Six-flat geometry for machining efficiency
Product formBars
/ 01 — TECHNICAL OVERVIEW
Hex Bars
Bars provide feedstock for machining, shafts, valves, fasteners, structural components, supports, tooling and fabricated assemblies. NESCO supplies round, bright, hexagonal, square and flat bars in stainless steel and special alloys, subject to grade, size, condition and specification.
Whether the requirement is for standard maintenance quantities or a project package, our team reviews each bar requirement against the requested material, dimensions, specification, service conditions, inspection and delivery plan. Availability may include ex-stock, mill production or made-to-order supply depending on the combination.
How it is made
01
Billet or round feedstock is hot rolled, extruded or cold drawn through hexagonal tooling.
02
Heat treatment establishes the ordered grade and machining condition.
03
Drawing or finishing controls the across-flats dimension, corner geometry and straightness.
04
Bars are cut to random or fixed length and ends are prepared as specified.
05
Across-flats size, twist, straightness, surface and heat identity are verified.
Request reviewed quotation Material documents on request
/ 02 — PRODUCT DETAIL
Built around the specification.
Key characteristics and commonly referenced standards from the supplied technical content master.
Key features01 02 03 04
Cold-drawn or hot-finished forms
Across-flat dimension and tolerance specified
Cut lengths and chamfering available where confirmed
Common specification references
STD
Applicable bar material standard
STD
Dimensional tolerance agreed by across-flats size
Explore the bars range
/ 03 — AVAILABLE GRADES
Available Material Grades
NESCO supplies the material families shown below in bar form, subject to the exact grade, profile, size, condition, standard and availability.
Material familyCommon gradesTypical selection context
Stainless steel304/304L, 316/316L, 321, 347, 410, 420, 431
Machining, shafts, food, chemical and general engineering
Duplex / super duplexUNS S31803 / S32205, UNS S32750 / S32760
High-strength, chloride-resistant machined components
Nickel alloysUNS N08020, UNS N08028, UNS N04400, UNS N06600, UNS N06625, UNS N07718, UNS N08825, UNS N06022, UNS N10276
Corrosion, temperature and high-performance components
Copper-nickelUNS C70600 (90/10 Cu-Ni), UNS C71500 (70/30 Cu-Ni)
Marine, seawater and condenser components
TitaniumGrades 2, 5 and 7
Lightweight, corrosion-resistant and high-strength components
/ 04 — SUPPLY & CUSTOMISATION
Define the supply condition.
Final availability depends on the complete combination of material, dimensions, standard, condition, testing and quantity.
ParameterTypical information to specify
01Dimensions
Diameter, across flats, side or width × thickness
02Condition
Hot rolled, forged, solution annealed, cold drawn, peeled, ground or polished
03Length
Random, fixed or cut pieces
04Tolerance
Commercial, precision or agreed tolerance class
05Surface
Black, pickled, bright, ground, polished or machined
06Testing
PMI, hardness, mechanical, UT or other agreed tests
07Identification
Heat-wise tagging, stamping or colour coding as agreed
/ 05 — DIMENSIONS & SIZE RANGE
Dimensions aligned to the manufacturing route.
Bar dimensions are ordered by profile-specific size and tolerance. Confirm machining allowance, straightness, corner geometry and cut-length tolerance where critical.
ProfileSize basisCommon conditionsCritical order detail
RoundDiameterHot rolled, peeled, ground or polishedDiameter tolerance and straightness
HexagonAcross flatsHot finished or cold drawnCorner condition and twist
SquareSide dimensionHot rolled or cold finishedSquareness and corner radius
FlatWidth x thicknessHot/cold rolled or plate/strip-derived where permittedManufacturing route, edge condition and flatness
/ 06 — MANUFACTURING STANDARDS
Standards aligned for every order.
The material standard, dimensional standard and project requirements should be stated separately.
ReferenceWhat it coversRole
ASTM A276/A276MStainless steel bars and shapes
General bar material
ASTM A479/A479MStainless steel bars and shapes for use in boilers and other pressure vessels
Pressure equipment
ASTM A484/A484MGeneral requirements for stainless bars, billets, shapes and forgings
Tolerance / quality
Applicable ASTM B-series specificationsNickel alloys, titanium alloys and copper-nickel/copper alloys, depending on grade and product form
Special alloys
EN 10088-3Technical delivery conditions for stainless semi-finished products, bars, rods, wire, sections and bright products for general purposes
European reference
Drawing / tolerance classProfile dimensions, straightness, finish and cut length
Order-specific
/ 07 — INSPECTION & TESTING
Evidence before dispatch.
01Heat-number and MTC review
02Profile size and dimensional tolerance
03Straightness, twist and length inspection
04Surface examination and finish comparison
05PMI and hardness when specified
06Ultrasonic testing for critical bar
07Cut-list and piece-mark verification
PACKAGING & MARKING
Protected and traceable.
01Heat-wise bundles with separators between grades
02Oiled or wrapped surfaces where appropriate
03Threaded or machined ends protected
04Wooden cases or crates for precision cut pieces where required
05Grade, heat, size, condition and PO tags on each bundle
/ 08 — APPLICATIONS & INDUSTRIES
Engineered for demanding service environments.
From process plants to marine systems, NESCO coordinates material, dimensions and documentation around the operating conditions of each application.
01
Shafts and pump components02
Valves and fittings03
Fasteners and threaded parts04
Machined components05
Chemical and marine equipment06
Industrial machinery and OEM components07
Food/pharma equipment08
General engineering and fabricationIndustries servedOne supply partner across critical sectors.
MachiningValves & pumpsOil & gasChemical processingMarineIndustrial machinery & OEMsFood equipmentGeneral engineering
/ 09 — WHY NESCO PIPE & TUBES
Built for buyers who cannot leave details to chance.
From specification review to export documentation, NESCO coordinates the technical and commercial details as one complete supply requirement.
01
Specification control
NESCO reviews the grade, product standard, dimensions, condition and acceptance criteria as one coordinated requirement.
02
Multi-material sourcing
Stainless steel, duplex, nickel alloy, copper-nickel and titanium requirements can be combined within one project enquiry.
03
Traceable documentation
Heat numbers, MTCs and agreed inspection records are aligned with the purchase order before dispatch.
04
Inspection coordination
PMI, dimensional checks, NDT and third-party witnessing can be arranged against an approved inspection plan.
05
Value-added processing
Cutting, machining, end preparation, polishing or protective finishing can be reviewed with the base material supply.
06
Export-ready packing
Identification, surface protection and packing are planned around product geometry and the final transport route.
07
Responsive RFQ review
Technical and commercial inputs are consolidated early so queries are resolved before quotation and production.
08
One accountable supply desk
NESCO provides a single contact for material, processing, documentation, packing and delivery coordination.
/ 10 — FREQUENTLY ASKED QUESTIONS
Clear answers before you specify.
Quick guidance on product selection, standards, dimensions, inspection and documentation. For project-specific requirements, NESCO will review the complete enquiry with your team.
01How is hex bar size ordered?
Hex bar is normally specified by the across-flats dimension, tolerance, length, grade and finish.
02Can hex bars be cut and chamfered?
Cut lengths and chamfered ends can be reviewed for repeat machining packages.
03What information is needed to quote bar?
State profile, grade, material standard, size, tolerance, condition, finish, length, quantity and testing.
04Can bars be supplied in fixed cut lengths?
Yes, subject to cutting tolerance, minimum order quantity and the selected grade and diameter.
05Which finish is best for machining?
Peeled, turned, ground or bright-drawn conditions may reduce machining allowance; the final component tolerance and surface requirement should guide selection.
06Can heat-wise traceability be maintained after cutting?
Piece marking or heat-wise segregation can be arranged when specified before processing.
/ 11 — REQUEST FOR QUOTATION Nesco direct sales desk
Ready to source?Start with the details you already have.
Our team will review the grade, dimensions, testing and delivery requirements together.