Which company in Shanghai makes bolts made of 2205 and 2507 duplex stainless steel? And bolts in A2-80, A4-80 and C3-80?

2507 duplex stainless steel UNS S32750 DIN/EN 1.4410? F53? SAF 2507

is a ferrite-austenitic (duplex) stainless steel, which combines many of the most beneficial properties of ferrite and austenitic steels, due to the high chromium and molybdenum content of the steel, therefore has excellent resistance to pitting, crevice corrosion and uniform corrosion. Due to its high chromium and molybdenum content, the steel has excellent resistance to pitting, crevice and uniform corrosion. The bi-directional microstructure ensures high resistance to stress corrosion rupture and high mechanical strength.

Stainless steel is used in the oil and gas industry; offshore oil platforms (heat exchanger tubes, water treatment and water supply systems, fire protection systems, sprinkler systems, water stabilization systems; petrochemical equipment; desalination (desalination) equipment (and equipment in the high-pressure pipe, seawater pipe); both the need for high strength at the same time as the need for high corrosion-resistant mechanical and structural components; combustion (exhaust) gas purification equipment. Main components: 25Cr-7Ni-4Mo-0.27N

Standards:

ASTM/ASME:A240 - UNS S32750

EURONORM:1.4410 - X2CrNiMoN25-7-4

AFNOR:Z3 CN 25.06 Az

DIN/EN 1.4410, ASME SA-240

Chemical composition:

C≤0.03,

Si≤0.80,

Mn≤1.2,

Cr:24-26,

Ni:6-8,

S≤0.02,

P≤0.035 ,

Mo:3-5 ,

N:0.24-0.32

Applications: pulp and paper industry, seawater desalination, flue gas purification, heat exchangers, piping systems for chemical liquid cargo ships, seawater systems, etc..