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High Precision Seamless Tube
Grade: 10#、20#、T11、T12、T22、T91、T92、ST37,ST52
Standard: DIN2391, DIN2445, EN10305, ASTM A106, ASTM A179,
NBK, GBK, BK, BKW, BKS
Outside Diameter:
Producing Process: Cold-drawing/cold-rolling, Bright annealing, Polishing
Any other requirements, please talk with us.
附1:Chemical Composition
Grade
Chemical Composition (%)
C. max.
Si. Max.
Mn.
P. max.
S. max.
St 35
0.17
0.35
≥0.40
0.025
0.025
St 45
0.21
0.35
≥0.40
0.025
0.025
St 52
0.22
0.55
≤1.60
0.025
0.025
附2:Mechanical Properties
Grade
BK
BKW
BKS
GBK
NBK
T.S.
N/ mm²
minE.%
minT.S.
N/ mm²
minE.%
minT.S.
N/ mm²
minY.S.
N/ mm²
minE.%
minT.S.
N/ mm²
minE.%
minT.S.
N/ mm²
minY.S.
N/ mm²
minT.S.
N/ mm²
minSt35
480
6
420
10
420
315
14
315
25
340
235
25
St45
580
5
520
8
520
375
12
390
21
440
255
21
St52
640
4
580
7
580
420
10
490
22
490
355
22
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High precision seamless steel tube
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