Duplex Stainless Steel – Properties, Grades & Manufacturing
All you need to know about Duplex Stainless Steel to explore our casting technologies below. Our company covers a wide range of casting technologies, from traditional sand casting to high-precision investment casting and sand casting solutions.
What is Duplex Stainless Steel
A duplex stainless steel is defined as one that contains a two-phase structure and is more often a descriptor of an alloy where both phases are present in significant quantities. Combine some of the best features of austenitic and the ferritic grade, it has excellent chloride stress corrosion cracking resistance. its comprised of approximately 50% ferrite and 50% austenite. Duplex stainless steel names often reflect their chemical composition or are proprietary designations. Generally, there are two families: duplex stainless steel and super dulex stainless steel.
Ferrite levels are not specified, but these alloys will develop a range of approximately 30 to 60 % ferrite with the balance austenite.
There are more than 200 different grades of stainless steel. but there are five families of stainless steel: Austenitic Stainless Steel, Ferritic Stainless Steel, Martensitic Stainless Steel, Duplex Stainless Steel, and Precipitation-hardening Stainless Steel.
Some Typical Duplex Stainless Steel
- CD4MCu Casting
- CE8MN Casting
- CD4MCuN Casting
- CD3MN Casting, SS2205
- CE3MN Casting, SS2507
ASTM Standards for Duplex Stainless Steel
ASTM A182/A182M-2024: Forged or rolled alloy-steel pipe flanges, forged fittings, and valves and parts for high-temperature service
ASTM A240/A240M-2024: Heat-resisting chromium and chromium-nickel stainless steel plate, sheet and strip for pressure vessels
ASTM A268/A268M-2024: Seamless and welded ferritic and martensitic stainless steel tubing for general service
ASTM A276-2024: Stainless steel bars and shapes
ASTM A297/A297M-2024: Steel castings, iron-chromium and iron-chromium-nickel, heat resistant, for general application
ASTM A314-2024: Stainless steel billets and bars for forging
ASTM A351/A351M-2024: Castings, austenitic, austenitic-ferritic (duplex), for pressure-containing parts
ASTM A473-2024: Stainless steel forgings
ASTM A479/A479M-2024: Stainless steel bars and shapes for use in boilers and other pressure vessels
ASTM A743/A743M-2024: Castings, iron-chromium and iron-chromium-nickel, corrosion-resistant, for general application
ASTM A744/A744M-2024: Castings, iron-chromium-nickel, corrosion-resistant, for severe service
ASTM A789/A789M-2024: Seamless and welded ferritic/austenitic stainless steel tubing for general service
ASTM A790/A790M-2024: Seamless and welded ferritic/austenitic stainless steel pipe
ASTM A815/A815M-2024: Wrought ferritic, ferritic/austenitic, and martensitic stainless steel piping fittings
ASTM A872-2024: Centrifugally cast ferritic/austenitic stainless steel pipe for corrosive environments
ASTM A890/A890M-2024: Castings, iron-chromium-nickel-molybdenum corrosion resistant, duplex (austenitic/ferritic) for general application
ASTM A928/A928M-2024: Ferritic/austenitic (duplex) stainless steel pipe electric fusion welded with addition of filler metal
ASTM A949/A949M-2024: Spray-formed seamless ferritic/austenitic stainless steel pipe
European Standards (EN) for Duplex Stainless Steel
EN 10028-7-2023: Flat products made of steel for pressure vessel purposes. Part 7: Stainless steels
EN 10088-1-2023: Stainless steels – Part 1: List of stainless steels
EN 10088-2-2023: Stainless steels – Part 2: Technical delivery conditions for sheet/plate and strip for general purposes
EN 10088-3-2023: Stainless steels – Part 3: Technical delivery conditions for semi-finished products, bars, rods and sections for general purposes
EN 10250-5-2023: Open die steel forgings for general engineering purposes – Part 5: Stainless steels
EN 10272-2023: Stainless steel bars for pressure purposes
NACE Standard for Duplex Stainless Steel
NACE MR0175-2023: Sulfide stress corrosion cracking resistant materials for oilfield equipment
Casting Methods for Duplex Stainless Steel
Different casting methods are selected based on part size, weight, tolerance and production volume.
Not Sure Which Casting Process Fits Your Project?
The process for Duplex Stainless Steel castings will be chosen by steel grade, design and quantity. As a professional supplier in the metal casting industry, we have over 15 years of experience in OEM manufacturing. Our engineers will recommend the most suitable process, material, and cost solution within 24–48 hours.
Key Properties of Duplex Stainless Steel
Popular Stainless Steel Grade Comparison
Most stainless steel casting grades comparison across international standards including GB, ASTM, DIN, JIS, and ISO.
| Index | China | Japanese | USA | Russia | Germany | Italy | France | England | India | Spanish | Mexico | Australia | Sweden | Bulgaria | Taiwan | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (GB) | (JIS) | ASTM | UNS | (TOCT) | DIN | W-Nr. | (UNI) | (NF) | (BS) | (IS) | (UNE) | (DGN) | (AS) | (SS14) | (BDS) | (CNS) | |
| 1 | ZG1Cr13 | SCS1 | CA-15 | J91150 | 15X13Л | G-X7Cr13 G-X10Cr13 | 1.4001 1.4006 | GX12Cr13 | Z12C13M | 410C21 | — | — | — | H3A | 2302 | 1Ch13 | SCS1 |
| 2 | ZG2Cr13 | SCS2 | CA-40 | J91153 | 20X13Л | G-X20Cr14 | 1.4027 | GX30Cr13 | Z20C13M | 420C29 | 7typel | — | CA-40 | — | — | — | SCS2 |
| 3 | ZG1Cr17 | ∽SCS24 | — | — | 12X17 | ∽X8Cr18 | 1.4015 | — | — | — | — | — | — | — | — | — | ∽SCS24 |
| 4 | ZGCr28 | — | — | — | — | G-X70Cr29 G-X120Cr29 | 1.4085 1.4086 | — | Z130C29M | 452C11 | — | — | — | — | 2320 | — | — |
| 5 | ZG00Cr18Ni10 | SCS19 | CF-3 | J92500 | 03X18H11 | G-X2CrNi18 9 | 1.4306 | GX2CrNi19 10 | Z2CN18.10M | 304C12 | — | AM-X2CrNi19 10 | — | — | — | 000Ch18N11 | SCS19 |
| 6 | ZG0Cr18Ni9 | SCS13 | CF-8 | J92600 | 07X18H9Л | G-X6CrNi18 9 | 1.4308 | — | Z6CN18.10M Z6CN19.9M | 304C15 | — | AM-X7CrNi20 10 | CF-8 | H5A | 2352 | 0Ch18N9L | SCS13 |
| 7 | ZG1Cr18Ni9 | SCS12 SCS13A | — | — | 10X18H9Л | G-X10CrNi18 8 | 1.4312 | — | Z10CN18.9M | 302C25 | — | — | — | — | 2333 | — | SCS12 SCS13A |
| 8 | ZG0Cr18Ni9Ti | SCS21 | CF-8C | J92710 | 08X18H9T | G-X5CrNiNb18 9 | 1.4552 | — | Z4CNNb19.10M | 347C17 | — | AM-X7CrNi20 10 | CF-8C | — | — | 0Ch18N9L | SCS21 |
| 9 | ZG1Cr18Ni9Ti | — | — | — | 12X18H9T | — | — | — | — | — | — | — | — | — | — | — | — |
| 10 | ZG0Cr18Ni12Mo2Ti | — | CF-8M | J92900 | — | — | — | GX6GrNiMo20 11 | — | — | — | AM-X7CrNiMo20 10 | CF-8M | H6C | — | 0Ch18N10M2L | — |
| 11 | ZG1Cr18Ni12Mo2Ti | SCS22 | — | — | — | G-X5CrNiMoNb18 10 | 1.4581 | — | Z4CNDNb18.12-M | 318C18 | — | — | — | — | 2343 | — | SCS22 |
| 12 | — | SCS14 | CN-7M | J95150 | — | G-X12Cr14 | 1.4008 | — | Z12CN13-M | 316C16 | — | — | CN-7M | — | — | — | SCS14 |
| 13 | — | SCS5 SCS6 | — | — | — | G-X5CrNi13 4 | 1.4313 | — | Z4CND13.4-M | 425C11 | — | — | — | — | — | — | SCS5 SCS6 |
| 14 | — | — | CF-3 CF-3M | J92700 J92800 | — | G-X2CrNiMo18 10 | 1.4404 | GX2CrNi19 10 | Z2CND18.12-M Z3CND19.10-M | — | — | AM-X2CrNiMo19 11 | CF-3M | — | 2385 | 000Ch17N14M2 | — |
| 15 | — | — | CA-15 | J91150 | — | G-X5NiCrMo13 4 | 1.4407 | GX12Cr13 | Z6CND13.04-M | 405C29 | — | — | — | — | 2348 | — | — |
| 16 | — | — | — | J92810 | — | G-X6CrNiMo18 12 | 1.4437 | — | Z4CND19.13-M | — | — | — | — | — | — | — | — |
| 17 | — | — | CG-8M | J93000 | — | G-X6CrNiMo17 13 | 1.4448 | GX6CrNiMo20 11 03 | — | 317C16 | — | AM-X7CrNiMo20 11 | CG-8M | H6A | 2353 | — | — |
| 18 | — | SCS14A | — | — | — | G-X10CrNiMo18 8 | 1.441 | — | Z5CND20.10-M | — | — | — | — | — | — | — | SCS14A |
| 19 | ZG5Cr25Ni2 | SCH2 | HC | J92605 | — | G-X40CrNi24 5 G-X40CrNiSi27 4 | 1.4822 1.4823 | GX35Cr28 | — | 452C11 | — | AM-X40Cr28 | HC | — | — | 4Ch26SL | SCH2 |
| 20 | ZG3Cr18Ni25Si2 | SCH19 | HN | J94213 | — | — | — | — | — | 3X18H25C2 | 11 | — | HN | — | — | — | SCH19 |
| 21 | ZG1Cr25Ni20Si2 | SCH21 | HK-30 | J94203 | 15X23H18Л | G-X15CrNiSi25 20 | 1.484 | GX40CrNi26 20 | — | — | 10 | AM-X40CrNi25 20 | — | — | — | — | SCH21 |
| 22 | ZG4Cr25Ni20Si2 | SCH22 | HK HK-40 | J94224 J94204 | — | G-X40CrNiSi25 20 | 1.4848 | GX40CrNi26 20 | — | 310C40 310C45 | 11 | AM-X40CrNi25 20 | HK | H8E2 | — | — | SCH22 |
| 23 | — | SCH13A SCH17 | HH | J93503 | 40X24H12CЛ | G-X40CrNiSi25 21 | 1.4837 | GX35CrNi25 12 | — | 309C30 | 7tgpel | — | HH | H8B | — | — | SCH13A SCH17 |
| 24 | ZG4Cr25Ni35Si2 | SCH24 | HP | J95705 | — | G-X45CrNiSi35 25 | 1.4857 | GX50NiCr35 25 | — | — | — | — | HP | — | — | — | SCH24 |
| 25 | — | SCH16 SCH15 | HT | J94605 | — | G-X40CrNiSi38 18 | 1.4865 | GX50NiCr39 19 | — | — | 12 | — | — | — | — | — | SCH16 SCH15 |
| 26 | — | SCH1 SCH3 | CA-40 | J91153 | — | G-X40Cr13 | 1.4034 | GX35Cr13 | Z30C13-M Z28C13-M | — | — | — | — | — | 2183 | — | SCH1 SCH3 |
Duplex Stainless Steel Grade Details
-
Duplex Stainless Steel CE3MN (SS2507)
Super Duplex Stainless Steel CE3MN (SS2507) in ASTM A890/A895 standard for casting purpose
-
Duplex Stainless Steel CD3MN/SS2205
CD3MN is a Fe-Cr-Ni-Mo duplex stainless steel
-
CD4MCu-Duplex Stainless Steel-Casting Material
Duplex Stainless Steel CD4MCu (UNS J93370) in ASMT A351 and ASTM A890
Duplex Stainless Steel Application
Duplex stainless steel casting have found widespread use in the chemical and petrochemical industries.
Chemiscal industry: Used for valves, pump shafts, mechanical seals, pressure vessels, and fasteners on offshore drilling platforms, taking advantage of its excellent resistance to stress corrosion cracking.
Nuclear and power generation industry: Used in nuclear reactor components, turbine blades, and critical structural parts.
Medical devices: Used in surgical instruments and medical device components due to its high strength and good corrosion resistance.
Pulp and chemical industries: Used in pumps, valves, and agitators handling corrosive media such as chlorides.
Some castings with Stainless Steel Material:
-
Pump Casting-Impeller
-
Pump Casting-Body
-
Stainless Steel Adapter Casting
-
Pump Suction Cover Casting
-
Stainless Steel Pump Head
-
Austenitic Stainless Steel Casting
Why Use Casting Quality
- 24-48 hour quotation response ✔
- Engineering support before production ✔
- Strict supplier qualification system ✔
- On-site inspection available ✔
- Process-Based Supplier Matching ✔
- Material & Capability Filtering ✔
- Time-Saving Sourcing Process ✔
- Reliable and Transparent Information ✔
Start Your Sourcing Today
Send Your Drawings & Get a Casting Quote in 24–48 Hours