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DIN1630 High Performance Unalloyed Seamless Circular Steel Pipe Grade ST 37.4 / 44.4 / 52.4 

Place of Origin: Jiangsu, China (Mainland) 
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DIN1630 HIGH PERFORMANCE SEAMLESS CIRCULAR UNALLOYED STEEL TUBES
 
 

 

 

DIN1630 HIGH PERFORMANCE SEAMLESS CIRCULAR UNALLOYED STEEL TUBES

 

 

Specifications:

 

Surface Treatment: Oiling/Black painting/Varnish/Passivation/Phosphating/Pickling

Ends: PE, ends caps

Marking: as per requirement

Delivery Condition: Annealed/Normalized/Tempered

Size:(mm)
      OD: ≤660mm         

   or as per customer’s requirement
Length: ≤16m. Fixed Length (6m,9m,12m, 16m or as per requirement) or random length

Package: Hexagonal Bundles with steel strips and plastic wrapping outside/Wooden box/Wooden crate/Steel frame/As per customer’s requirement

 

 

CHEMICAL COMPOSITION (%):

 

CHEMICAL COMPOSITION (CAST ANALYSIS) IN%

Grade

C≤

Si≤

Mn

P≤

S≤

ST 37.4

1.0255

0.17

0.35

≥ 0.35

0.040

0.040

ST 44.4

1.0257

0.20

0.35

≥ 0.40

0.040

0.040

ST 52.4

1.0581

0.22

0.55

≤ 1.60

0.040

0.035

 

 

MECHNICAL PROPERTIES:

 

STEEL GRADE

Tensile Strength

σb(Mpa)

N/mm2

Yield Strength σs(Mpa)

(WT in mm)

Elongation      δ(%)

(L=5do)

IMPACT

(DVM—TEST SAMPLE)

≤16

16≤40

40≤65

L

T

L

T

(MIN) N/mm2

% (MIN)

δ (MIN)

ST 37.4

1.0255

350-480

235

225

215

25

23

43

27

ST 44.4

1.0257

420-550

275

265

255

21

19

43

27

ST 52.4

1.0581

500-650

355

345

335

21

19

43

27

                       

 

 

DIMENSION TOLERANCE:

 

OD (mm)

Permissible daviation in OD

Tube Barrel and tube ends

At tube ends, subject to particular agreement 1)

≤ 100

±1% (value up to ±0.5mm are permitted)

± 0.4 mm

100 − 200

±1%

± 0.5% 

> 200

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Company Info

CHANGZHOU RUIYUAN STEEL TUBE CO., LTD. [China (Mainland)]


Business Type:Manufacturer
City: Changzhou
Province/State: Jiangsu
Country/Region: China (Mainland)

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