Mar 01, 2019 The usual challenge for stainless steel pickling involves removing all scale, iron contamination, and welding oxides to achieve a fully passivated surface with an even, clean, and aesthetic finish. In this case, a new nitric-acid-free process. Pickling time or a less aggressive pickling agent. The addition of nickel to the austenitic and austenitic-ferritic steels further improves their corrosion resist-ance. Austenitic is the most widely used type of stainless steel. It has a nickel content of at least 7%. This makes the steel structure fully austenitic and gives it non-mag.
![Acid Pickling Of Martensitic Steel Acid Pickling Of Martensitic Steel](http://patentimages.storage.googleapis.com/WO2004035861A1/imgf000022_0001.png)
DIN EN X17CrNi16-2 1.4057 Martensitic Stainless Steel Seamless Pipe for brake system
Introduction:
431 stainless steel is a hardenable martensitic stainless steel alloy. It is required when strength, hardness and wear resistance is required with some corrosion resistance.
Application:
This steel is ideal for use in the manufacture of highly stressed parts found in a variety of industries including petrochemical, automotive and power generation.
Steel chemical & mechanical:
C | SI | MN | P | S | NI | CR |
MAX 0.20 | MAX 1.00 | MAX 1.00 | MAX 0.040 | MAX 0.030 | 1.25-2.25 | 15.0-17.0 |
Mechanical properties in annealed condition:
Yield strength N/mm2 | Tensile strength N/mm2 | Elongation % |
275 MIN | 480 MIN | 16 MIN |
Outside diameter range: 6-219mm
Wall thickness range:0.5-25.4 mm
Seamless Steel Pipe Process: Round bar→punched→grinded surface→annealed→grinded surface→acid pickling→cold rolled→annealed→Acid pickling or polished→cutting length→package
Delivery condition: Annealed
Surface condition: Acid pickling / polished
Finished products Test: Chemical, Tensile test, intergranular corrosion, flat test, expand test, nonmetallic inclusion, hydraulic test.
Any question and inquiry, welcome to contact us: harris(at)fushunsteeltube.com or + 86 186 9227 5455.