Stainless Steel Bar and Angel

   

Round Bar                Hexagonal Bar                        Flat Bar                           Square Bar

Round Tube                                    Angel Bar                                  Square Tube

Product Stocking and Processing

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

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

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

Condition
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

Stainless Steel Bar - Round

Stainless steel round bar besides having the characteristics or corrosions resistance has been developed over time to encapsulate end user applications. For example, Improved Machining (IM) grades have been developed to enhance machining of the steel into components, grades for hardness by responding to heat treatment and grades with high corrosion qualities by adding additional elements to give it the characteristics desired.

Atlas stocks a comprehensive range of grade, and sizes of stainless steel round bar to cover most machining and structural applications.

Product Stocking and Processing

Stainless Steel Round Bar
Standard	ASTM A276
Condition	25.4mm and less generally drawn, above 25.4mm and less than 101.6mm is generally annealed, turned and polished. Sizes above 101.6mm are generally rough turned to k12 tolerance. Grades 431 and 2205 are often stocked in a smooth turned or centreless ground finish.
Size Range	3 to 304.8 mm (diameter)
Grades	303, 304/304L, 316/316L, 431 H&T, 2205, Improved Machining (303, 304, 316)
Processing	Bar cutting

Bar Grade Datasheets 

Grade	Description
303	303 grade represents the optimum in machining among the austenitic stainless steels. It is primarily used when production involves extensive machining. 303 is available in Improved Machining grade with machining characteristics significantly higher than that of the standard 303.
304	304 grade is dual certified as grade 304 and 304L. Grade 304 is the standard "18/8" stainless. It has excellent forming and welding characteristics. Grade 304L, the low carbon version of 304, does not require post-weld annealing and so is extensively used in heavy gauge components. 304 is available in Improved Machining grade with machinability significantly higher than that of the standard 304.
316	316 grade is dual certified as grade 316 and 316L. 316 is the standard molybdenum-bearing stainless steel, second in importance to 304 amongst the austenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments. It has excellent forming and welding characteristics. 316 is available in Improved Machining grade with machinability significantly higher than that of the standard 316.
420	420 grade can be hardened by quench-and-temper heat treatment. It contains a minimum of 12 per cent chromium, just sufficient to give corrosion resistance properties. It has good ductility in the annealed condition but is capable of being hardened up to Rockwell Hardness 50HRC, the highest hardness of the 12 per cent chromium grades. Its best corrosion resistance is achieved when the metal is hardened and surface ground or polished. 420 is available in Improved Machining grade  with machinability significantly higher than that of the standard 420.
431	431 grade is a heat treatable martensitic, nickel-bearing grade has the best corrosion resistance properties of all the martensitic grades. It has excellent tensile and torque strength, and good toughness, making it ideally suited to shafting and bolt applications. It can be hardened to approximately 40HRC. Because of its high yield strength, this grade is not readily cold worked and is therefore not recommended for use in operations such as cold heading, bending, deep drawing or spinning. 431 is available as in Improved Machining grade with machinability significantly higher than that of the standard 431.
2205	2205 grade is the most widely used duplex (ferritic/austenitic) stainless steel grade. It finds applications due to both excellent corrosion resistance and high strength.
UR52N+	UR52N+ grade is one of a group of "super duplex" grades, combining high strength with exceptional corrosion resistance. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. UR52N+ is also very highly resistant to pitting/crevice corrosion in high chloride, hot environments. Its duplex structure also results in excellent resistance to stress corrosion cracking.

Stainless Steel Bar Angle

Product Stocking and Processing

Stainless Steel Angle Bar
Standard	ASTM A276
Condition	HRAP
Size Range	20 x 20 mm to 100 x 100 mm
Thickness	3 to 12 mm (depending on size)
Grades	304, 316
Processing	Bar cutting

Stainless Steel Bar Flat

Product Stocking and Processing

Stainless Steel Flat Bar
Standard	ASTM A276
Condition	HRAP or SRE
Size Range	Width 12 to 150 mm
Thickness	33 to 25 mm (depending on size)
Grades	304, 316
Processing	Bar cutting

Stainless Steel Bar Channel

Product Stocking and Processing

Stainless Steel Channel Bar
Standard	ASTM A276
Condition	HRAP
Size Range	Base: 80 to 150 mm Side: 40 to 75 mm
Thickness	5 to 6 mm (depending on size)
Grades	304, 316
Processing	Bar cutting

Stainless Steel Bar Square

Product Stocking and Processing

Stainless Steel Square Bar
Standard	ASTM A276
Condition	Cold drawn
Size Range	6 to 76.2 mm (across the flat)
Grades	304, 316
Processing	Bar cutting

Stainless Steel Bar Hexagonal

Product Stocking and Processing

Stainless Steel Hexagonal Bar
Standard	ASTM A276 and A582
Condition	Cold drawn
Size Range	Width 6.35 to 63.50 mm (across the flat)
Grades	304, 316, Improved Machining
Processing	Bar cutting

Stainless Steel Bar and Wire Product Specifications

Stainless Steel Bar

Standard	Description
AS 2837	Wrought alloy steels - stainless steel bars and semi-finished products.
ASTM A276	Stainless and heat resisting steel bars and shapes.
ASTM A564/A564M	Hot rolled and cold finished age-hardening stainless and heat resisting steel bars and shapes.
ASTM A582	Free machining stainless and heat resisting steel bars and hot rolled or cold finished.
ASTM A193/A193M	Alloy steels and stainless steel bolting materials for high temperature service.
ASTM A194/A194M	Carbon and alloy steel nuts for bolts for high pressure and high temperature service.
ASTM A320/A320M	Alloy steel bolting materials for low temperature service.
ASTM A453/A453M	Bolting materials, high temperature 345 to 827MPa yield strength with expansion co-efficients comparable to austenitic steels.
ASTM A479/A479M	Stainless and heat resisting steel bars and shapes for use in boilers and other pressure vessels.
ASTM A484/A484M	General requirements for stainless and heat resisting steel bars, billets and forgings.
EN 10088-3	Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods and sections for general purposes.

Stainless Steel Hollow Bar

Standard	Description
ASTM A511	Seamless stainless steel mechanical tubing.
ASTM A450/A450M	General requirements for carbon, ferritic alloy and austenitic alloy tubes.
DIN 17 456	General purpose seamless circular stainless steel tubes - ferritic and austenitic.