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JIS G3441
This Japanese Industrial Standard specifies the alloy steel tubes, hereinfter referred to as the"tubes", used for machinery, automobiles and other machine parts.
Application:Pipe ordered under this specification for machinery, automobiles and other machine parts.
Manufacturing Process:By a seamless process: hot finished and cold finished (with annealed)
Manufacture:seamless pipe (hot finished and cold finished)
Size: O.D.: 15.0～114mm W.T.: 2～20mm
Grade: Class1, Class2, Class3
Length: 6M or specified length as required.
Ends: Plain End, Beveled End.
Tolerance of OD and W.T
|
Division |
Tolerance on O.D |
Tolerance on W.T |
||
|
Class 1 |
D＜50m |
±0.5 mm |
S＜4mm |
+0.6mm-0.5mm |
|
50mm≤D |
±1% |
S≥4mm |
+1% -12.5% |
|
|
Class 2 |
D＜50m |
±0.25mm |
S＜3mm |
±0.3mm |
|
50mm≤D |
±0.5% |
S≥3mm |
±10% |
|
|
Class 3 |
D＜25m |
±0.12mm |
S＜2mm |
±0.15mm |
|
40mm＞D≥25mm |
±0.15mm |
|
|
|
|
50mm＞D≥40mm |
±0.18mm |
S≥2mm |
±8% |
|
|
60mm＞D≥50mm |
±0.20mm |
Notes: tolerance on each wall thickness shall be rounded off to one decimal place in accordance with rule a JIS Z 8401 |
||
|
70mm＞D≥60mm |
±0.23mm |
|||
|
80mm＞D≥70mm |
±0.25mm |
|||
|
90mm＞D≥80mm |
±0.30mm |
|||
|
100mm＞D≥90mm |
±0.40mm |
|||
|
D≥100mm |
±0.50% |
|||
|
|
|
|
|
|
|
1. The OD tolerance of hot finish seamless steel pipe according to Class1 2. Quenched and tempered steel pipes according to 4 categories. |
||||
Grade and Chemical Composition (％)
|
Designation of grade |
C |
Si |
Mn |
P |
s |
Ni |
Cr |
Mo |
Cu |
|
SMn420TK |
0.17 to 0.23 |
0.15 to 0.35 |
1.20 to 1.50 |
0.030 max. |
0.030 max. |
0.25 max. |
0.35 max. |
/ |
0.30 max. |
|
SMn433TK |
0.30 to 0.36 |
0.15 to 0.35 |
1.20 to 1.50 |
0.030 max. |
0.030 max. |
0.25 max. |
0.35 max. |
/ |
0.30 max. |
|
SMn438TK |
0.35 to 0.41 |
0.15 to 0.35 |
1.35 to 1.65 |
0.030 max. |
0.030 max. |
0.25 max. |
0.35 max. |
/ |
0.30 max. |
|
SMn443TK |
0.40 to 0.46 |
0.15 to 0.35 |
1.35 to 1.65 |
0.030 max. |
0.030 max. |
0.25 max. |
0.35 max. |
/ |
0.30 max. |
|
SMnC420TK |
0.17 to 0.23 |
0.15 to 0.35 |
1.20 to 1.50 |
0.030 max. |
0.030 max. |
0.25 max. |
0.35 to 0.70 |
/ |
0.30 max. |
|
SMnC443TK |
0.40 to 0.46 |
0.15 to 0.35 |
1.35 to 1.65 |
0.030 max. |
0.030 max. |
0.25 max. |
0.35 to 0.70 |
/ |
0.30 max. |
|
SCM15TK |
0.13 to 0.18 |
0.15 to 0.35 |
0.60 to 0.90 |
0.030 max. |
0.030 max. |
0.25 max. |
0.90 to 1.20 |
/ |
0.30 max. |
|
SCM20TK |
0.18 to 0.23 |
0.15 to 0.35 |
0.60 to 0.90 |
0.030 max. |
0.030 max. |
0.25 max. |
0.90 to 1.20 |
/ |
0.30 max. |
|
SCr430TK |
0.28 to 0.33 |
0.15 to 0.35 |
0.60 to 0.90 |
0.030 max. |
0.030 max. |
0.25 max. |
0.90 to 1.20 |
/ |
0.30 max. |
|
SCr435TK |
0.33 to 0.38 |
0.15 to 0.35 |
0.60 to 0.90 |
0.030 max. |
0.030 max. |
0.25 max. |
0.90 to 1.20 |
/ |
0.30 max. |
|
SCM40TK |
0.38 to 0.43 |
0.15 to 0.35 |
0.60 to 0.90 |
0.030 max. |
0.030 max. |
0.25 max. |
0.90 to 1.20 |
/ |
0.30 max. |
|
SCM45TK |
0.43 to 0.48 |
0.15 to 0.35 |
0.60 to 0.90 |
0.030 max. |
0.030 max. |
0.25 max. |
0.90 to 1.20 |
/ |
0.30 max. |
|
SCM415TK |
0.13 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.18 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.25 |
max. |
|
SCM418TK |
0.16 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.21 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.25 |
max. |
|
SCM420TK |
0.18 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.23 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.25 |
max. |
|
SCM421TK |
0.17 to |
0.15 to |
0.70 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.23 |
0.35 |
1.00 |
max. |
max. |
max. |
1.20 |
0.25 |
max. |
|
SCM425TK |
0.23 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.28 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.30 |
max. |
|
SCM430TK |
0.28 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.33 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.30 |
max. |
|
SCM432TK |
0.27 to |
0.15 to |
0.30 to |
0.030 |
0.030 |
0.25 |
1.00 to |
0.15 to |
0.30 |
|
|
0.37 |
0.35 |
0.60 |
max. |
max. |
max. |
1.50 |
0.30 |
max. |
|
SCM435TK |
0.33 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.38 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.30 |
max. |
|
SCM440TK |
0.38 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.43 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.30 |
max. |
|
SCM445TK |
0.43 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.15 to |
0.30 |
|
|
0.48 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.35 |
max. |
|
SCM822TK |
0.20 to |
0.15 to |
0.60 to |
0.030 |
0.030 |
0.25 |
0.90 to |
0.35 to |
0.30 |
|
|
0.25 |
0.35 |
0.90 |
max. |
max. |
max. |
1.20 |
0.45 |
max. |
|
SNC236TK |
0.32 to 0.40 |
0.15 to 0.35 |
0.50 to 0.80 |
0.030 max. |
0.030 max. |
1.00 to 1.50 |
0.50 to 0.90 |
/ |
0.30 max. |
|
SNC415TK |
0.12 to 0.18 |
0.15 to 0.35 |
0.35 to 0.65 |
0.030 max. |
0.030 max. |
2.00 to 2.50 |
0.20 to 0.50 |
/ |
0.30 max. |
|
SNC631TK |
0.27 to |
0.15 to |
0.35 to |
0.030 max. |
0.030 max. |
2.50 to |
0.60 to |
/ |
0.30 max. |
|
0.35 |
0.35 |
0.65 |
3 |
1 |
|||||
|
SNC815TK |
0.12 to |
0.15 to |
0.35 to |
0.030 max. |
0.030 max. |
3.00 to |
0.60 to |
/ |
0.30 max. |
|
0.18 |
0.35 |
0.65 |
3.5 |
1 |
|||||
|
SNC836TK |
0.32 to |
0.15 to |
0.35 to |
0.030 max. |
0.030 max. |
3.00 to |
0.60 to |
/ |
0.30 max. |
|
0.4 |
0.35 |
0.65 |
3.5 |
1 |
|||||
|
SNCM220TK |
0.17 to |
0.15 to |
0.60 to |
0.030 max. |
0.030 max. |
0.40 to |
0.40 to |
0.15 to |
0.30 max. |
|
0.23 |
0.35 |
0.9 |
0.7 |
0.6 |
0.25 |
||||
|
SNCM240TK |
0.38 to |
0.15 to |
0.70 to |
0.030 max. |
0.030 max. |
0.40 to |
0.40 to |
0.15 to |
0.30 max. |
|
0.43 |
0.35 |
1 |
0.7 |
0.6 |
0.3 |
||||
|
SNCM415TK |
0.12 to |
0.15 to |
0.40 to |
0.030 max. |
0.030 max. |
1.60 to |
0.40 to |
0.15 to |
0.30 max. |
|
0.18 |
0.35 |
0.7 |
2 |
0.6 |
0.3 |
||||
|
SNCM420TK |
0.17 to |
0.15 to |
0.40 to |
0.030 max. |
0.030 max. |
1.60 to |
0.40 to |
0.15 to |
0.30 max. |
|
0.23 |
0.35 |
0.7 |
2 |
0.6 |
0.3 |
||||
|
SNCM431TK |
0.27 to |
0.15 to |
0.60 to |
0.030 max. |
0.030 max. |
1.60 to |
0.60 to |
0.15 to |
0.30 max. |
|
0.35 |
0.35 |
0.9 |
2 |
1 |
0.3 |
||||
|
SNCM439TK |
0.36 to |
0.15 to |
0.60 to |
0.030 max. |
0.030 max. |
1.60 to |
0.60 to |
0.15 to |
0.30 max. |
|
0.43 |
0.35 |
0.9 |
2 |
1 |
0.3 |
||||
|
SNCM447TK |
0.44 to |
0.15 to |
0.60 to |
0.030 max. |
0.030 max. |
1.60 to |
0.60 to |
0.15 to |
0.30 max. |
|
0.5 |
0.35 |
0.9 |
2 |
1 |
0.3 |
||||
|
SNCM616TK |
0.13 to |
0.15 to |
0.80 to |
0.030 max. |
0.030 max. |
2.80 to |
1.40 to |
0.40 to |
0.30 max. |
|
0.2 |
0.35 |
1.2 |
3.2 |
1.8 |
0.6 |
||||
|
SNCM625TK |
0.20 to |
0.15 to |
0.35 to |
0.030 max. |
0.030 max. |
3.00 to |
1.00 to |
0.15 to |
0.30 max. |
|
0.3 |
0.35 |
0.6 |
3.5 |
1.5 |
0.3 |
||||
|
SNCM630TK |
0.25 to |
0.15 to |
0.35 to |
0.030 max. |
0.030 max. |
2.50 to |
2.50 to |
0.50 to |
0.30 max. |
|
0.35 |
0.35 |
0.6 |
3.5 |
3.5 |
0.70 b) |
||||
|
SNCM815TK |
0.12 to |
0.15 to |
0.30 to |
0.030 max. |
0.030 max. |
4.00 to |
0.70 to |
0.15 to |
0.30 max. |
|
0.18 |
0.35 |
0.6 |
4.5 |
1 |
0.3 |
||||
|
SACM645TK |
0.40 to |
0.15 to |
0.60 max. |
0.030 inax. |
0.030 max. |
0.25 max. |
1.30 to |
0.15 to |
0.30 max. |
|
0.5 |
0.5 |
1.7 |
0.3 |
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