Carbon Steel A694 F65 Round Bar
➡️ ASTM A694 F65 | UNS K03014 | EN 1.0570
➡️ ASTM, EN, JIS & International Standards
➡️ Supply Conditions
➡️ Multiple Diameters & Supply Lengths
➡️ Global Export & International Delivery
Country of Origin:
Europe, Japan, USA
Material Type:
Carbon Steel
UNS Number:
K03014
Wr. No.:
-
MTC Available:
EN 10204 3.1
Product Description for Carbon Steel A694 F65 Round Bar
Carbon Steel A694 F65 Round Bar is a forged or hot-rolled carbon-manganese bar produced to ASTM A694/A694M, the specification covering carbon and alloy steel forgings for pipe flanges, fittings, valves and parts intended for high-pressure transmission service. The ASME Boiler and Pressure Vessel Code designation is SA-694 F65.
The specification is organised around strength grades rather than around distinct chemistries. All grades from F42 to F70 share the same composition limits, with carbon capped at 0.30% and manganese at 1.60%, together with controlled additions of niobium, vanadium and titanium. Grade F65 is defined by a minimum yield strength of 448 MPa (65 ksi) and a minimum tensile strength of 552 MPa (80 ksi). These properties are achieved through a combination of microalloying, controlled rolling or forging, and heat treatment.
Bar is supplied in the normalised, normalised and tempered, or quenched and tempered condition as required to meet the grade. The strength grades of A694 are matched to API 5L line pipe grades, so a flange or fitting machined from F65 bar can be welded to line pipe of similar strength without a change in wall thickness. Low carbon and a controlled carbon equivalent keep the material field weldable.
Round bar and forged billet are commonly available from about 20 mm to 600 mm diameter in random or cut lengths, and are used as machining stock rather than as a structural section.
Principal applications are weld neck, slip-on and blind flanges, anchor flanges, forged fittings, valve bodies, bonnets, closures, tees and reducers for oil and gas transmission pipelines. Industries served include upstream and midstream oil and gas, pipeline construction, refineries, petrochemical plants, LNG terminals and offshore platforms.
Common Applications of Carbon Steel A694 F65 Round Bar
➡️ Machined shafts, spindles, valve stems, pump sleeves and pins for food, beverage, dairy and pharmaceutical equipment, where the passive chromium oxide film resists both product acids and caustic clean-in-place chemicals.
➡️ Fasteners, studs, bolts, threaded rod and anchor components produced from bar stock, chosen for corrosion resistance combined with the ductility needed for cold heading and thread rolling.
➡️ Chemical, water treatment and general process plant parts such as agitator shafts, flange blanks, nozzles and support components handling water, steam and mildly corrosive media free of significant chlorides.
➡️ Architectural and structural hardware including handrail stanchions, balustrade fittings, tension rods and bollards, where a bright ground or polished bar finish provides both appearance and low maintenance.
International Equivalent Grade for CS A694 F65 Round Bar
Standard
Country / Region
Grade / Equivalent
UNS
USA
K03014
ASTM A694 / A694M
USA
Grade F65
ASME
USA
SA-694
API 5L
International
-
EN 10222-2 / EN 10222-4
Europe / EU
-
BS EN 10222-4
United Kingdom
-
JIS G3202 / JIS G4051
Japan
-
GB/T 12459 / GB/T 699
China
-
KS D 3752
South Korea
-
Technical Specification for Carbon Steel A694 F65 Round Bar
Specification
Value
Unit
Material
Carbon Steel
-
Grade / Designation
ASTM A694 Grade F65
-
UNS Number
Not assigned by ASTM A694 / A694M
-
Product Form
Round Bar / Rod
-
Governing Chemistry Standard
ASTM A694 / A694M
-
Hot-Finished Bar Standard
ASTM A694 / A694M with general requirements to ASTM A788 / A788M
-
Cold-Finished Bar Standard
Cold finishing not covered by ASTM A694
-
Dimensional Tolerance Standard
ASTM A788 / A788M and purchase order agreement
-
Diameter (available range)
20 - 600
mm
Length (standard random)
Random or cut to length
m
Manufacturing Process
Open die forging, rolled bar or forged billet
-
Production Route
Electric arc furnace or basic oxygen furnace, ladle refined, vacuum degassed where specified, then forged or rolled
-
Surface Finish
As forged, hot rolled and descaled, rough turned or machined all over
-
Heat Treatment / Delivery Condition
Normalised, normalised and tempered, or quenched and tempered as required to meet Grade F65
-
Carbon Equivalent CEV (typical, calculated)
0.43 maximum by agreement
-
Density (typical)
7.85 - 7.87
g/cm3
Melting Range (approximate)
1480 - 1526
degC
Thermal Conductivity at 20 degC (typical)
51.9
W/m.K
Coefficient of Thermal Expansion 20-100 degC (typical)
12.2
um/m.K
Specific Heat Capacity (typical)
486
J/kg.K
Electrical Resistivity at 20 degC (typical)
0.159
uOhm.m
Modulus of Elasticity (typical)
200 - 210
GPa
Poisson Ratio (typical)
0.27 - 0.30
-
Magnetic Properties
Ferromagnetic
-
Applicable Testing / Inspection Standard
ASTM A370 for mechanical testing, ASTM A751 for chemical analysis, ASTM A788 / A788M for general forging requirements
-
Certification / Inspection Document
EN 10204 Type 3.1 or Type 3.2. NACE MR0175 / ISO 15156 compliance available on request
-
Technical Specifications
Get the key technical specifications for Carbon Steel A694 F65 Round Bar
Carbon Steel A694 F65 Round Bar is ordered against ASTM A694/A694M, with general requirements for steel forgings supplied by ASTM A788/A788M. Unlike chemistry-based bar standards, A694 fixes the acceptance criteria on mechanical performance: a minimum yield strength of 448 MPa and a minimum tensile strength of 552 MPa for grade F65, with elongation of at least 20 percent and reduction of area of at least 30 percent.
Material is supplied normalised, normalised and tempered, or quenched and tempered, whichever route the manufacturer selects to reach the grade. The heat treatment condition, the austenitising and tempering temperatures, and the section thickness represented by the test material are all recorded on the certificate. Test blanks must be heat treated with the production material and must represent its heaviest section.
Because A694 is a forging specification rather than a bar specification, dimensional tolerance is not taken from a standard size table. Diameter, length, straightness and machining allowance are agreed on the purchase order, with ASTM A788/A788M covering marking, workmanship, repair, retesting and the general quality framework.
Chemical analysis follows ASTM A751 and mechanical testing follows ASTM A370. Ultrasonic examination to ASTM A388 and magnetic particle examination to ASTM E1444 are commonly added for pressure-containing parts. Charpy impact testing is supplementary requirement S5. For wet sour service the order should invoke NACE MR0175 / ISO 15156 with a 22 HRC hardness ceiling. Density is about 7.85 – 7.87 g/cm3 and modulus of elasticity approximately 200 – 210 GPa. Certification is normally EN 10204 Type 3.1, with Type 3.2 third-party inspection common on pipeline projects.
Chemical Composition for Carbon Steel A694 F65 Round Bar
Element
Symbol
Min
Max
Unit
Carbon
C
-
0.30
%
Manganese
Mn
-
1.60
%
Phosphorus
P
-
0.025
%
Sulphur
S
-
0.025
%
Silicon
Si
0.15
0.35
%
Nickel
Ni
-
0.40
%
Chromium
Cr
-
0.30
%
Molybdenum
Mo
-
0.12
%
Copper
Cu
-
0.40
%
Vanadium
V
-
0.08
%
Niobium (Columbium)
Nb
-
0.05
%
Titanium
Ti
-
0.02
%
Chemical Composition
View the chemical composition and applicable material limits for CS A694 F65 Round Bar
ASTM A694/A694M applies a single set of composition limits to every strength grade from F42 to F70. The differences between grades are achieved by microalloying level, forging or rolling practice and heat treatment, not by a change in the specified chemistry envelope. This is why grade F65 carries the same maximum carbon and manganese as the lower grades.
Carbon is capped at 0.30% and phosphorus and sulphur are both held to 0.025% maximum, tighter than in general structural steels. The low carbon ceiling protects field weldability, while the low phosphorus and sulphur improve toughness and through-thickness ductility in thick forged sections. Manganese up to 1.60% is the main strengthening and hardenability element and combines with residual sulphur to prevent hot shortness.
Niobium up to 0.05%, vanadium up to 0.08% and titanium up to 0.02% are the microalloying elements that make the higher strength grades possible. They form fine carbonitrides that pin austenite grain boundaries during hot working and precipitation strengthen the ferrite, raising yield strength without raising carbon. Silicon between 0.15% and 0.35% provides deoxidation.
Residual nickel, chromium, molybdenum and copper are limited to 0.40%, 0.30%, 0.12% and 0.40% respectively, with a total residual restriction applied by the specification. Where the material will see wet sour service, a maximum carbon equivalent and NACE MR0175 / ISO 15156 hardness limits should be added to the purchase order.
Mechanical Properties for Carbon Steel A694 F65 Round Bar
Mechanical Property
Value
Unit
Tensile Strength minimum
552
MPa
Tensile Strength minimum
80
ksi
Yield Strength minimum 0.2 percent offset
448
MPa
Yield Strength minimum 0.2 percent offset
65
ksi
Elongation in 50 mm minimum
20
%
Reduction of Area minimum
30
%
Hardness maximum for sour service by agreement
22
HRC
Charpy V-notch Impact Energy
Supplementary requirement S5, specify temperature and energy on order
-
Modulus of Elasticity typical
200 - 210
GPa
Mechanical Properties
Check the key mechanical properties and performance requirements of CS A694 F65 Round Bar
Grade F65 is defined entirely by its mechanical requirements. ASTM A694/A694M specifies a minimum yield strength of 448 MPa (65 ksi) and a minimum tensile strength of 552 MPa (80 ksi), together with a minimum elongation in 50 mm of 20% and a minimum reduction of area of 30%. These are mandatory acceptance values, not typical figures.
Tension testing is carried out to ASTM A370 on specimens taken from production forgings or from separately forged test blanks that have received the same heat treatment as the production material. The specification requires the test material to represent the heaviest section of the forging, so that the reported properties reflect the slowest cooling rate present in the part.
Charpy V-notch impact testing is not mandatory in the base specification. It is invoked through supplementary requirement S5, where the test temperature and minimum absorbed energy are agreed between purchaser and manufacturer. Low-temperature pipeline and offshore projects almost always invoke it, typically at minus 20 degC or minus 46 degC.
The strength grades are deliberately aligned with API 5L line pipe strength classes, so that a flange or fitting can be matched to the connecting pipe. This avoids a strength mismatch across the girth weld. For wet sour service, a maximum hardness of 22 HRC in accordance with NACE MR0175 / ISO 15156 is normally added, which may require a lower tempering temperature limit and additional hardness survey testing.
Dimension / Sizes for Carbon Steel A694 F65 Round Bar
Dimension / Size
Value
Unit
Diameter (hot-finished)
20 - 600
mm
Diameter (cold-finished)
Not covered by ASTM A694
mm
Standard Length (random)
3 - 6
m
Custom / Cut-to-Length
Available on request, typically 0.1 - 12
m
Diameter Tolerance (hot-finished)
Per ASTM A788 / A788M and purchase order agreement
-
Diameter Tolerance (cold-finished)
Not applicable
-
Length Tolerance
Per applicable product standard or as agreed on order
-
Straightness Tolerance
Per applicable product standard or as agreed on order
-
Out-of-Round / Circularity
Controlled by the ordered tolerance class
-
End Condition
Saw cut, sheared, chamfered or centre-drilled as ordered
-
Surface Finish
Hot rolled, hot rolled and descaled, cold drawn, peeled, turned, ground or polished
-
Available Size Range
20 - 600
mm
Cut-to-Length Availability
Yes, subject to minimum order quantity
-
Applicable Dimensional Standard
ASTM A788 / A788M general requirements for steel forgings
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for CS A694 F65 Round Bar
Pricing for Carbon Steel A694 F65 Round Bar
Round Bar Prices are generally quoted per kilograms or meters tonnes and can fluctuate with the global raw material and market prices. The final price will depend on a variety of factors, including the grade size, diameter, length, surface finish, the quantity and whether the bars are cut to length or in standard lengths.
For smaller quantities, we can also quote per metre or per piece basis once the required dimensions have been confirmed. Container-loads or orders that are larger in size are typically priced per tonne, based upon the specifications required and the supply conditions.
Please provide your desired dimensions, grades, length number, and end for a current quote including the lead time applicable and details for certification.
Pricing
Get current Carbon Steel A694 F65 Round Bar pricing based on size, quantity, grade, finish, and delivery requirements.
Why Choose Us
Euro Steel Bars is an international distributor, stockist and exporter of stainless round steel bars that cover carbon, stainless alloy, special grades. We stock a variety of sizes and grades. We guarantee every order with mill test certificates as well as full quality-assurance documentation. Our name speaks to our roots: European-sourced materials that is backed by the certificates and rigor that buyers from Asia as well as the Gulf and Africa are looking for.
Each bar we deliver is accompanied by EN 10204 3.1 mill test certificates as well as complete documentation of quality, so what you receive corresponds to what’s written in the documents. We carry a selection of sizes and grades ready for transport, and cut length upon the request of customers, which results in quicker lead times, whether you’re ordering just a one-off spec or a complete project tonnage.
We operate an actual wholesale business that is that is supported with an internationally-operated supply chain therefore we are able to serve fabricators sourcing one grade the same way in the same way as an EPC contractor who is placing a large order. Our clients include manufacturers, fabricators EPC construction companies, engineers oil and gas projects as well as construction companies. we design our inventory as well as documentation to show what buyers need to bring projects forward.
Our customers trust us across Qatar, Oman, Bahrain, Kuwait, Jordan, Malaysia, Singapore, Thailand, Taiwan, Turkey, Italy and South Africa. If you’re looking to source an Gulf energy project, or a construction project within Southeast Asia, you get the same quality of certified material, the exact documentation, and the exact delivery procedure.
Frequently Asked Questions
What is Carbon Steel A694 F65 Round Bar?
Which standard does A694 F65 Round Bar comply with?
What is the difference between A694 F42, F52, F60, F65 and F70?
What are the equivalent grades of A694 F65?
What chemical composition applies to A694 F65?
Is Charpy impact testing included?
Is A694 F65 suitable for sour service?
What sizes and lengths are available?
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