matching API 5L X42 pipe), high-pressure gathering systems.
Wellhead Equipment
Christmas tree manifolds, wellhead flanges, production manifolds, flowline connections.
Offshore Platforms
Subsea pipeline connections, offshore production facilities, riser flanges.
Gas Processing
Natural gas processing plants, gas compression stations, high-pressure distribution.
Petrochemical
High-pressure process piping, pipeline connections to vessels, critical piping systems.
Refinery
High-pressure hydrocarbon service, crude oil pipelines, product pipelines.
LNG/LPG
High-pressure LPG pipelines, propane distribution, butane transmission.
Industrial Applications
High-pressure steam lines, high-pressure water injection, hydraulic systems.
Oil & Gas Production
Production manifolds, gathering systems, injection lines, export pipelines.
Pipeline Valve Stations
Block valve connections, control valve flanges, meter runs.
Why Choose ASTM A694 F42 Flanges from Metinox Overseas?
Metinox Overseas provides certified ASTM A694 F42 high-yield pipeline flanges with obligatory heat treatment, total traceability, and assured purchase and fulfillment to API, ASME and NACE standard requirements of the necessary oil and gas projects. Our certified ISO 9001:2015 plants are available where all F42 flanges pass through appropriate heat treatment processes (normalizing, normalizing and tempering, quenching and tempering) with records of temperatures and holding times.
All flanges are supplied with EN 10204 3.1B Mill Test Certificates which are chemical composition (alloying elements reported), tensile test results (yield, tensile, elongation), hardness values, heat treatment record with actual temperatures and cooling method, and compliance statements with ASTM A694/ASME SA694. We issue PMI test certificates, dimensional inspection reports and ultrasonic test reports on request.
Our technical service provides special advice on the material to be used in pipeline applications, compatibility with the API 5L type of pipe grade (X42, X52, X60, X65), welding of high-yield steels, and adherence to the ASME B31.3, B31.4 and B31.8 piping code. We have ensured that your A694 F42 flanges are of high standard by providing them with third-party inspection support with TUV, SGS, DNV GL, and Lloyds Register.
We have a large stock of F42 flanges 1/2 to 48 in all pressure classes and have the ability to produce both NACE MR0175 sour service and special testing and expedited production to meet urgent pipeline projects. Delivering oil services, gas operators, and pipeline construction firms in more than 60 countries at competitive prices and punctual delivery timetables.
ASTM A694 F42 Flange Delivery Time & CIF Pricing by Country
| Destination Region | Major Ports / Cities | Estimated Delivery Time | Typical CIF Terms |
|---|---|---|---|
| Middle East (GCC) | Dubai, Dammam, Doha, Muscat, Kuwait, Bahrain | 7-12 Days | CIF Dubai / CIF Dammam |
| Europe | Rotterdam, Hamburg, Antwerp, Southampton, Felixstowe | 22-28 Days | CIF Rotterdam / CIF Hamburg |
| USA & Canada | Houston, New York, Los Angeles, Vancouver, Montreal | 28-35 Days | CIF Houston / CIF New York |
| Southeast Asia | Singapore, Port Klang, Manila, Jakarta, Bangkok | 12-18 Days | CIF Singapore / CIF Port Klang |
| Africa | Lagos, Durban, Mombasa, Alexandria | 18-25 Days | CIF Lagos / CIF Durban |
| South America | Santos, Buenos Aires, Callao | 32-40 Days | CIF Santos / CIF Buenos Aires |
| Australia | Melbourne, Sydney, Brisbane | 25-32 Days | CIF Melbourne / CIF Sydney |
Other Types of High Yield A694 F42 Flanges
ASTM A694 F42 High Yield Flanges, Pipeline A694 F42 Weld Neck Flanges, SA694 F42 Slip-On Flanges, ASME A694 F42 Blind Flanges, A694 F42 Socket Weld Flanges, A694 F42 Threaded Flanges, ANSI B16.5 A694 F42 Lap Joint Flanges, High Yield A694 F42 Orifice Flanges, A694 F42 Long Weld Neck Flanges, ASTM A694 F42 Reducing Flanges, A694 F42 Class 150 Flanges, A694 F42 Class 300 Flanges, A694 F42 Class 600 Flanges, A694 F42 RTJ Flanges, A694 F42 SORF Flanges.
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Frequently Asked Questions (FAQ)
A694 F42 has higher yield strength (42 ksi vs 36 ksi) and is specifically designed for high-pressure pipeline transmission service. F42 requires mandatory heat treatment, fully-deoxidized melting, and hot forging (cannot be machined from plate). A105 is for general piping; F42 is for pipeline applications matching API 5L X42 pipe.
The "F42" indicates minimum yield strength of 42 ksi (290 MPa). Similarly, F52 = 52 ksi, F60 = 60 ksi, F65 = 65 ksi. The grade numbers directly represent the minimum yield strength requirement in thousands of pounds per square inch (ksi).
No, ASTM A694 specification explicitly prohibits flanges from being machined directly from plate or solid bar stock. All A694 flanges must be hot forged to develop a wrought structure throughout the part, ensuring superior grain flow and mechanical properties.
Yes, all A694 grades require mandatory heat treatment. For carbon steel and HSLA grades (including F42), heat treatment may consist of normalizing, normalizing and tempering, or quenching and tempering. Minimum tempering temperature is 540-C (1000-F).
A694 F42 is designed to match API 5L X42 (formerly Grade B) line pipe, providing compatible mechanical properties for pipeline systems. Similarly: F52 matches X52, F60 matches X60, F65 matches X65, ensuring metallurgical compatibility throughout the pipeline.
Yes, with NACE MR0175/ISO 15156 compliance. Specify sour service requirements including HIC (Hydrogen Induced Cracking) testing, hardness restrictions (=22 HRC), product analysis, and sour service documentation. Material must demonstrate SSC (Sulfide Stress Cracking) resistance.
Use low-hydrogen electrodes suitable for high-yield steels: SMAW E7018 or E8018-C1, GMAW ER70S-6, FCAW E71T-1. Preheat to 120-150-C for thickness >25mm. Maintain interpass temperature <260-C. Follow qualified WPS per ASME Section IX for high-yield materials.
F60 has higher yield strength (60 ksi vs 42 ksi, approximately 43% higher) and typically higher carbon content. F60 is used for higher pressure pipelines and more demanding applications. F42 provides adequate strength for moderate high-pressure service at lower cost.
A694 material grades are not specifically listed in ASME B16.5 or B16.47 pressure-temperature rating tables. However, many prominent oil and gas companies accept A694 flanges manufactured to B16.5/B16.47 dimensions for pipeline applications. Pressure ratings typically follow carbon steel tables.
Stock items with standard heat treatment: 6-8 days ex-works. Made-to-order flanges: 5-6 weeks including forging, mandatory heat treatment (normalizing/tempering), mechanical testing, and documentation. Large diameter B16.47 or special testing: 6-8 weeks. Heat treatment cycle alone requires 3-5 days minimum.
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