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ST37 ST52 E235 E355 Cold Rolled Seamless Carbon Steel Tubes

ST37 ST52 E235 E355 Cold Rolled Seamless Carbon Steel Tubes

ST37 ST52 E235 E355 Cold Rolled Seamless Carbon Steel Tubes
CategoriesPrecision Tube
AlbumView larger image
Brandfushun
OD range:10-150 mm
WT range:2-10 mm
Delivery condition:BK, BKW, BKS, GBK, NBK
Surface condition:Bright, Smooth
FOB portSHANGHAI
Terms of PaymentL/C, D/A, D/P
Update Time2021-04-19
Detail Information

1. Description:

The cold rolled seamless  tubes have closer dimensional tolerances, better surface finish and higher mechanical properties than the corresponding grades of hot finished seamless tubes.

2. Application:

High Precision Cold Rolled Seamless Steel Tube is used in automotive industry, and in the occasion where the high accuracy, brightness, cleanness of the tube are required.

3. Main Features

Superior surface finish

High yield strength

Dimensional accuracy and excellent micro-structure uniformity

Enhanced machinability

High strength to weight ratio

Tight tolerances, resulting in reduced machine time

Possible spiraling eccentricity inherent in product

4. Quality Standard:

DIN 2391 Seamless precision steel tube

BS EN 10305-1 Seamless cold drawn tubes

BS EN 10305-4 Seamless cold drawn tubes for hydraulic and pneumatic power systems

BS 6323-4 Cold finished seamless steel tube

ASTM A519 Seamless Carbon and alloy steel mechanical tubing

JIS G3441 Alloy Steel Tube for machine purpises

JIS G3445 Carbon steel tube for machine structural purposes

5. Chemical Composition(%):

Grade

C

Si

Mn

P

S

Cr

Mo

St 35 (DIN1.0308)

0.17 max

0.35 max

0.40 min

0.025 max

0.025 max

/

/

St 52 (DIN1.0580)

0.22 max

0.55 max

1.60 max

0.025 max

0.025 max

/

/

CFS 4

0.25 max

0.35 max

1.20 max

0.050 max

0.050 max

/

/

CFS 5

0.23 max

0.50 max

1.50 max

0.050 max

0.050 max

/

/

CFS 10

0.26 max

0.35 max

0.80 max

0.050 max

0.050 max

0.80-1.20

0.15-0.30

1020

0.18-0.25

/

0.30-0.60

0.040 max

0.050 max

/

/

1045

0.43-0.50

/

0.60-0.90

0.040 max

0.050 max

/

/

4130

0.28-0.33

0.15-0.35

0.40-0.60

0.040 max

0.040 max

0.80-1.10

0.15-0.25

6. Delivery Conditions:

+C (BK) Hard. No final treatment after final cold rolling.
+LC (BKW) Soft. Final heat treatment is followed by a suitable drawing pass (limited reduction of area).
+SR (BKS) Stress Relieved. After final cold rolling, the tubes are stress relieved in a controlled atmosphere.
+A (GBK) Annealed. After final cold rolling, the tubes are annealed in a controlled atmosphere.
+N (NBK) Normalized. After final cold rolling, the tubes are normalized in a controlled atmosphere.

7. Mechanical Properties( T=20 if not differently stated ):

Grades

Delivery Conditions

Tensile Strength Rm (Mpa)

Yield Strength R2 (Mpa)

Elongation in the longitudinal direction Al (%)

St 35

+C (BK)

480 min

/

6 min

St 35

+LC (BKW)

420 min

/

10 min

St 35

+SR (BKS)

420 min

315 min

14 min

St 35

+A (GBK)

315 min

/

25 min

St 35

+N (NBK)

340-470

235 min

25 min

St 52

+C (BK)

640 min

/

4 min

St 52

+LC (BKW)

580 min

/

7 min

St 52

+SR (BKS)

580 min

420 min

10 min

St 52

+A (GBK)

490 min

/

22 min

St 52

+N (NBK)

490-630

355 min

22 min

E235

+C (BK)

390 min

/

7 min

E235

+A (GBK)

315 min

/

25 min

E235

+N (NBK)

340-480

235 min

25 min

E355

+C (BK)

540 min

/

5 min

E355

+A (GBK)

450 min

/

22 min

E355

+N (NBK)

3490-630

355 min

22 min

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