DIN 17458 Austenitic Seamless Stainless Steel Pipe
DIN 17458 austenitic seamless stainless steel pipe is mainly used in pressure vessel chemical plant and pipeline transportation.
Description
DIN 17458 Austenitic Seamless Stainless Steel Pipe
Standard: DIN 17458
DIN 17458 austenitic seamless stainless steel pipe is mainly used in pressure vessel chemical plant and pipeline transportation.
DIN 17458 Austenitic Seamless Stainless Steel Pipe can be supplied by Category 1 and category 2.
The difference between steel pipes in test category 2 and steel pipes in test category 1:
There are more detailed inspection procedures for steel pipes in Test Category 2.
Main steel grades:
X5CrNi18 10, X2CrNi19 11, X2CrNiN18 10, X6CrNiTi18 10, X6CrNiNb 18 10, X5CrNiMo 17 12 2, X2CrNiMo 17 13 2, X6CrNiMoTi 17 12 2, X6CrNiMoNb 17 12 2, X2CrNiMoN 17 13 3, X2CrNiMo 18 14 3, X5CrNiMo 17 13 3, X2CrNiMoN 17 15.5
Manufacture:
Steel pipes shall be produced by hot-working, cold-rolling, hot-pressing and cold-drawing or by combination of these procedures.
Delivery status & heat treatment
DIN 17458 austenitic seamless stainless steel pipe. Accurate heat treatment requires that the pipe be quenched in water after hot working and solution annealing.
Chemical composition of DIN 17458 Austenitic Seamless Stainless Steel Pipe
| Steel Grade | Chemical composition,% | |||||
| Grade | Material | C,≤ | Cr | Mo | Ni | Other |
| X5 CrNi 18 10 X2 CrNi 19 11 X2 CrNiN 18 10 X6 CrNiTi 18 10 X6 CrNiNb 18 10 |
1.4301 1.4306 1.4311 1.4541 1.4550 |
0.07 0.030 0.030 0.08 0.08 |
17.0 19.0 18.0 20.0 17.0 19.0 17.0 19.0 17.0 19.0 |
– – – – – |
8.5 10.5 10.0 12.5 8.5 11.5 9.0 12.0 9.0 12.0 |
–
– N: 0.12~0.22 Ti: 5% C, up to 0.80 Nb: 10% C, up to 1.00 |
| X5 CrNiMo 17 12 2 X2 CrNiMo 17 12 2 X6 CrNiMoTi 17 12 2 X6 CrNiMoNb 17 12 2 |
1.4401 1.4404 1.4571 1.4580 |
0.07 0.030 0.08 0.08 |
16.5 18.5 16.5 18.5 16.5 18.5 16.5 18.5 |
2.0 2.5 2.0 2.5 2.0 2.5 2.0 2.5 |
10.5 13.5 11.0 14.0 10.5 13.5 10.5 13.5 |
–
– Ti: 5% C, up to 0.80 Nb: 10% C, up to 1.00 |
| X2 CrNiMoN 17 13 3 X2 CrNiMo 18 14 3 X6 CrNiMo 17 13 3 |
1.4429 1.4435 1.4436 |
0.030 0.030 0.07 |
16.5 18.5 17.0 18.5 16.5 18.5 |
2.5 3.0 2.5 3.0 2.5 3.0 |
11.5 14.5 12.5 15.0 11.0 14.0 |
N:0.14~0.22; S≤ 0.025
S ≤0.025 S≤ 0.025 |
| X2 CrNiMoN 17 13 5 | 1.4439 | 0.030 | 16.5 18.5 | 4.0 5.0 | 12.5 14.5 | N:0.12 ~0.22; S≤ 0.025 |
Mechanical properties of DIN 17458 Austenitic Seamless Stainless Steel Pipe
| Steel Grade | 2%minimum guaranteed stress | 1%minimum guaranteed stress | Tensile strength, MPa | Elongation | Minimum impact energy | Intergranular Corrosion Resistance | ||||
| Grade | Material | Portrait | Transverse | Portrait | Transverse | Supply Conditions | Follow-up processing after casting without heat treatment | |||
| X5 CrNi 18 10 X2 CrNi 19 11 X2 CrNiN 18 10 X6 CrNiTi 18 10 X6 CrNiNb 18 10 |
1.4301 1.4306 1.4311 1.4541 1.4550 |
195 180 270 200 180 205 |
230 215 305 235 215 240 |
500~700 460~680 550~760 500~730 460~680 510~740 |
40 40 35 35 35 35 |
35 35 30 30 30 30 |
85 | 55 | 300 350 400 400 400 400 |
300 350 400 400 400 400 |
| X5 CrNiMo 17 12 2 X2 CrNiMo 17 12 2 X6 CrNiMoTi 17 12 2 X6 CrNiMoTi 17 12 2 X6 CrNiMoNb 17 12 2 |
1.4401 1.4404 1.4571 1.4571 1.4580 |
205 190 210 190 215 |
240 225 245 225 250 |
510~710 490~690 500~730 490~690 510~740 |
40 40 35 35 35 |
30 30 30 30 30 |
85 | 55 | 300 400 400 400 400 |
300 400 400 400 400 |
| X2 CrNiMoN 17 13 3 X2 CrNiMo 18 14 3 X6 CrNiMo 17 13 3 |
1.4429 1.4435 1.4436 |
295 190 205 |
330 225 240 |
580~800 490~690 510~710 |
35 40 40 |
30 30 30 |
85 | 55 | 400 400 300 |
400 400 300 |
| X2 CrNiMoN 17 13 5 | 1.4439 | 285 | 315 | 580~800 | 35 | 30 | 85 | 55 | 400 | 400 |
Note:Thickness of applicable pipe less than 50 mm
Classification of DIN 17458 Austenitic Seamless Stainless Steel Pipe
| Code | Types | Surface Polishing | Remarks |
| C1 | Rust Removal by Hot Processing Heat Treatment | Metal descaling | |
| C2 | Hot working heat treatment pickling | ||
| f | Mechanical and Chemical Rust Removal Cold Processing Unheat Treatment | Metal polishing is smoother than C1 and C2 | Cold Working Change without Continuous Heat Treatment
Property depends only on the degree of processing. Austenitic steel pipe |
| g | Cold working and heat treatment without rust removal | Descaling | Applicable only to parts that have been de-rusted or processed |
| h | Cold Processing, Heat Treatment and Pickling | Metal pickling gloss is smoother than C2 | |
| m | Cold Processing Scaleless Heat Treatment | Metal annealing gloss is smoother than h | |
| n2 | Refining Heat Treatment of Polishing Rail System by Secondary Cold Rolling | Metal annealing gloss is smoother than h or M | Particularly suitable for grinding and polishing |
| o | Polish | The method and degree of metal grinding should be agreed upon at the time of ordering. | Conditions h m and N 2 are usually used as initial conditions |
| p | Polishing | Quality and method of metal polishing and polishing should be agreed upon at the time of ordering. |
Note:Orders should indicate that polishing or polishing is used internally or externally or both.
Testings
Casting Analysis
Tension testing at high temperature
Shock detection
Leveling test
Non-destructive testing
Leakproof Seal Inspection
Naked eye test
Material Certification Inspection
Dimension Inspection
Thermal Tensile Test
Intergranular corrosion test