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Stainless Steel Alloy 254 Plates

Excellent resistance at normal temperatures and also has good resistance to oxidizing and carburizing atmospheres

Alloy 254 Plate is a molybdenum-bearing austenitic stainless steel with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steels such as Alloy 304. In addition, Alloy 254 offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures than conventional stainless steels. It is a low carbon or "L" grade which provides resistance to sensitization during welding and other thermal processes.

Good oxidation resistance in intermittent service to 900 °C and in continuous service to 925 °C. These grades perform well in the 425-900 °C range, and particularly where subsequent aqueous corrosive conditions are present. 321H has higher hot strength, and is particularly suitable for high temperature structural applications.

Stainless Steel plates, also commonly known as Cold Rolled products, are available in the following finishes: 2B, No.4 with PVC and BA with PVC and all decorative and designer stainless steel sheets are available at Calico Metal on request. Stainless Steel Sheets Standard lengths (in mm) are: 2000, 2500, 3000 and 6000. Standard widths (in mm) are 1000, 1250 and 1500. All material is produced to the following international specifications: tolerance to ASTM A480m, chemical to ASTM A240 91A, mechanical to ASTM A240 91 and Calico Metal provides stainless steel plates with Mill test Certificate or Third party inspection certified material only.

Alloy 254 Plate is a titanium stabilized austenitic stainless steel with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 – 1500°F (427 – 816°C). The alloy resists oxidation to 1500°F (816°C) and has higher creep and stress rupture properties than alloys 304 and 304L. It also possesses good low temperature toughness. Alloy 254 is the higher carbon (0.04 – 0.10) version of the alloy. It was developed for enhanced creep resistance and for higher strength at temperatures above 1000oF (537°C). In most instances, the carbon content of the plate enables dual certification. Alloy 321 cannot be hardened by heat treatment, only by cold working. It can be easily welded and processed by standard shop fabrication practices.

Applications

  • Aerospace – piston engine manifolds
  • Chemical Processing
  • Expansion Joints
  • Food Processing – equipment and storage
  • Petroleum Refining – polythionic acid service
  • Waste Treatment – thermal oxidizers

Benefits

  • Higher creep stress and rupture properties when compared with 304
  • Ideal for high temperature service
  • Overcomes sensitization and intergranular corrosion concerns
  • Can be used in elevated temperature applications for ASME Boiler and Pressure Vessel Code applications
  • Due to stabilisation the material offers better overall corrosion resistance when compared to 304/304L
  • Excellent mechanical properties

Chemical Composition

Grade C Mn Si P S Cr MO Ni CU
Alloy 254 Min - - - - - 12.0 - - -
max 0.15 1.00 1.00 0.04 0.03 14.0 - - -

Mechanical Properties

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) Brinell (HB)
Alloy 254 95,000 50,000 25 - 175

Physical Properties

Grade Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion
(mm/m/°C)
Thermal Conductivity
(W/m.K)
Specific Heat 0-100°C (J/kg.K) Electrical Resistivity (nW.m)
Alloy 254 0-100°C 0-315°C 0-538°C at 100°C at 500°C
-7750 200 10.4 11.0 11.4 23.9 26.0 460 600

Calico Metal Alloys LLP exports their products to countries like UAE, Bahrain, Italy, Indonesia, Malaysia, United States, Mexico, Chine, Brazil, Peru, Nigeria, Kuwait, Jordan, Dubai, Thailand (Bangkok), Venezuela, Iran, Germany, UK, Canada, Russia, Turkey, Australia, New Zealand, Sri Lanka, Vietnam, South Africa, Kazakhstan & Saudi Arabia.

Stainless Steel & Special Alloys Materials