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DIN ST45.8 seamless steel tube

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 DIN ST45.8 seamless steel tube

DIN 17175-79 SEAMLESS STEEL TUBES FOR ELEVATED TEMPERATURES (DIN17175-79)

Sections marked with a dot(●) contain details on agreements which shall, or may be, reached at the time of ordering.

Grade

Mfg. Process

Chemical composition(%)

C
Si
Mn
P
S
Ni
Cr
Mo
Others
St35.8
S
0.17Max
0.10~0.35
0.40~0.80
0.040Max
0.040Max
-
-
-
-
St45.8
S
0.21Max
0.10~0.35
0.40~1.20
0.040Max
0.040Max
-
-
-
-
17Mn4
S
0.14~0.20
0.20~0.40
0.90~1.20
0.040Max
0.040Max
-
0.30Max
-
-
19Mn5
S
0.17~0.22
0.30~0.60
1.00~1.30
0.040Max
0.040Max
-
0.30Max
-
-
15Mo3
S
0.12~0.20
0.10~0.35
0.40~0.80
0.035Max
0.035Max
-
-
0.25~0.35
-
13CrMo910
S
0.10~0.18
0.10~0.35
0.40~0.70
0.035Max
0.035Max
-
0.70~1.10
0.45~0.65
-
10CrMo910
S
0.08~0.15
0.50Max
0.40~0.70
0.035Max
0.035Max
-
2.00~2.50
0.90~1.20
-
14MoV63
S
0.10~0.18
0.10~0.35
0.40~0.70
0.035Max
0.035Max
-
0.30~0.60
0.50~0.70
V : 0.22~0.32
X20CrMoV121
S
0.17~0.23
0.50Max
0.40~0.70
0.030Max
0.030Max
0.30~0.80
10.00~12.50
0.80~1.20
V : 0.25~0.35

 

 

Grade

 

Materia

number

Tensile Test MPa or N/mm2

Remaks(Similar to JIS)

Possibility Temperature

Min Yield point

Tensile Strength

t 16Max 16
St35.8
1.0305
235
225
360~480

Impact Test at Room Temp.kgf-m

(STPT38)

 
St45.8
1.0405
-
245
410~530
23.5(STPT410, STB410)
 
17Mn4
1.0481
-
275
460~580
22.8
 
19Mn5
1.0482
-
315
510~610
23.5(STB52)
 
15Mo3
1.5415
275
275
450~600
23.5
 
13CrMo910
1.7335
295
295
440~590
23.2(STPA22, STBA22)
 
10CrMo910
1.7380
285
285
450~600
23.2(STPA24, STBA24)
 
14MoV63
1.7715
325
325
460~610
24.2
 
X20CrMoV121
1.4922
490
490
690~850
23.5
 

 

 

1. Scope

This standard applies to seamless tubes 1) including tubes for headers of heat-resistant steels according to Table 1 which are used in the construction of boilers, pipe-lines, pressure vessels and equipment for service up to 600℃ and at simultaneous high pressures, where the tototal stress and the relevant scaling conditions can raise or lower the temperature limit.

5. Designation and ordering

5.1. The code numbers for the grades of steel were formed in accordance with Sections 2.1.1.1. and 2.1.2.2 of the Explanations to DIN Normenheft 3, and the material numbers according to DIN 17 007 Part 2.

5.2. The code number or the material number for the steel grade shall be appended to the symbol for the product according to the following examples :

Example 1:

Designation of a seamless steel tubes of 38mm outside diameter and 2.6mm wall thickness according to DIN 2448 of steel St 35.8, material number 1.0385 :

Tabe DIN 2448 - sT 35.8 x 2.6

or Tabe DIN 2448 - 1.0305 - 38 x 2.6

5.3. The order shall not only specify the designation according to Section 5.2 but also in every case the desired total length and the desired acceptance inspection certificate and for unalloyed steel tubes also the steel grade. In addition, further details in compliance with the other Sections marked with a dot(●) can be agreed at the time of ordering.

DIN 8528 Part 1 Weldability; metallic materials, definitions

.

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