Fluid Power Products

Hydraulic Cylinder and Chrome Bar

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Salem Steel NA is an industry leading supplier of premium quality tubing and bar, used for hydraulic cylinder application. After cold drawing and heat treating, our cylinder tubes will have the ID’s honed or skived and roller burnished (SRB) depending on your preference. Suitable to hone or SRB are also available with tolerances and guaranteed cleanup to be negotiated, depending on your requirements. We only work with ISO certified mills who undergoe a thorough audit by Salem's quality manager. These mills processing and inspections meet or exceed the U.S. standards.

Honing

Under the honing process, abrasive stones and paper are applied to the ID of the tube which “grinds” stock away to remove surface imperfections from the mill drawing process and to achieve the desired dimensional tolerances and surface finish. Utilizing the honing process, Salem Steel can offer tubing to ID dimensional tolerances as tight as .001”, and surface finish as smooth as 4-8 µin Ra. Tubing is available to meet various mechanical property requirements, as well as Charpy Impact properties 27 J (20 ft-lbs) @ -20ºC.

Bore Range – 1.000”- 9.843” (30-250 mm)
Max Length – 32.8’ (10 meters)
Surface Finish - 12 µin Ra max under 5.512” and 16 µin Ra max over 5.512”
Dimensional tolerance ISO – H9

Current Warehouse Stocking Sizes Produced to:

ASTM A513-5 (ERW-DOM), ST52.3
Yield: 75,000-95,000 PSI
Min Tensile: 85,000 PSI
Min Elongation: 15%
Min Hardness: 80 Rockwell "B"
Honed ID, 8-16 µin Ra
Straightness: .015" per 3'
Ends capped, metal banded in hex bundles

STOCKING SIZES: LENGTHS

1.875 x 1.500/1.497: 10/12'

1.875 x 1.503/1.500: 10/12'

2.375 x 2.000/1.997: 16/19'

2.375 x 2.003/2.000: 16/19'

2.875 x 2.500/2.497: 16/19'

2.875 x 2.503/2.500: 16/19'

3.000 x 2.500/2.497: 16/19'

3.000 x 2.503/2.500: 16/19'

3.375 x 3.000/2.997: 20/24'

3.375 x 3.003/3.000: 20/24'

3.500 x 3.000/2.997: 20/24'

3.500 x 3.003/3.000: 20/24'

4.000 x 3.500/3.497: 20/24'

4.000 x 3.503/3.500: 20/24'

4.500 x 4.000/3.997: 20/24'

4.500 x 4.003/4.000: 20/24'

5.000 x 4.500/4.497: 20/24'

5.000 x 4.503/4.500: 20/24'

5.125 x 4.500/4.497: 20/24'

5.250 x 4.500/4.497: 20/24'

5.250 x 4.503/4.500: 20/24'

5.500 x 5.000/4.997: 20/24'

5.500 x 5.003/5.000: 20/24'

5.625 x 5.000/4.997: 20/24'

5.625 x 5.003/5.000: 20/24'

5.750 x 5.000/4.997: 20/24'

5.750 x 5.003/5.000: 20/24'

6.000 x 5.500/5.497: 20/24'

6.000 x 5.503/5.500: 20/24'

6.250 x 5.500/5.497: 20/24'

6.250 x 5.503/5.500: 20/24'

Skived and Roller Burnishing (SRB)

The SRB process is a single pass operation that uses a cutting tool on the forward stroke, to machine to size, and uses roller bearings on the reverse stroke, to burnish the surface. Skiving and roller burnishing is faster than honing and typically yields tighter tolerances and surface finish control than honing.

Bore Range – 1.969-9.843” (50-250 mm)
Max Length – 29.5’ (9 meters)
Surface Finish – 8 µin Ra max
Dimensional tolerance ISO – H8

Product Name: Honed and Skived & Roller Burnished Tubing

Tube Specifications

ASTM A513-5 & A519 EN GB/T3639: DIN
JIS
and other international standards

Diameter (ID): 1.000” to 9.843”

Wall Thickness: .1875” to 1.250”

Steel Grades & Alloys

ST52.3 1026 E355 Q345B: Q345D
25 Mn
and many others

Heat Treatments

Stress Relieving Normalizing: Full anneal
Quench & Tempering

Value Added Services

Precision Cutting to Length Tolerances as close as +/-.004” (Depending on Size): Chamfering
Custom Made Shapes

Chrome Plated Bar

The complementary product to the cylinder barrel is the piston rod. Salem offers Chrome plated bar for this application. Our bar stock is available in TGP, Chrome Plated, and induction hardened conditions. Induction Hardened Chrome plated bar is available in sizes from 0.629-11.811”. 50 RC minimum hardness at 0.050” depth (shallow case = .030” and heavy case = .070” available). Our mills start the process by peeling a raw carbon or alloy bar, straightening and then hardening the material. Then the bars are cut, ground, and straightened until they are ready to be polished. After the preliminary polishing the bars are chrome plated and then polished to a final surface finish of 8 µin Ra or as required. In addition to chrome plated bar, chrome plated OD tubing (hollow rod) is also available.

Our suppliers conduct a Neutral Salt Spray test per ASTM B117 to check that the Rating is a 7-10 @ 120 hours.

Bar Diameter: .236- 11.811” (6-300 mm)

Max Length: 23’ (7 meters)

Surface Finish: 8 µin Ra max

Diameter Tolerances: ISO F7

Roundness Tolerances: Half standard ISO F7

Chrome Thickness: .0008-.0012” (20-30 µm)

Chrome Hardness: 850-1150 HV (Approx. 65-70 Rc)

Specifications: ASTM B117 as well as other standards

Grades

1045V 4140: micro-alloy
Proprietary grades HY4700 & HY4520