SKK rod tubes are available in short length to long length, and used for the manufactures of rollers, rod tubes for construction machines etc.

1.Injurious flaws of mother tubes are removed prior to cold drawing process.So that shortening the time of grinding process contributes to the cost saving.

2.Lengthy tubes are available.

3.Decrease the material loss due to less grinding substances.

4.Heavy adjustment is possible by cold drawing process and material costs become lower as you need not to use high tensile steels.

5.Seamless or electric resistance welded tubes are available.

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 (mm)

Inside diameter

Tolerance for 

inside

 diameter

 Wall thickness

Tolerance for

 wall thickness 

length

 〜50

+0.20 

+0.50 

 〜10

 ±10%

 〜6,000

 51〜80

+0.20 

+0.60 

 〜10

 〜8,000

 81〜120

+0.30 

+0.80 

 〜15

 〜10,000

 121〜160

+0.40 

+1.00 

 〜20

 〜10,000

 161〜200

+0.60 

+1.00 

 〜20

 〜10,000

 201〜260

+0.80 

+1.00 

 〜20

 〜10,000
お電話でのお問合せ・ご相談はこちら
072-233-7461

お気軽に
お問合せください

お電話でのお問合せ・相談予約

072-233-7461

フォームは24時間受付中です。お気軽にご連絡ください。

昭和鋼管株式会社

住所

〒590-0982
大阪府堺市堺区海山町
3丁158番地