Duplex stainless steel. Very corrosion resistant very strong and magnetic in this application good.

Across the street, I am lucky, Grönitz do buiseness in steel. Today I found duplex stainless steel. I was looking for something else a weight that drags the chain through the PVC lined hawse pipe but luck favors the prepared mind.
Below is somthing about Duplex.

Duplex stainless steels[1][2][3][4][5] are a family of stainless steels. These are called duplex (or austenitic-ferritic) grades because their metallurgical structure consists of two phases, austenite (face-centered cubic lattice) and ferrite (body centered cubic lattice) in roughly equal proportions. They are designed to provide better corrosion resistance, particularly chloride stress corrosion and chloride pitting corrosion, and higher strength than standard austenitic stainless steels such as Type 304 or 316. The main differences in composition, when compared with an austenitic stainless steel is that the duplex steels have a higher chromium content, 20–28%; higher molybdenum, up to 5%; lower nickel, up to 9% and 0.05–0.50% nitrogen. Both the low nickel content and the high strength (enabling thinner sections to be used) give significant cost benefits. They are therefore used extensively in the offshore oil and gas industry for pipework systems, manifolds, risers, etc. and in the petrochemical industry in the form of pipelines and pressure vessels. In addition to the improved corrosion resistance compared with the 300 series stainless steels duplex steels also have higher strength. For example, a Type 304 stainless steel has a 0.2% proof strength in the region of 280 N/mm2, a 22%Cr duplex stainless steel a minimum 0.2% proof strength of some 450 N/mm2 and a superduplex grade a minimum of 550 N/mm2.

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Sven Yrvind Lastest Videos

Showing 1-6 of 1549 results
26 Aug 2025. If at once you do not succeed, try,try again.
Sven Yrvind
26 Aug 2025. If at once you do not succeed, try,try again.
This Youtube channel is about me Sven Yrvind. I am86 years 4 month old dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a sail to Dunedin in NZ. There I have been promis...
25 Aug 2025 The hatches Tufnol gets prepared for glass fiber
Sven Yrvind
25 Aug 2025 The hatches Tufnol gets prepared for glass fiber
This Youtube channel is about me Sven Yrvind. I am86 years 4 month old dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a sail to Dunedin in NZ. There I have been promis...
24 Aug 2025 Fore hatch, guiding lines
Sven Yrvind
24 Aug 2025 Fore hatch, guiding lines
This Youtube channel is about me Sven Yrvind. I am86 years 4 month old dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a sail to Dunedin in NZ. There I have been promis...
23 Aug 2025  Critical placement of bow hatch latches
Sven Yrvind
23 Aug 2025 Critical placement of bow hatch latches
This Youtube channel is about me Sven Yrvind. I am86 years 4 month old dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a sail to Dunedin in NZ. There I have been promis...
22 Aug 2025 The Evolution of the Oceanic Flaneur
Sven Yrvind
22 Aug 2025 The Evolution of the Oceanic Flaneur
This Youtube channel is about me Sven Yrvind. I am86 years 3 month old dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a sail to Dunedin in NZ. There I have been promis...
21 Aug 2025 Bow & Aft hatches, the start
Sven Yrvind
21 Aug 2025 Bow & Aft hatches, the start
This Youtube channel is about me Sven Yrvind. I am86 years 3 month old dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a sail to Dunedin in NZ. There I have been promis...

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