SMLease Design

Mechanical Product Design & Development Partner

Sheet Metal Materials

Various types of materials are available for the manufacturing of sheet metals parts. Selection of type of material and grade is done depending on required strength, corrosion resistance, assembly process  and overall cost. 

You can contact us for any kind of mechanical design services and for any support in selection of material for your sheet metal product.


CRCA (Cold Rolled close annealed Steel Sheets)

  • After hot rolling and pickling, the steel is cold rolled to a reduced thickness (which makes it brittle and not too useful), which is then followed by annealing in a closed atmosphere of nitrogen or other non-oxidizing gases (which softens it back up while protecting it from oxidation).
  • CRCA steel is highly prone to rusting. Oil is applied after the annealing, and this will add at least a little short term rust resistance.
  • CRCA steel sheets has superior surface quality and dimensional accuracy
  • Low Cost

Some of the commonly used sheet metal grades are:

  • CR1/390 (Ordinary Quality)
  • CR1/440 (Ordinary Quality)
  • CR2/D (Drawing Quality)
  • CR3/ DD (Deep Drawn Quality)
  • CR4 / EDD (Extra Deep Drawn Quality)
  • CR5 (Interstital Free)

Manufacturer datasheets for CRCA Grade sheets:


Galvanised Steel sheet


  • Galvanised Steel is a steel grade with Zinc coating to improve steel corrosion resistance. GI Steel is available in ordinary (O), Drawing (D), Deep Drawing (DD), Extra Deep Drawing (EDD) Grade steel with various coating thickness.
  • Galvanised steel is further classified based on zinc plating thickness e.g. 600gsm, 450gsm, 350gsm, 275gsm, 220gsm, 200gsm, 180gsm, 120gsm
  • 600gsm means 600 gram zinc coating in one square meter of steel area.



Aluzinc Steel Sheets


Aluzinc is a grade of steel with aluzinc coating on steel surface

  • Aluminium‐zinc (AZ) coating on steel sheeting consists of nominally 55 % aluminium, 43,4 % zinc and 1,6 % silicon, and it is applied by hot dipping in a molten bath. 
  • In AZ coating, layer consists of two components: an aluminium‐rich phase and a zinc‐rich phase.
  • Coating microstructure consists of approximately 80 % of an aluminium‐rich phase and 20 % of  zinc‐rich phase with a thin intermetallic layer that metallurgically bonds the coating to the steel substrate.
  • In the case of the AZ coating, there is an additional aluminium barrier coating, as well as a zinc‐rich component that effectively provides sacrificial protection against corrosion at cut edges and where there is other
    mechanical damage.



Aluminium Steel Sheets

After iron, aluminium is now the second most widely used metal in the world.

  • Low Density / Weight
  • High Strength
  • Superior Malleability
  • Excellent Corrosion Resistance
  • Good Thermal and Electrical Conductivity
  • Recyclable

Some of the commonly used Aluminium sheet metal grades are:

  • 5052 - H32 : Good Formability, Commonly used sheet grade, 
  • 5052 - H34 : Fair Formability, excellent corrosion resistance & Welding charecterstics
  • 1050 - H14 : Good Weldability
  • 6061
  • 5251- H22 : used in marine environments



Stainless Steel Sheets

Stainless steel is a corrosion resistant alloy steels containing 10.5% or more chromium. All stainless steels have a high resistance to corrosion. This resistance to attack is due to the naturally occurring chromium-rich oxide film formed on the surface of the steel. Although extremely thin, this invisible, inert film is tightly adherent to the metal and extremely protective in a wide range of corrosive media. The film is rapidly self repairing in the presence of oxygen, and damage by abrasion, cutting or machining is quickly repaired. 

  • Good Corrosion Resistance
  • Ease of fabrication
  • Hygienic Grades are available
  • Good Weldability

Some of the commonly used stainless steel sheet metal grades are

  • SS 304
  • SS 304 L
  • SS 304 H
  • SS 316


You can contact us for any kind of mechanical design services and for any support in selection of material for your sheet metal product.

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