COLD ROLLED/COLD DRAWN PRECISION STEEL TUBE

Material Chemical Composition (%)

Standard

Steel Grade 

Material Number

C   

Si     

Mn

P    

S   

Cr

Mo

DIN 2391

ST35

1.0308

<= 0.17

<= 0.35

>=0.04

<=0.025

<=0.025

-

-

ST45 

1.0408

<= 0.21

<= 0.35

>=0.04

<=0.025

<=0.025

-

-

ST52

1.058

<= 0.22

<= 0.55

<=1.60

<=0.025

<=0.025

-

-

BK

BKW

BKS

GBK

Steel Grade 

Rm Tensile Strength  (Mpa) Min

A Elongation(%) Min

Rm Tensile Strength (Mpa) Min

A Elongation(%) Min

Rm Tensile Strength (Mpa) Min

Rel Yield Strength(Mpa) Min

A             Elongation  (%) Min

Rm Tensile Strength (Mpa)Min

A Elongation (%)Min

ST35

480

6

420

10

420

315

14

315

25

ST45 

580

5

520

8

520

375

12

390

21

ST52

640

4

580

7

580

420

10

490

22

Standard

Steel Grade 

Material Number

C   

Si     

Mn

P    

S   

Cr

Mo

EN10305-1
EN10305-4

E235

1.0308

<= 0.17

<= 0.35

>=0.04

<=0.025

<=0.025

-

-

E255

1.0408

<= 0.21

<= 0.35

>=0.04

<=0.025

<=0.025

-

-

E355

1.058

<= 0.22

<= 0.55

<=1.60

<=0.025

<=0.025

-

-

Steel Grade 

(+C)

(+LC)

(+SR)

(+A)

(+N)

Rm Tensile Strength  (Mpa) Min

A Elongation(%) Min

Rm Tensile Strength (Mpa) Min

A Elongation(%) Min

Rm Tensile Strength (Mpa) Min

Rel Yield Strength(Mpa) Min

A             Elongation  (%) Min

Rm Tensile Strength (Mpa)Min

A Elongation (%)Min

Rm Tensile Strength (Mpa)

Rel Yield Strength  (Mpa) Min

A Elongation (%) Min

E235

480

6

420

10

420

350

16

315

25

340-480

235

25

E255

580

5

520

8

520

375

12

390

21

440-570

255

21

E355

640

4

580

7

580

450

10

450

22

490-630

355

22