ASTM A249 309s / 309SNb Ss Tube For Boiler 

Grade 309S stainless steel has high corrosion resistance and strength compared to 304 stainless steel. The following datasheet gives an overview of grade 309 stainless steel.
1) Grade: 304, 304L, 316, 316L, 321L, 317, 317H, 321, 321L, 310s etc
2) Standard: ASTM A312, ASTM A213, ASTM A269, ASTM A511
3) OD: 6mm-830mm WT: 0.5mm-50mm
4) Processing Method: Cold Drawn, Cold Rolled, Hot Rolled
5) Length: Max. 13m, or according to the clients' specific demands
6) Surface treatment: 2B, BA
7) Ends: Plain ends, or Bevelled ends
8) Packing: Each in PVC bags, bundles with knitted plastic bag, wooden cases or according to customers' request
9) Test: Eddy current / hydrostatic/ Ultrasonic/ Intergranular Corrosion, or according to customers' request
he following table shows the chemical composition of grade 309S stainless steel.
  Product Application: The products are widely used in fertilizer, petroleum, central-station, boiler, power station, shipping military, chemical industry, environment protection, traffic, metallurgy and mine, printing and dyeing, food industry, medical equipment, and so on.

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