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Stainless Steel

Explore our range of stainless steel flange materials, including 304/304L, 316/316L, 321 and 347 grades, designed for corrosion resistance, high-temperature performance and demanding industrial applications. Every selection is supported by traceable material documentation and quality checks.

ISO 9001:2015 Third Party Inspection EN 10204 3.1 MTC Global Export Ready

ASME API DIN EN ISO AWWA C207 JIS GOST BS MSS SP SANS 1123

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01 — STAINLESS STEEL GRADES

Find your grade

Search by grade, UNS or flange designation, or filter by family. Works the same whether you list 20 grades or 200.

GRADE	UNS	ASTM SPECIFICATION	FAMILY	TYPICAL USE

02 — APPLICABLE STANDARDS

Manufactured to recognised standards

Tap a standard to see what it covers, typical grades and the documents we supply. Ask us on WhatsApp for the exact standard you need.

ASTM A182/A182M

Forged or rolled alloy and stainless steel components

FlangesForged fittingsValvesF304F316LF51F53

What it covers

Covers

Pipe flanges, forged fittings and valves
High-temperature service
Alloy, stainless and duplex F-grades

Typical grades

F304 / F304L
F316 / F316L
F321, F347
F51, F53 (duplex)

Documents we supply

Material test certificate (EN 10204 3.1)
Test report and certificate of compliance
PMI and third-party inspection on request

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ASTM A351/A351M

Austenitic steel castings

CastingsPressure-containingCF8CF3MCF8C

What it covers

Covers

Cast parts for valves, flanges and fittings
Pressure-containing service
Austenitic cast grades

Typical grades

CF8, CF3
CF8M, CF3M
CF8C

Documents we supply

Material test certificate
Chemical and mechanical test results
Inspection on request

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ASTM A995/A995M

Duplex stainless steel castings

CastingsDuplexGrade 1BGrade 4A

What it covers

Covers

Austenitic-ferritic (duplex) cast parts
Pressure-containing service
Strength with corrosion resistance

Typical grades

CD4MCuN (1B)
CD3MN (4A)
CD3MWCuN (6A)

Documents we supply

Material test certificate
Chemical and mechanical test results
Inspection on request

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ASTM A961/A961M

Common requirements for steel piping components

General requirementsMarkingCertificationTesting

What it covers

Covers

Rules common to flanges, forged fittings and valves
Applies alongside the product standard
Product standard prevails if the two differ

Used with

ASTM A182 and other piping standards

Documents we supply

Test report and certificate of compliance with every lot
Marking to MSS SP-25
Optional PMI, MPI and liquid penetrant tests

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ASTM A217/A217M

Martensitic stainless and alloy steel castings

Castings Martensitic Stainless Alloy Steel High Temperature

What it covers

Covers

Martensitic stainless steel and ferritic alloy steel castings
Valves, flanges, fittings and other pressure-containing parts
Applications requiring high-temperature and corrosion resistance, depending on grade and service conditions

Typical grades

CA15 — Martensitic stainless steel
WC6 and WC9 — Chromium-molybdenum alloy steel grades
C5, C12 and C12A — Alloy steel casting grades

Documents we supply

Material test certificate, as applicable to the supplied product
Chemical composition and mechanical test results
Inspection and supplementary testing, as agreed in the purchase order

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ASTM A965/A965M

Austenitic stainless steel forgings for pressure and high-temperature parts

Forgings Pressure Vessels High-Temperature Service F304 F316L F321 F347

What it covers

Covers

Austenitic stainless steel forgings for boilers and pressure vessels
Forgings for high-temperature parts and associated equipment
Pressure-containing components made from specified austenitic stainless steel grades
Chemical composition and mechanical-property requirements
Solution heat treatment, inspection and supplementary testing, as applicable

Typical Grades

F304, F304H, F304L, F304N and F304LN
F309H, F310 and F310H
F316, F316H, F316L, F316N and F316LN
F321 and F321H
F347 and F347H
F348 and F348H
FXM-19, FXM-11 and F46

Documents We Supply

Material Test Certificate, as specified
Chemical analysis and mechanical test results, as applicable
Solution heat-treatment records, where applicable
Inspection and supplementary testing reports, when ordered and available
PMI and third-party inspection on request

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ASTM A352/A352M

Ferritic and martensitic steel castings for low-temperature service

Castings Carbon Steel Low-Alloy Steel Low Temperature Martensitic Stainless

What it covers

Covers

Ferritic and martensitic steel castings for low-temperature service
Valves, flanges, fittings and other pressure-containing parts
Materials requiring impact-toughness testing for the specified service temperature

Typical grades

CA6NM — Martensitic stainless steel casting

Documents we supply

Material test certificate, as applicable to the supplied product
Chemical composition and mechanical test results
Impact-test results and additional inspection records, as agreed in the purchase order

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ASTM A473

Stainless steel forgings for general use and for low- or high-temperature service

Stainless Steel Forgings Austenitic Duplex Ferritic Martensitic High-Temperature Service

What it covers

Covers

Austenitic stainless steel forgings
Austenitic-ferritic stainless steel forgings
Ferritic stainless steel forgings
Martensitic stainless steel forgings
Forgings for general use and low- or high-temperature service

Typical Grades

201, 202, 304 and 304L — Austenitic stainless steel
309, 310 and 314 — Heat-resistant austenitic stainless steel
316, 316L and 317 — Molybdenum-bearing austenitic stainless steel
321, 347 and 348 — Stabilized austenitic stainless steel
255, 32950 and 32760 — Austenitic-ferritic (duplex) stainless steel
405, 429, 430 and 446 — Ferritic stainless steel
403, 410, 414, 420, 431 and 440-series grades — Martensitic stainless steel

Documents We Supply

Material Test Certificate, as specified
Chemical composition and mechanical test results, as applicable
Heat-treatment records, where applicable
Inspection and supplementary testing reports, when ordered and available
PMI and third-party inspection on request

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ASTM A743/A743M

Iron-chromium and iron-chromium-nickel corrosion-resistant steel castings for general applications

Steel Castings Stainless Steel Ferritic Martensitic Austenitic Corrosion Resistant

What it covers

Covers

Iron-chromium alloy castings for corrosion-resistant applications
Iron-chromium-nickel alloy castings for corrosion-resistant applications
Steel castings intended for a wide variety of corrosion environments
Cast components manufactured and tested in accordance with the applicable specification requirements

Typical Grades

CA6NM, CA15 and CA40 — Martensitic stainless steel castings
CB6 — Martensitic 16Cr-4Ni stainless steel casting
CF3, CF8 and CF20 — Austenitic stainless steel castings
CF3M and CF8M — Molybdenum-bearing austenitic stainless steel castings
CF8C — Niobium-stabilized austenitic stainless steel casting
CG3M, CG8M and CG12 — Austenitic stainless steel castings
CE30, CH10, CH20 and CK20 — High-alloy corrosion-resistant or heat-resistant castings
CN3M, CN3MN, CN7M and CN7MS — Highly alloyed corrosion-resistant castings
CA28MWV, CB30 and CC50 — Other chromium-alloy steel casting grades

Documents We Supply

Material Test Certificate, as specified in the purchase order
Chemical composition and mechanical test results, as applicable
Heat-treatment records, where applicable
Inspection and supplementary testing reports, when ordered and available
PMI and third-party inspection on request

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ASTM A744/A744M

Iron-chromium-nickel corrosion-resistant steel castings for severe service

Steel Castings Stainless Steel Austenitic Corrosion Resistant Severe Service High-Alloy Steel

What it covers

Covers

Iron-chromium-nickel alloy stainless steel castings for particularly severe corrosive applications
Cast components designed for service in demanding corrosive environments
Postweld heat treatment for weld repairs affecting surfaces exposed to the corrosive medium, as required by the specification
Heat treatment, chemical composition and applicable testing requirements for the specified casting grade

Typical Grades

CF8 and CF3 — Austenitic 19Cr-9Ni stainless steel castings
CF8M and CF3M — Molybdenum-bearing austenitic stainless steel castings
CF8C — Niobium-stabilized austenitic stainless steel casting
CG3M and CG8M — Molybdenum-bearing austenitic stainless steel castings
CN7M and CN7MS — Nickel-rich, copper- and molybdenum-bearing corrosion-resistant castings
CN3MN — Nitrogen-alloyed, molybdenum-bearing austenitic stainless steel casting
CK3MCuN — Molybdenum- and copper-bearing nitrogen-alloyed stainless steel casting
CN3MCu — Nickel-rich, copper- and molybdenum-bearing corrosion-resistant casting

Documents We Supply

Material Test Certificate, as specified in the purchase order
Chemical composition and mechanical test results, as applicable
Heat-treatment records, where applicable
Inspection and supplementary testing reports, when ordered and available
PMI and third-party inspection on request

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ASTM A890/A890M

Duplex stainless steel castings for general application

Steel Castings Stainless Steel Duplex Corrosion Resistant Ferritic-Austenitic High-Strength Steel

What it covers

Covers

Duplex (austenitic-ferritic) stainless steel castings for general corrosion-resistant applications
Cast components requiring a combination of strength and corrosion resistance
Heat treatment and chemical composition requirements for the specified casting grade
Mechanical property and testing requirements applicable to the selected grade

Typical Grades

Grade 1B — UNS J93372, ACI CD4MCuN
Grade 1C — UNS J93373, ACI CD3MCuN
Grade 2A — UNS J93345, ACI CE8MN
Grade 3A — UNS J93371, ACI CD6MN
Grade 4A — UNS J92205, ACI CD3MN
Grade 5A — UNS J93404, ACI CE3MN
Grade 6A — UNS J93380, ACI CD3MWCuN
Grade 7A — UNS J93379, ACI CD3MWN

Documents We Supply

Material Test Certificate, as specified in the purchase order
Chemical composition and mechanical test results, as applicable
Heat-treatment records, where applicable
Inspection and supplementary testing reports, when ordered and available
PMI and third-party inspection on request

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BS EN 10222-5

Martensitic, austenitic and austenitic-ferritic stainless steel forgings

ForgingsStainlessDuplexX2CrNiMo17-12-2

What it covers

Covers

Stainless forgings for pressure purposes
Chemical composition and mechanical properties
Heat treatment and testing requirements

Typical grades

X2CrNiMo17-12-2
X5CrNi18-10
X2CrNiMoN22-5-3

Documents we supply

Inspection certificate (EN 10204 3.1)
Third-party inspection on request

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BS EN 10222-4

Weldable fine-grain steel forgings with high proof strength

ForgingsFine-grain steelHigh proof strength

What it covers

Covers

Forgings for pressure purposes
Weldable fine-grain steels
Material, heat treatment and inspection requirements

Typical grades

Grades per the standard

Documents we supply

Inspection certificate (EN 10204 3.1)
Third-party inspection on request

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BS EN 10213

Steel castings for pressure purposes

Castings Pressure Purposes Ferritic & Martensitic Austenitic & Duplex

What it covers

Covers

Steel castings for pressure purposes
Ferritic and martensitic steel castings
Austenitic and austenitic-ferritic steel castings
Chemical composition and mechanical properties
Heat treatment, inspection and testing requirements

Typical grades

GP240GH (1.0619)
GP280GH (1.0625)
G17Mn5 (1.1131)
G20Mn5 (1.6220)
G17CrMo5-5 (1.7357)
G17CrMo9-10 (1.7379)
GX5CrNi19-10 (1.4308)
GX5CrNiMo19-11-2 (1.4408)
GX2CrNiMoN22-5-3 (1.4470)

These are examples, not the complete grade list.

Documents we supply

Inspection certificate (EN 10204 3.1)
Third-party inspection on request

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BS EN 10250-4

Steel forgings for general engineering purposes — Stainless steels

Open Die Forgings Stainless Steel Austenitic & Duplex Ferritic & Martensitic

What it covers

Covers

Stainless steel open die forgings for general engineering purposes
Ferritic and martensitic stainless steel grades
Austenitic stainless steel grades
Austenitic-ferritic (duplex) stainless steel grades
Chemical composition and mechanical properties
Heat treatment, inspection and testing requirements

Typical grades

X5CrNi18-10 (1.4301)
X2CrNi18-9 (1.4307)
X2CrNiMo17-12-2 (1.4404)
X5CrNiMo17-12-2 (1.4401)
X6CrNiTi18-10 (1.4541)
X6CrNiNb18-10 (1.4550)
X12Cr13 (1.4006)
X20Cr13 (1.4021)
X2CrNiMoN22-5-3 (1.4462)
X2CrNiMoN25-7-4 (1.4410)

These are illustrative examples. Confirm each designation against the applicable edition before publication.

Documents we supply

Inspection certificate (EN 10204 3.1)
Third-party inspection on request

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BS EN 10272

Stainless steel bars for pressure purposes

Stainless Steel Bars Pressure Purposes Ferritic & Martensitic Austenitic Duplex

What it covers

Covers

Technical delivery conditions for hot- and cold-formed stainless steel bars for pressure purposes
Ferritic and martensitic stainless steel grades
Austenitic stainless steel grades
Austenitic-ferritic (duplex) stainless steel grades
Chemical composition and mechanical properties
Heat treatment, surface quality, inspection and testing requirements

Typical grades

X2CrNi12 (1.4003)
X12Cr13 (1.4006)
X5CrNi18-10 (1.4301)
X2CrNi18-9 (1.4307)
X2CrNiMo17-12-2 (1.4404)
X5CrNiMo17-12-2 (1.4401)
X6CrNiTi18-10 (1.4541)
X6CrNiNb18-10 (1.4550)
X2CrNiN23-4 (1.4362)
X2CrNiMoN22-5-3 (1.4462)

These are examples from the 2007 edition, not the complete grade list. Confirm the applicable edition before specifying material.

Documents we supply

Inspection certificate (EN 10204 3.1), as specified in the purchase order
Chemical composition and mechanical test results, as applicable
Heat-treatment records, where applicable
Third-party inspection on request

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BS EN 10283

Corrosion resistant steel castings

Steel Castings Corrosion Resistant Martensitic Austenitic Duplex

What it covers

Covers

Corrosion-resistant steel castings for general purposes
Martensitic stainless steel grades
Austenitic stainless steel grades
Fully austenitic stainless steel grades
Ferritic-austenitic (duplex) stainless steel grades
Chemical composition and mechanical properties
Heat treatment, inspection and testing requirements
Corrosion behaviour and applicable testing requirements

Typical grades

GX12Cr12 (1.4011)
GX4CrNi13-4 (1.4317)
GX5CrNi19-10 (1.4308)
GX5CrNiMo19-11-2 (1.4408)
GX5CrNiNb19-11 (1.4552)
GX2NiCrMo28-20-2 (1.4458)
GX2CrNiMoN22-5-3 (1.4470)
GX2CrNiMoN25-6-3 (1.4468)
GX4CrNiMoN26-5-2 (1.4474)
GX2CrNiMoN26-7-4 (1.4469)

These are illustrative examples from the 2010 edition, not the complete grade list. Confirm the applicable edition and grade designation before specifying material.

Documents we supply

Inspection certificate (EN 10204 3.1), as agreed in the purchase order
Chemical composition and mechanical test results, as applicable
Heat-treatment records, where applicable
Non-destructive testing documentation, where specified
Third-party inspection on request

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