• Stainless and Engineering Steel Bar and Wire

Stainless Steel Bar & Wire
Round Bar 3.0 to 304.8mm
Wire 1.0 to 5.5mm
Angle Bar 20 to 100mm section; 3.0mm to 12.0mm thickness
Flat bar 12 to 150mm wide; 3 to 25mm thickness
Channel Bar 80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness
Hexagonal Bar 6.35 to 63.5mm A/F
Hollow Bar 32mm OD x 16mm ID to 250mm OD x 200mm ID)
Grades 303, 304, 304L, 316, 316L, 321, 416, 431, 2205, 630, Improved Machining (303,304,316)
Condition Hardened & tempered, annealed
Finishes Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed
Processing Bar cutting to 650mm

For detail of stainless steel bar products and the Atlas range please select the relevant product group of your interest from the dropdown shown in the “Stainless and Engineering Steel Bar and Wire” menu bar.

Stainless Steel Bar
Stainless steel bar comprises numerous products referred to by the shape, the section dimension, grade, condition and surface finish.

Shapes and section dimension measurement
The following shows the variety of shapes commonly available in stainless steel bar and the dimensional designation for its shape

Round bar: Measured across the diameter.
Square bar: Measured across the flats (AF).
Hexagonal bar: Measured across the flats (AF).
Flat bar: Measured width x thickness.
Channels: Measured flange x web x thickness.
Hollow bar: Measured outside diameter (OD) x inside diameter (ID).

Common Stainless Steel Bar Grades
The following are common grades available in stainless steel bar, which is not an exhaustive list and other grades may be available for specialised application. In such cases please contact the Atlas local Service Centre.

303 Free-machining bar grades
304, 304L Standard 18/8 grades
316, 316L Improved resistance to pitting corrosion in chloride environments
321 Stabilised grades for heavy section welding and high temperature applications
253MA High temperature resistant grade
416 Free-machining bar grade
431 High hardness and toughness grade, primarily for shafting
2005 Standard duplex stainless steel – high resistance to pitting and stress corrosion
630 (17-4PH) High strength shafting grade

A post production operation where heat is used to achieve a desired hardness to suit the end use application

H&T Hardened and tempered.
ANN Annealed
PH Precipitation hardened.

Surface finish
This is the surface condition of the bar, which is usually designated at the time of order. Generally this ranges from rough hot mill finished in the case of forging bar to very smooth centreless ground in the case of engineering component. bar.

CD Cold drawn P Polished
BD Bright drawn SRE Slit rolled edge
CG Centreless ground HF Hot finished
CF Cold finished HRAP Hot rolled annealed and pickled
P&T Peeled and turned RT Rough turned/peeled
ST Smooth turned PR Peeled and reeled

Dimensional tolerances for bar
This is the product dimensional tolerance required by the end user and produced by the mill usually from the drawing, peeling or grinding process.

Forms and conditions: stainless steel bar

Round Square Hexagonal
Precision ground Cold drawn Cold finished/smooth turned
h8 or h9 h9 h10 h11 h11

For further technical information on these products refer to the relevant section of the Atlas Product Reference Manual. There is other technical and product information contained within the Technical Library of this website.

Stainless Steel Improved Machining Bar
Atlas Steels distributes Ugima and other brands of “Improved Machining” stainless steel bar. Improved machining bar is a result of a controlled melting process, giving high chip-breaking properties and providing a self-lubricating quality through the processing of machining.

The benefits of Improved Machining grade

  • Improved machining.
  • Increased cutting speeds.
  • Lower unit cost of production.
  • Increased tool life.
  • Lower production power requirements.
  • Consistent machining characteristics.
  • Improved product surface finish.
  • Chemical composition within ASTM standards.
  • Properties the same as commercial grades of stainless steel
    – high corrosion resistance
    – similar mechanical properties
    – easily welded
    – good formability.
  • Improved drilling and tapping characteristics.

Improved Machining grade will reduce wear on tools and extend tool life
Highly abrasive inclusions which damage tools are excluded in the IM manufacturing steel melt process. There is a decrease in flank wear and crater wear of carbide tooling which results in:

  • less dismounting and reassembling of tools;
  • less adjustment time; and
  • there is a noticeable improvement in the life of cutting tools.

Improved Machining grade will enable higher cutting speeds
To benefit fully from Improved machining grade stainless steel bar and it’s unique characteristics minor modification is required to cutting conditions in particular, it is necessary to increase cutting speeds.

Engineering Steel Bar

Atlas Steels stocks a wide variety of engineering steel bar products which are:

  • Bright Mild Steel Bar
  • Carbon Steel Bar
  • Alloy Steel Bar
  • Hard Chrome Bar (carbon and Alloy)
  • Hollow Bar (Carbon and Alloy)

Bar shape is primarily solid round, hollow round, hexagonal, square and flat.
For detail of engineering steel bar products and the Atlas range please select the relevant product group of your interest from the dropdown shown in the “Stainless and Engineering Steel Bar and Wire” menu bar.

Technical Handbook of Stainless and Engineering Steel Bar Products

This download is a comprehensive (132 pages) technical handbook of Stainless and Engineering Steel Bar Products published by Atlas Steels containing the following information;

  • The Atlas Product Program
  • Stocking Range of stainless and engineering steel bar
  • Properties of steel grades
  • Grade data sheets
  • Non destructive testing
  • Heat Treatment and surface treatment of steels
  • Machining characteristics and machining data sheets
  • Technical data such as tolerances and conversion charts

PDFTechnical Handbook of Bar Products (2.27 Mb)