November 2, 2018

Duplex Stainless Steel CE3MN (SS2507)

CE3MN (SS2507) is super duplex stainless steel, with greater corrosive resistance than standard SS2205 and 18-8 Cr-Ni and 18-14-2/18-14-3 Cr-Ni-Mo stainless steel parts, mainly used for service in corrosive conditions. Casting UNS number is J93404.

Casting Material Standard: ASTM A890 and ASTM A995 Grade 5A; Type 25Cr-7Ni-Mo-N; Casting UNS J93404; ACI CE3MN;

Other similar Metal grades in different application:

ASTM A789 /ASTM A790/ASTM A276: Wrought UNS S32750; Wrought grade SS2507;

A182 F53

EN: X2CrNiMoN 25-7-4; WNr 1.4410;


Casting Quality Industrial provide Sand Casting and Investment Casting for this super duplex stainless steel.

Our Services

  1. Sand Casting

    Casting Quality focus on Metal Parts industry, we provide professional service in Metal Casting field.

    Sand Casting is a popular metal form method, are suitable for all materiel, such as grey iron, ductile iron, malleable iron, carbon steel, stainless steel, aluminum and bronze.

  2. Investment Casting

    also named as precision lost wax casting, mainly suitalbe for carbon steel and stainless steel parts. We also provide grey iron and ductile iron and aluminum and bronze parts by investment casting. It can achieve the best appearance with good tolerance

  3. Shell Casting

    Shell casting method is a good option to replace investment casting and sand casting. the quality is better than sand casting parts, suitable for bulk production.

  4. CNC Machining

    CNC Milling, CNC turning with 5 xix CNC center, we provide precision machining for all castings based on customers design drawings.

  5. CAD Design

    Mechanical Design service based on customers requirement, our software is Solidworks and AutoCAD.

  6. Tools/Mold Design

    Mould design and production will be served for metal casting ad plastic injection industry.  Based on our more than 10 years experience, we supply professional molds for our customers in Europe and North American.

Stainless Steel CE3MN (SS2507) Description

ASTM A890/890M Standard Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application

ASTM A995/995M Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts

CE3MN (SS2507) Chemical composition (nominal) %:

Carbon, max 0.03;

Manganese, max 1.50

Silicon, max 1.00

Phosphorus, max 0.04

Sulfur, max 0.04

Chromium 24.0-26.0

Nickel 6.0-8.0

Molybdenum 4.0-5.0

Nitrogen 0.10-0.30

%Cr+3.3 x %Mo+16 x %N≥40

CE3MN (SS2507) Mechanical Property:

Tensile Strength, min 100ksi [690Mpa];

Yield strength, min 75Ksi [515Mpa];

Elongation 18%


CE3MN Heat treatment process:

Heat to 2050°F [1120°C] minimum, hold for sufficient time to heat casting to temperature, furnace cool to 1910°F [1045°C] minimum, quench in water or rapid cool by other means.


CE3MN Hardness (not required): ≤HB300(HRC32)



Similar Steel material in other standards:

ASTM A182 Standard Specification for Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service

ASTM A240 Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications1

ASTM A790 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe

ASTM A789 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service

ASTM A479 Standard Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels

Steel GradeCMnPSSiNiCrMoNCu
ASTM A182 F53UNS S327500.031.20.0350.020.86-824-263-50.24-0.320.5
ASTM A240UNS S32750
Type 2507


UNS S327500.031.20.0350.020.86-824-263-50.24-0.320.5
ASTM A479UNS S327500.031.20.0350.020.86-824-263-50.24-0.320.5
Steel GradeTensileYieldElongationHardness
ASTM A182 F53UNS S32750116Ksi (800Mpa)80Ksi (550Mpa)15%310 HB
ASTM A240S32750
Type 2507
116Ksi (795Mpa)80Ksi (550Mpa)15%310 HB



UNS S32750116Ksi (800Mpa)80Ksi (550Mpa)15%300 HB (32 HRC)


CE3MN is also named as SS2507 in market. It’s a good super duplex stainless steel for offshore piping systems, couplings, centrifuge, dewatering equipment, pump, valves and, pulp digesters


CE3MN Typical Application


Metal Castings

Differential Mechanism Castings
Stainless Steel Pump Impellers
Cast Iron Cylinder
Volute Casting for Pumps
Duplex Stainless , , , , , ,

Leave a Reply

Your email address will not be published. Required fields are marked *

error: Alert: Thanks for your interesting, but Article is protected ! You can click the Top Right email!