Cylinder tube,ready to hone and burnish type

SKK ready to hone and burnish type cylinder tubes enjoy good reputation among many customers.

Please consider to use the tubes to our own specifications as well as carbon steel tubes to JIS G3473 for cylinder barrels.

The notable features of this cylinder tube,ready to hone and burnish type

1.Tubes have uniform and stable mechanical properties.

2.Dimensional precision is excellent.We have paid special attention to inside diameter,roughness,and straightness.

3.The tubes having less strains can be obtained through the processes such as horning,burnishing,grinding,welding,drilling,and etc.,since the tubes are stress relieved after cold drawing process.

4.Shortening the time for processings contributes to the cost saving.

 

Specifications of horning ,burnishing type cylinder steel tube

1.Chemical composition

 Grade C Si Mn P S
 JIS STKM13C 0.25max 0.35max 0.30〜0.90 0.040max 0.040max

 SKK

original

standards

SKCY510 0.25max 0.35max 0.30〜0.90 0.040max 0.040max
SKCY540 0.17〜0.25 0.35max 0.30〜0.90 0.040max 0.040max
SKCY590 0.17〜0.25 0.35max 0.60〜0.90 0.040max 0.040max
SKCY690 0.17〜0.22 0.80max 1.65max 0.035max 0.035max

 

2.Mechanical properties

Grade 

Tensile strength

(N/mm2)

Yield point

(N/mm2)

Elongation

(%)

JIS 

STKM13C

510min

380min

15min

SKK

original

standards

SKCY510

510min

380min

15min

SKCY540

540min

430min

15min

SKCY590

590min

490min

15min

SKCY690

690min

590min

15min

 

3.Tolerances for dimensions

Inside diameter

Tolerance for 

inside

 diameter

Tolerance for

inside diameter

of burnishing

 Wall thickness

Tolerance for

 wall thickness 

 〜40

−0.05

−0.15 

−0.20

−0.40

 〜7.5

 ±10%

 41〜60

−0.10

−0.20 

−0.20

−0.40 

 〜10.0

 61〜80

−0.15

−0.25

−0.20

−0.40

 〜12.5

 81〜100

−0.20

−0.35 

−0.30

−0.40 

 〜15.0

 101〜130

−0.20

−0.35

−0.40

−0.60

 〜15.0

 131〜160

−0.30

−0.50 

−0.60

−0.80

 〜18.0

 161〜200

−0.35

−0.60

−0.60

−0.90

 〜20.0

 201〜230

−0.60

−0.90

−0.60

−0.90

 〜20.0

About JIS G3473   click here JISG3473.pdf