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Sulphuric Acid on the WebTM Technology Manual DKL Engineering, Inc.

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Knowledge for the Sulphuric Acid Industry
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Introduction
General
Definitions
Instrumentation
Plant Safety
Metallurgial Processes
Metallurgical
Sulphur Burning
Acid Regeneration
Lead Chamber
Technology
Gas Cleaning
Contact
Strong Acid
Acid Storage
Loading/Unloading
Transportation
Sulphur Systems
Liquid SO2
Boiler Feed Water
Steam Systems
Cooling Water
Effluent Treatment
Utilities
Construction
Maintenance
Inspection
Analytical Procedures
Materials of Construction
Corrosion
Properties
Vendor Data

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Materials of Construction - Sandvik HT 9067
June 6, 2005

Introduction
Corrosion Resistance
Properties
Approvals		 Associated Links

Sandvik SX

Introduction 

Sandvik HT 9067 is a patented duplex stainless steel developed and adapted for use in hot concentrated sulphuric acid.  It exhibits excellent corrosion resistance to sulphuric acid including when fluorides are present.  It is resistant to chlorides, pitting and crevice corrosion and stress corrosion cracking.  The material can be easily worked and has good weldability.  Sandvik HT has very high strength as do most duplex stainless steels.

The above properties make Sandvik HT ideal for the following applications in the sulphuric acid industry:

  • Low pressure steam boilers
  • BFW heaters
  • Heat recovery systems
  • Seawater acid coolers

Sandvik HT will experience accelerated corrosion if the acid contration drops below 97% acid.

Properties

Mechanical

Yield Strength (0.2% offset) minimum 200°C 470 MPa
Tensile Strength 200°C 720 MPa
Elongation 200°C       25%

Physical

Thermal Conductivity   20-300°C   13-18 W/m °C
Thermal Expansion 30-300°C  12.5 x 10-6 per °C
Modulus of Elasticity  20-200°C     200,000-186,000 MPa

Approvals

ASME Code Case

PED-PMA

 

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DKL Engineering, Inc. shall not be held liable for any type of damages resulting from the use of this information. The user assumes all risk and liability in connection with the use of information contained in this and associated web sites.  The data is intended for personal, non-commercial use.