Corrosion Resistance

It is recommended that a more durable insert grade is used than when machining austenitic chrome steel, e.g. This leads to a microstructure that gives corrosion properties and toughness roughly equal to that of the parent metallic. Testing according to ASTM A262 PRE (Strauss´ check) presents no problems for welded joints in Sandvik SAF 2205™, which move without reservations.

Intergranular Corrosion

Compared with austenitic stainless steels, Sandvik SAF 2205™ has larger proof and a tensile strengths. This must be borne in mind when expanding tubes into tube-sheets. Normal increasing strategies can be used, however the growth requires higher preliminary force and must be undertaken in one operation. Steels of the ASTM 316 kind Stainless steel manufacturer are attacked by erosion corrosion if exposed to flowing media containing highly abrasive stable particles, e.g. sand, or to media with very excessive flow velocities. Under such situations Sandvik SAF 2205™ displays excellent resistance due to its combination of excessive hardness and good corrosion resistance.

Alloy 2205 is a 22% Cr duplex stainless steel, equipped in the resolution annealed situation. As a duplex stainless steel, it combines the fascinating side of properties of each austenitic and ferritic grades. Sandvik SAF 2205™ possesses larger power and higher corrosion resistance than strange austenitic stainless steels. Consequently, Sandvik SAF 2205, has significantly higher fatigue power under corrosive conditions than such steels.

  • Sandvik SAF 2205™ possesses higher energy and better corrosion resistance than odd austenitic stainless steels.
  • Laboratory tests reveal good resistance to stress corrosion cracking of Sandvik SAF 2205™.
  • Alloy 2205 is a 22% Cr duplex stainless steel, equipped in the answer annealed situation.
  • Consequently, Sandvik SAF 2205, has significantly higher fatigue strength underneath corrosive situations than such steels.
  • Duplex stainless steels are far less susceptible to this type of corrosion.
  • As a duplex stainless-steel, it combines the desirable side of properties of both austenitic and ferritic grades.

The material is suitable for use in production tubing and flowlines for the extraction of oil and gas from bitter wells, in refineries and in process solutions contaminated with chlorides. Sandvik SAF 2205™ is particularly suitable for warmth exchangers where chloride-bearing water or brackish water is used as a cooling medium. The steel can be appropriate to be used in dilute sulphuric acid options and for dealing with, natural acids, e.g. acetic acid and mixtures. Being a two-part (austenitic-ferritic) material, Sandvik SAF 2205™ will present a different device put on profile from that of single section steels of types ASTM TP304/304L and TP316/316L. The cutting velocity must, subsequently, be lower than that beneficial for ASTM 304/304L and 316/316L.

China united iron and steel limited Produce and export ASTM A240 304l, A240 304l stainless steel sheet, stainless seamless pipe, stainless steel welded pipes and flat bar.
ASTM A240 standard specification for chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and for general applications A240 grade 800 800H 904L 201 202 XM-19 XM-31 XM-17 XM-18 XM-19 301 301L 302 304 304L 304H 304N XM-21 304LN 305 309S 309H 309Cb 309HCb 310S 310H 310Cb 310HCb 310MoLN 316 316L 316H 316Ti 316Cb 316N 316LN 317 317l 317LM 317LMN 317LN 321 321H 334 347 347H 348 348H XM-15 2205 2304 255 2507 329 405 409 410 410S 429 430 439 434 436 444 XM-33 XM-27

saf 2205 stainless steel

In the identical means as the resistance to pitting could be related to the chromium, molybdenum and nitrogen contents of the steel, so can the resistance to crevice corrosion. Sandvik SAF 2205™ possesses higher resistance to crevice corrosion than steels of the ASTM 316L type. Figure 9 exhibits the results of stress corrosion cracking exams at room temperature in NACE TM test solution A with hydrogen sulphide. The excessive resistance of Sandvik SAF 2205™ is proven in the figure by the fact that very excessive stresses, about 1.1 times the 0.2% proof energy, are required to induce stress corrosion cracking. The ferritic chromium steel ASTM 410 fails at significantly lower stress.

Duplex stainless steels are far less susceptible to this kind of corrosion. Laboratory exams reveal good resistance to emphasize corrosion cracking of Sandvik SAF 2205™. The diagram indicates the temperature-chloride range inside which Sandvik SAF 2205 and the standard steels ASTM TP304L and ASTM TP316L have low susceptibility to emphasize corrosion cracking. Due to its excellent corrosion properties, Sandvik SAF 2205™ is a extremely appropriate material for service in environments containing chlorides and hydrogen sulphide.