EN10305-1 E255 Cold Drawn Seamless Pipe 16*1mm For Automotive Industry

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

-

-

EN10305-1
EN10305-4

E255

1.0408

<= 0.21

<= 0.35

>=0.04

<=0.025

<=0.025

-

-

EN10305-1
EN10305-4

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

Designation

Symbol

Description

Cold finished (hard)

BK

Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.

Cold finished (soft)

BKW

The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).

Cold finished and stress-relieved

BKS

Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.

Annealed

GBK

The last cold forming process is followed by annealing in a controlled atmosphere.

Normalized

NBK

The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.