Precision Cold Drawn Steel Tubes for Hydraulic Cylinder

Precision Cold Drawn Steel Tubes

for Hydraulic Cylinder

Grade

Tensile

Strength

(MPa)

Yield

Strength

(MPa)

Elong

-ation

(%)

Hard-

ness

(HRB)

Impact Value (KV at -20℃ in J)

Min. average

absorbed energy

Min. single

absorbed energy

L T L T

STKM13C 510 380 15 85 - - - -

SAE1020/22 520 470 15 85 - - - -

SAE1026 600 500 15 85 - - - -

SAE1524 620~720 550~650 15 85~100 27 - 18.9 -

E355+C 620 520 7 - - - - -

E355+SR 590 520 15 85 27 - 18.9 -

▶ Mechanical Properties

I. DOM Tubes - General Specification

1) Charpy V-notch specimen size : 10x10mm. Sub-size can be tested. (10x7.5, 10x5, 10x2.5mm)

2) Upon request grades E355 can be supplied with impact toughness guaranteed at -40°C.

(wt%, max.) ▶ Material Grade

2

Tubular Products of ILJIN’s DOM (Drawn Over Mandrel) Tubing is manufactured to ASTM A513, EN 10305-2,

JIS G3445 E-C Specifications. DOM Tubing has superior concentricity and a high degree of uniformity in wall

thickness. This is not necessarily true of seamless tubing, because starting shell dimensions are not as

consistent as ERW tubing. Greater strength may also be obtained by the use of HSLA material.

▶ Material Comparison Table

ILJIN Criteria EN 10305-2 DIN 2393 JIS G 3445 AISI/SAE API 5CT

JIS G 3445 STKM13C - - STKM 13C 1026 (Eqv.) -

SAE 1020 - - STKM 13C (Eqv.) 1020 -

SAE 1022 - - STKM 13C 1022 -

SAE 1026 - - STKM 13C (Eqv.) 1026 -

SAE 1524 E355 (Eqv.) ST52.3 (Eqv.) STKM 19C (Eqv.) 1524 J55 (Eqv.)

EN 10305-2 E355 E355 ST52.3 STKM 19C (Eqv.) 1518 (Eqv.) J55 (Eqv.)

Grade C Si Mn P S Al Nb V

STKM13C 0.25 0.35 0.30~0.90 0.040 0.040

SAE 1020 0.18~0.23 - 0.30~0.60 0.035 0.035

SAE 1022 0.18~0.23 - 0.70~1.00 0.035 0.035

SAE 1026 0.22~0.28 - 0.60~0.90 0.035 0.035

SAE 1524 0.16~0.26 0.55 1.20~1.50 0.025 0.025 0.02 min. - -

E355 (St52.3) 0.22 0.55 1.60 0.025 0.025 0.02 min. - -

I. DOM Tubes - Application

■ Ready to Use (SSID)

▶ I.D Tolerance

Technical Characteristics

OD Tolerance

<40 ±0.2mm

40~100 ±0.3mm

>100 ±0.5mm

Surface Smooth as drawn according to EN10305-2

ID Tolerance H9

Roughness Ra 0.8㎛ Max.

WT Tolerance ±5% of Wall Thickness

Straightness 0.8mm/m

Steel Grade ASTM A513 TYPE 5 1020/1022, EN10305-2 E355+C

▶ Size Range

INS

IDE

DIA

ME

TE

R (≤

)

WALL THICKNESS

mm 3 4 5 6 7 8 9 10

inch 0.118 0.157 0.197 0.236 0.276 0.315 0.354 0.394

30 1.181

40 1.575

50 1.969

65 2.559

80 3.150

100 3.937

120 4.724

-0/+0.052

-0/+0.062

-0/+0.074

-0/+0.087

ISO Tolerances for Holes (ISO 286-2)

Nominal Hole Sizes (mm)

Over 3 6 10 18 30 40 50 65 80 100 120 140 160

Inc 6 10 18 30 40 50 65 80 100 120 140 160 180

Micrometers

H9 30 36 43 52 62 74 87 100

0 0 0 0 0 0 0 0

▶ Technical Characteristics

3

Hydraulic Cylinder Tube with special smooth inside diameter (SSID) is ready to use and is oiled with the inside

and outside of the tubes. Tolerances on inside diameter is ISO H9 and roughness is Ra 0.8㎛ Max.

ID finish and tolerance are similar to that obtained in a conventional honing process thus avoiding or minimizing

the costly honing process normally followed for such application.

INS

IDE

DIA

ME

TE

R

WALL THICKNESS

mm 5 6 7.5 10 12.5 15 17.5 20 22.5 25

inch 0.197 0.236 0.295 0.394 0.492 0.591 0.689 0.787 0.886 0.984

40 1.575

50 1.969

60 2.362

70 2.756

80 3.150

90 3.543

100 3.937

110 4.331

120 4.724

130 5.118

140 5.512

150 5.906

160 6.299

170 6.693

180 7.087

190 7.480

200 7.874

210 8.268

220 8.661

230 9.055

240 9.449

250 9.843

260 10.236


OD Tolerance According to ASTM A513 Type5

ID Tolerance According to table(Next page.)



Steel Grade ASTM A513 TYPE 5 1020/1022, EN10305-2 E355+C


■ Ready to Hone or SRB

▶ Size Range


4

Ready to honed or SRB (Skiving and Roller Burnishing) tube is widely used in hydraulic cylinder industries. i.e.

textile machines, engineering machines, construction vehicles, etc.

Finished OD

Inch(mm)

Finished Wall Thickness*, Inches (Millimeters) Greater

than

.625

(15.88)

.125&Under

(3.18)

.126-.188

(3.20)-

(4.78)

.189-.250

(4.80)-

(6.35)

.251-.375

(6.37)-

(9.53)

.376-.500

(9.55)-

(12.70)

.501-.625

(12.73)-

(15.88)

Up to-3.000

(76.20)

0.006

(0.15)

0.007

(0.18)

0.008

(0.20)

0.009

(0.23)

0.010

(0.25)

-

-

-

-

3.001-4.000

(76.21)-(101.60)

0.007

(0.18)

0.008

(0.20)

0.009

(0.23)

0.010

(0.25)

0.011

(0.28)

0.012

(0.30)

0.014

(0.36)

4.001-6.000

(101.61)-(152.40)

0.008

(0.20)

0.009

(0.23)

0.010

(0.25)

0.011

(0.28)

0.012

(0.30)

0.013

(0.33)

0.015

(0.38)

6.001-8.000

(152.41)-(203.20)

0.008

(0.20)

0.009

(0.23)

0.010

(0.25)

0.011

(0.28)

0.013

(0.33)

0.014

(0.36)

0.016

(0.41)

8.001-10.500

(203.21)-(266.70)

-

-

-

-

0.011

(0.28)

0.012

(0.30)

0.013

(0.33)

0.015

(0.38)

0.017

(0.43)

10.501-12.000

(266.71)-(304.80)

-

-

-

-

-

-

0.013

(0.33)

0.014

(0.36)

0.015

(0.38)

0.018

(0.46)


■ Machining Qualities

▶ Honing Allowances for DOM Tubing

Minimum Inside Diameter Stock Allowance for the Removal of Inside Surface Imperfections

by Honing Operations

5

Notes.

- If a specific size is desired, these allowances plus normal size tolerance must be considered in

calculating the size to be ordered.

- *Where the ellipsis(...) appears in this table, no allowances have been established

Example.

4.500”(114.30)OD tube which will clean-up by honing to 4.000/4.004”(101.60/101.70) ID

(1)Nominal wall Thickness = 4.500”(114.30)OD – 4.000”(101.60)ID = .500”(12.70)÷2 = .250”(6.35)

Minimum clean-up allowance for removal of ID surface imperfections is .010”(0.25)

(2)Minimum honed ID 4.000”(101.60) – Less allowance .010”(0.25) = 3.990”(101.34)

(3)Order size:

- 4.500”(114.30) + .013”(0.33) – .000”(0.00)OD x

3.990”(101.34) + .000”(0.00) – .013”(0.33)ID x

0.255”(6.48) reference wall

Finished OD

Inch(mm)

Finished Wall Thickness*, Inches (Millimeters) Greater

than

.625

(15.88)

.125&Under

(3.18)

.126-.188

(3.20)-

(4.78)

.189-.250

(4.80)-

(6.35)

.251-.375

(6.37)-

(9.53)

.376-.500

(9.55)-

(12.70)

.501-.625

(12.73)-

(15.88)

Up to-3.000

(76.20)

0.012

(0.30)

0.014

(0.36)

0.016

(0.41)

0.018

(0.46)

0.020

(0.51)

-

-

-

-

3.001-4.000

(76.21)-(101.60)

0.013

(0.33)

0.015

(0.38)

0.017

(0.43)

0.019

(0.48)

0.021

(0.53)

0.024

(0.61)

0.026

(0.66)

4.001-6.000

(101.61)-(152.40)

0.014

(0.36)

0.016

(0.41)

0.018

(0.46)

0.020

(0.51)

0.022

(0.56)

0.025

(0.64)

0.027

(0.69)

6.001-8.000

(152.41)-(203.20)

0.016

(0.41)

0.018

(0.46)

0.020

(0.51)

0.022

(0.56)

0.024

(0.61)

0.026

(0.66)

0.028

(0.71)

8.001-10.500

(203.21)-(266.70)

-

-

-

-

0.021

(0.53)

0.023

(0.58)

0.025

(0.64)

0.027

(0.69)

0.029

(0.74)

10.501-12.000

(266.71)-(304.80)

-

-

-

-

-

-

0.024

(0.61)

0.026

(0.66)

0.028

(0.71)

0.030

(0.76)


■ Machining Qualities

▶ Skiving Allowances for DOM Tubing

Minimum Inside Diameter Stock Allowance for the Removal of Inside Surface Imperfections

by Skiving Operations

6

Notes.

- If a specific size is desired, these allowances plus normal size tolerance must be considered in

calculating the size to be ordered.

- *Where the ellipsis(...) appears in this table, no allowances have been established**

Example.

4.500”(114.30)OD tube which will clean-up by skiving to 4.000/4.004”(101.60/101.70) ID

(1)Nominal wall Thickness = 4.500”(114.30)OD – 4.000”(101.60)ID = .500”(12.70)÷2 = .250”(6.35)

Minimum clean-up allowance for removal of ID surface imperfections is .018”(0.46)

(2)Minimum skived ID 4.000”(101.60) – Less allowance .018”(0.46) = 3.982”(101.14)

(3)Order size:

- 4.500”(114.30) + .013”(0.33) – .000”(0.00)OD x

3.982”(101.14) + .000”(0.00) – .013”(0.33)ID x

0.259”(6.58) reference wall


OD Tolerance -0 / +0.5mm

Roughness Ra 6.3㎛ , Rt 63㎛ Max.

ID Tolerance according to table.

Roughness Ra 1.6㎛ , Rt 16㎛ Max.



Concentricity < 2% of wall thickness

Steel Grade DIN 2393 St52.3+SR


■ Telescopic Cylinder Tubes


7

Telescopic cylinders are a special design of a hydraulic cylinder or pneumatic cylinder which provide an

exceptionally long output travel from a very compact retracted length. Typically the collapsed length of a

telescopic cylinder is 20 to 40% of the fully extended length depending on the number of stages. Some

pneumatic telescoping units are manufactured with retracted lengths of under 15% of overall extended unit

length. This feature is very attractive to machine design engineers when a conventional single stage rod style

actuator will not fit in an application to produce the required output stroke.

INS

IDE

DIA

ME

TE

R

WALL THICKNESS

mm 5 6 7.5 8 8.5 9 9.5 10

inch 0.197 0.236 0.295 0.315 0.335 0.354 0.374 0.394

70 2.756

80 3.150

90 3.543

100 3.937

110 4.331

120 4.724

130 5.118

140 5.512

150 5.906

160 6.299

170 6.693

185 7.283

200 7.874

220 8.661

240 9.449

260 10.236

▶ Size Range

+0.05/+0.25

+0.05/+0.30

+0.05/+0.30

+0.05/+0.35

■ Chrome Plating Rod tube


OD Tolerance -0 / +0.5

ID Tolerance according to EN10305-2

Surface defects max. 0.20mm


Eccentricity max. 5% from the value of the WT

Steel Grade EN10305-2 E355+SR

Oil Rig

8

A cylinder rod is typically a hard chrome-plated piece of cold-finished steel which operates both inside and

outside the cylinder barrel. This means that it must also operate within and outside of the hydraulic fluid. The

cylinder rod attaches to the piston and extends from the cylinder through the rod-end head, and connects the

working component within the machine to its hydraulic actuator.


Dump Truck


■ Telescopic Cylinder Tubes

Grade C Si Mn P S Al Nb V

STKM13C 0.25 0.35 0.30~0.90 0.040 0.040 - - -

SAE 1022 0.16~0.25 0.10~0.35 0.30~0.90 0.040 0.015 0.01~0.05 - -

SAE 1026 0.22~0.28 - 0.60~0.90 0.040 0.050 - - -

E355 0.15~0.22 0.55 1.20~1.60 0.015 0.015~0.035 0.02~0.06 - -

E355M 0.15~0.22 0.55 1.20~1.60 0.015 0.015~0.035 0.02~0.06 0.015~0.025 -

E470 0.16~0.22 0.10~0.50 1.30~1.70 0.015 0.015~0.035 0.01 min. 0.07 0.08~0.15

1) Charpy V-notch specimen size : 10x10mm. Sub-size can be tested. (10x7.5, 10x5, 10x2.5mm)

2) Upon request grades E355M and E470 can be supplied with impact toughness guaranteed at -40°C.

Grade

Tensile

Strength

(MPa)

Yield

Strength

(MPa)

Elong-

ation

(%)

Hard-

ness

(HRB)

Impact Value (KV at -20℃ in J)

Min. average

absorbed energy

Min. single

absorbed energy

L T L T

STKM13C 510 380 15 85 - - - -

SAE1022 540~680 490~620 15 83~96 - - - -

SAE1026 600 500 15 85 - - - -

E355 620 520 15 - - - - -

E355M 620 520 15 - 27 - 18.9 -

E470 650 525 14 - 40 27 28 18.9

II. CDS Tubes - General Specification

▶ Mechanical Properties

(wt%, max.) ▶ Material Grade

9

Cold Drawn Seamless tubing (also known as CDS) is most often used in hydraulics, CDS is used to make

hollowed cylinder barrels and rods. Seamless heavy walled tubes are also popular for large bore, heavy walled,

high pressure hydraulic cylinders.

Chemical composition and manufacturing process have been optimized in order to comply with the most

severe conditions of hydraulic cylinder applications.

- Fatigue life

- Working pressure

- Low temperature toughness

Ready to SRB (Skiving and Roller Burnishing) tube is widely used in hydraulic cylinder industries. i.e. textile

machines, engineering machines, construction vehicles, etc.

▶ Material Comparison Table

ILJIN Criteria EN DIN JIS G 3445 AISI/SAE

JIS G 3445 STKM13C - - STKM 13C 1026 (Eqv.)

SAE 1022 - - STKM 13C 1022

SAE 1026 - - STKM 13C (Eqv.) 1026

EN 10305-2 E355 10305-2 E355 2393 ST52 STKM 19C (Eqv.) 1518 (Eqv.)

EN 10305-2 E355M 10305-2 E355 2393 ST52 STKM 19C (Eqv.) 1518 (Eqv.)

EN 10297-1 E470 10297-1 E470 20MnV6

INS

IDE

DIA

ME

TE

R

WALL THICKNESS

mm 5 6 7.5 10 12.5 15 17.5 20 22.5 25

inch 0.197 0.236 0.295 0.394 0.492 0.591 0.689 0.787 0.886 0.984

40 1.575

50 1.969

60 2.362

70 2.756

80 3.150

90 3.543

100 3.937

110 4.331

120 4.724

130 5.118

140 5.512

150 5.906

160 6.299

170 6.693

180 7.087

190 7.480

200 7.874

210 8.268

220 8.661

230 9.055

240 9.449

250 9.843

260 10.236

-0.40/-0.70

-0.50/-0.90

-0.50/-1.00

-0.70/-1.40

-0.80/-1.40

-0.60/-1.40


OD Tolerance according EN10305-1 standard

ID Tolerance according to table.

Surface defects max. 0.30mm


Eccentricity

(WTmax-WTmin)/(WTmax+WTmin)

WT<15 8% of Wall Thickness

WT≥15 10% of Wall Thickness

II. CDS Tubes - General Specification

▶ Size & Tolerance

10


Nominal dimensions are understood to mean the dimensions of the finished cylinder barrel after SRB. Tubes

are produced within tolerances with eccentricity. OD and ID ovality are also within the tolerances.

II. CDS Tubes - Applications

Excavator

Fork Lift Motor Grader Payloader Bulldozer

Ship Building (Swing Arm Crane)

11

▶ Chrome Plating Rod tubes

▶ Hydraulic Cylinder tubes

▶ ILJIN products delivery condition

Jeonju Head Office / Plant 1746, Hoguk-ro, Imsil-gun, Jeollabuk-do, Korea

Seoul Office 04167 ILJIN B/D 3F. 45, Mapo-daero, Mapo-gu, Seoul, Korea

ILJIN Steel America 11757 KATY FREEWAY STE 130, HOUSTON, TX 77079

Busan Sales Office #1103, Byucksan Digital Valley, 303, Daedong-ro, Busan, Korea E-Mail : [email protected] Homepage : www.iljinsteel.com

ILJIN Steel Corporation

Documents

Precision Cold Drawn Steel Tubes for Hydraulic Cylinder