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For Pneumatic Cylinder

Remark:

Internal Diameter Accuracy : H7, H8, H9
Internal Roughness : Ra 0.2μ m ~ Ra 0.8μ m
Standard Length : 3M~11M
Special Length : 12M
Internal Diameter : 18 mm ~ 300 mm
Material : JIS STKM13C, DIN ST52, SAE1020 or Mechanical Construction Use Carbon Steel Pipes, Other Specifications Can be made Customer Request based on.

Chemical Analysis & Mechanical Properties

Spec

Kind

Mark

Manufacture

Chemical Composition %

C

Si

Mn

P

S

 

13

A

STKM 13A

S
E

0.25 >

0.35 >

0.30
-
0.90

0.040
Under

0.040
Under

B

STKM 13B

C

STKM 13C


Induction

Tensile Test

Bend Test Flattening Test

Tensile
(Kgf/mm²)

Yield
(Kgf/mm²)

ELOVG(%)

Bend
Angle

Inside
Radius

Outside
Radius

Test Piece
11th 12 th
L

5 th
Test Piece
V

 

38

220

30

25

90

6D

2/3D

45

310

20

15

90

6D

3/4D

52

390

15

10

Formula of Pipe Wall Thickness Pressure Resistant Gauge

t = P. D. / 200 S
t = Wall Thickness (mm)
P = The Largest Pressure (Kg/mm²)
D = Steel Pipe Inside Diameter (mm)
S = σ / 5 Kg / mm²
σ = The Lowest Numerical Value of Elongation (Kg/mm²)

Product Standard Form

I.DxO.D.
rr.mØ
Apply Pressure
Kg/cm²
I.DxO.D.
rr.mØ
Apply Pressure
Kg/cm²
I.DxO.D.
rr.mØ
Apply Pressure
Kg/cm²
I.DxO.D.
rr.mØ
Apply Pressure
Kg/cm²
18x31
751
63x73
165
100x116
166
150x168
125
18x35
980
63x76
215
100x120
208
150x170
140
20x30
520
63x80
280
100x125
260
150x175
173
20x40
1040
65x75
160
100x130
312
150x180
210
25x35
416
65x80
240
   
152.4x171.5
130
30x36
208
65x85
320
101.6x117.48
160
152.4x177.8
170
30x40
346
70x80
148
105x120
150
160x172
78
30x45
550
70x82
178
105x125
200
160x178
117
30x42
325
70x85
238
107.95x125
170
 
 
 
 
70x90
297
110x120
95
160x180
135
35x45
297
   
110x125
142
160x185
162
38x50
330
75x85
138
110x130
189
160x190
195
38.1x50.8
335
75x90
208
110x135
240
165x190
160
40x44
104
75x95
270
114.3x133.35
180
165.1x190.5
160
40x46
156
76.2x88.9
170
   
170x190
125
40x48
208
76.2x92.07
220
115x130
140
170x195
150
40x50
260
80x87
90
115x135
185
170x205
220
40x55
390
80x89
117
120x132
104
175x190
95
40x60
520
80x90
130
120x135
130
175x195
120
   
80x95
195
120x140
173
177.8x203.2
150
45x55
231
80x100
260
125x135
75
177.8x215.9
220
45x60
346
82.55x92.07
130
125x137
100
180x196
92
50x55
104
82.55x95
160
125x140
125
180x205
150
50x57
145
   
125x145
166
180x210
175
50x58
166
82.55x98.4
200
125x152
224
180x216
208
50x60
208
85x95
122
   
180x225
260
50x65
312
85x100
190
127x146
155
200x216
83
50x70
416
88.9x101.6
150
130x142
96
200x220
100
50.8x63.5
260
88.9x105
190
130x150
160
200x232
166
55x65
189
90x100
115
130x153
190
200x242
210
   
90x105
173
130x155
200
203.2x228.5
130
55x70
283
90x110
231
135x160
200
203.2x214.3
195
57x70
240
95x110
165
140x153
96
220x260
190
60x70
173
95x115
220
140x155
115
225x254
135
60x72
208
   
140x160
148
250x267
71
60x75
260
98.4x111.13
140
140x165
185
250x290
170
60x80
346
100x107
73
140x170
225
   
63.5x76.2
210
100x109
94
145x170
180
250x298
200
63x69
99
100x110
104
145x175
220
300x318
62
63x71
132
100x114
146
150x160
70
300x355
195
   
100x115
156
150x163
90