Ferritic and martensitic Fe-Cr stainless steel family; exact chemistry depends on the specified 400-series grade.
Material gradeStainless Steel Grades
/ 01 — TECHNICAL OVERVIEW
Stainless Steel 400 Series
Nesco Pipe & Tubes is a manufacturer, supplier, stockist and exporter of Stainless Steel 400 Series grades including 409 (UNS S40900), 410 (UNS S41000), 420 (UNS S42000) and 430 (UNS S43000), offering pipes, tubes, flanges, butt weld fittings, sheets, plates, coils and round bars in specified dimensions, finishes, conditions and testing requirements for industrial and project applications. Availability and applicable standards are confirmed against the customer’s purchase specification.
Stainless steels combine corrosion resistance with practical fabrication and broad product availability. Austenitic grades such as 304/304L and 316/316L are widely used across process, food, pharmaceutical and general engineering applications, while ferritic and martensitic grades provide different combinations of strength, hardness, wear resistance and corrosion resistance.
400 series stainless steels include ferritic and martensitic grades such as 409, 410, 420 and 430. The exact grade must be specified because chemistry, heat-treatment condition, mechanical properties, corrosion resistance and applications vary significantly across the series.
The correct material depends on more than corrosion resistance alone. Temperature, pressure, chloride exposure, chemistry, erosion, fabrication route, weldability, mechanical strength, product form, code requirements and lifecycle cost should be reviewed together. Final grade selection remains with the customer’s qualified engineer, designer or material specialist.
How it is made
01
Steelmaking and refining establish the specified grade chemistry and control residual elements.
02
The alloy is cast and hot worked into billet, slab or other feedstock for the selected product form.
03
Hot/cold processing creates pipe, tube, flat product, bar, flange or fitting geometry.
04
Annealing or grade-specific heat treatment develops the required metallurgical condition, hardness and mechanical properties.
05
Descaling, pickling, machining or polishing is followed by inspection, traceability and certification.
Request reviewed quotation Material documents on request
/ 02 — PRODUCT DETAIL
Built around the specification.
Key characteristics and commonly referenced standards for Stainless Steel 400 Series.
Key features01 02 03 04
Available across multiple project product forms subject to specification.
Heat-wise traceability and MTC support.
PMI, NDT and third-party inspection options.
Common specification references
STD
ASTM A240/A240M — Plate, sheet and strip where the specified ferritic or martensitic grade is listed
STD
ASTM A276/A276M — Bars and shapes where the specified grade is listed
STD
ASTM A479/A479M — Pressure-service bars and shapes where the specified grade is listed
STD
ASTM A268/A268M — Ferritic and martensitic stainless tubing for general service; confirm grade listing
STD
ASTM A213/A213M — Ferritic boiler, superheater and heat-exchanger tubes where the grade is listed
STD
ASTM A182/A182M — Forged or rolled pressure components where the specified grade is listed
STD
ASTM A815/A815M — Wrought ferritic and martensitic stainless piping fittings where the grade is listed
STD
Specified pipe material standard — Confirm the exact ferritic or martensitic grade, pipe construction and applicable specification; do not apply austenitic or duplex specifications by default
STD
Applicable EN standard — European requirements for the exact grade and product form
/ 03 — MATERIAL RANGE
Grades matched to the service.
Commonly requested families are shown below. Availability is confirmed against the complete specification.
Material familyCommon gradesTypical selection context
Specified gradeStainless Steel 400 Series
Ferritic and martensitic stainless grades selected according to required strength, hardness, corrosion resistance and service conditions
Common grades409, 410, 420, 430
Grade selection depends on the required material properties, product form and service
Alloy familyStainless Steel
Related grades are not treated as automatic substitutes
/ 04 — SUPPLY & CUSTOMISATION
Available forms and enquiry basis.
Pipes, tubes, flanges, butt weld fittings, sheets and plates, coils and round bars.
ParameterTypical Options
01Available Forms
Pipes, Tubes, Flanges, Butt Weld Fittings, Sheets, Plates, Coils, Round Bars
02Product Standard
Applicable material/product standard
03Supply Condition
Solution annealed, hot finished, cold worked, or other specified condition
04Dimensions
Product-form dimensions, tolerances, cut lengths, end/edge preparation
05Testing
PMI, mechanical, corrosion, NDT or supplementary testing as required
06Documentation
MTC and inspection reports as specified
07Identification
Heat number, grade, size and other agreed identification
08Enquiry Basis
Grade/UNS, product form, standard, dimensions, quantity and destination
/ 05 — DIMENSIONS & SIZE RANGE
Dimensions aligned to the manufacturing route.
Dimensions and supply options are confirmed against the exact grade, product form, applicable specification and manufacturing availability.
Product FormDimensions / ConfigurationSupply OptionsReference
PipesNPS/OD, schedule/wall thickness, length, end configurationSeamless/welded, heat treated/finishedApplicable material + dimensional standard
TubesOD, wall thickness, length/coil, U-bendSeamless/welded, annealed/specified finishApplicable ASTM/EN product standard
Flat ProductsThickness, width, length/coilHot/cold rolled, annealed, pickled/polishedApplicable flat-product material standard
Bars / ForgingsDiameter/profile, tolerance, cut lengthHot finished, forged, cold finished, machinedApplicable bar/forging standard
/ 06 — MANUFACTURING STANDARDS
Standards aligned for every order.
The material standard, dimensional standard and project requirements should be stated separately.
400 Series product-standard references
StandardWhat it covers
ASTM A240/A240MPlate, sheet and strip where the specified ferritic or martensitic grade is listed
ASTM A276/A276MBars and shapes where the specified grade is listed
ASTM A479/A479MPressure-service bars and shapes where the specified grade is listed
ASTM A268/A268MFerritic and martensitic stainless tubing for general service; confirm grade listing
ASTM A213/A213MFerritic boiler, superheater and heat-exchanger tubes where the grade is listed
ASTM A182/A182MForged or rolled pressure components where the specified grade is listed
ASTM A815/A815MWrought ferritic and martensitic stainless piping fittings where the grade is listed
Specified pipe material standardConfirm the exact ferritic or martensitic grade, pipe construction and applicable specification; do not apply austenitic or duplex specifications by default
Applicable EN standardEuropean requirements for the exact grade and product form
/ 07 — REFERENCE MATERIAL DATA
400 Series material reference.
A concise engineering identity for procurement. Exact chemical limits and mechanical acceptance values vary by product form, size, condition and specification edition; the certified MTC governs supplied material.
Chemistry and alloy identityPrincipal alloying profile · certification limits follow the ordered standard
Material referenceTechnical profile
Grade / designation400 Series
Alloying systemFerritic or martensitic Fe-Cr stainless family; exact chemistry depends on the specified 400-series grade.
Certification basisHeat analysis and product requirements are certified against the exact material specification stated on the purchase order.
Mechanical-property basisProduct-form and condition dependent · verify certified values
Property basisSupply requirement
Mechanical profileTensile, yield, elongation and hardness depend on exact grade, product form, thickness and heat-treatment condition.
Acceptance valuesUse the tensile, yield, elongation and hardness limits in the ordered product-form standard and specified condition.
CertificationActual heat/lot results are reported on the agreed material test certificate.
/ 08 — INSPECTION & TESTING
Evidence before dispatch.
01Grade/UNS/product standard verification
02Heat-number traceability and MTC review
03PMI against specified alloy/applicable material specification
04Dimensional, tolerance and surface-condition inspection
05Mechanical and hardness testing according to applicable product specification when specified
06Corrosion, microstructure, intergranular or other supplementary testing when required
07Applicable NDT and third-party witnessing against the approved inspection plan
Testing requirements are applied according to the applicable material/product standard, purchase specification and customer/project requirements.
/ 09 — PACKAGING & MARKING
Protected and traceable.
01Product-form-specific protection for machined faces, surfaces and ends.
02Heat-wise segregation and durable grade identification.
03Clean, non-contaminating separators/protective materials where required.
04Moisture-resistant wrapping/export packing where required.
05Wooden cases/crates where required.
06Identification labels can include grade, heat number, size, dimensions, quantity and PO/project reference, as applicable.
Packaging and marking can be adapted to customer, project and export requirements.
/ 10 — 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
Chemical processing02
Oil and gas03
Power generation04
Marine systems05
Heat exchangers06
Industrial fabricationIndustries servedOne supply partner across critical sectors.
Chemical processingOil & gasPower generationMarineHeat exchangersProcess equipmentGeneral engineering
/ 11 — 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.
/ 12 — 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.
01What product forms are available in 400?
Availability can include pipes, tubes, flanges, fittings, sheets, plates, coils and bars, but each form must be confirmed against its own material standard and production range.
02What standard should be specified for 400?
State both the exact grade/UNS and the product-form material standard. A plate specification cannot be assumed to cover pipe, tube, bar, flange or fitting supply.
03Can NESCO provide chemical and mechanical certificates?
Yes. An agreed material test certificate can report heat analysis and mechanical results required by the ordered specification.
04Can another grade be substituted?
Only with written approval from the responsible engineer after reviewing corrosion, strength, temperature, fabrication and code requirements.
05What information produces the fastest quotation?
Provide grade/UNS, product form, standard, size, condition, quantity, tests, certification and delivery destination.
/ 13 — 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.