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Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube Best Price In China

Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube Best Price In China

Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube Best Price in China Comprehensive range of Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube applying to Automotive, Food and Beverage, Petrochemical,Ship building, Medical industry or Aerospace. Several years of first...

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Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube Best Price in China

Comprehensive range of Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube applying to Automotive, Food and Beverage, Petrochemical,Ship building, Medical industry or Aerospace.

Several years of first class manufacturing of Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube, renowed & trusted manufacturer, exporter in China of Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube. manufacturing Stainless Steel EN 1.4404 / AISI 316L Grade Round Tubing/tube as per international standards.

Supplying Stainless Steel EN 1.4404 / AISI 316L In China At Factory Price

316L is a low carbon-chromium-nickel-molybdenum austenitic stainless steel with good strength and excellent corrosion resistance, as supplied in the annealed condition with a typical brinell hardness of 175.Characterised by high   corrosion resistance in marine and industrial atmospheres, it exhibits excellent resistance to chloride attack and against complex suphur compounds employed in the pulp and paper processing industries. The addition of 2% to 3% of molybdenum increases its resistance to pitting corrosion and improves its creep resistance at elevated temperatures. The low carbon content reduces the risk of intergranural corrosion (Due to carbide precipitation) during welding, reducing the need for post weld annealing. Finally it displays good oxidation resistance at elevated temperatures.

316L cannot be hardened by thermal treatment, but strength and hardness can be increased substantially by cold working, with susequent reduction in ductility. It is now available with improved machinability (by calcium injection treatment), which has little effect on corrosion resistance and weldability while greatly increasing feeds and/or speeds, plus extending tool life. It is used extensively by the Marine, Chemical, Pulp and Paper, Textile, Transport, Manufacturing and allied industries. Typical uses are: Architectural Components, Textile Equipment, Pulp and Paper Processing Equipment, Marine Equipment and Fittings, Photographic Equipment and X-Ray Equipment etc.. Material non magnetic in the annealed condition, but can become mildly magnetic following heavy cold working. Annealing is required to rectify if necessary. N.B. Optimum corrosion resistance is achieved in the annealed condition.



 

Chemical Composition


Min. %

Max %

Carbon

0

0.03

Silicon

0

1.00

Manganese

0

2.00

Nickel

10.00

14.00

Chromium

16.00

18.00

Molybdenum

2.00

3.00

Nitrogen

0

0.10

Phosphorous

0

0.045

Sulphur

0

0.03

Mechanical Property Requirements - Annealed to ASTM A276-98b   316L

Finish

Cold   drawn

BA   Finish


Dia   or Thickness mm

W.T.:0.6-3mm

Up   to 3mm

O.D.:6-38.1mm

Temsile   Strength Mpa Min.

485

620

485

Yield   Strength Mpa Min.

170

310

170

Elongation   in 50mm % Min.

40

30

30

Typical Mechanical Properties At Room Temperature - Annealed

Finish

Cold   Drawn

Other

Tensile   Strength Mpa

680

590

Yield   Strength Mpa

500

280

Elongation   in 50mm %

42

55

Impact   Charpy V J

190

180

Hardness

HB

195

155

Rc

13


Elevated Temperature Properties

316L   displays good oxidation resistance in continuous service up to 930 oC, and in intermittent service up to 870 oC. Due to its low carbon content it is also less susceptable   to carbide precipitation resulting in intergranular corrosion when heated or   slow cooled through the temperature range 430 oC - 870 oC either in service or   during welding.

There   is however a reduction in mechanical properties as temperature increases.

Typical 0.2% Yield Strength at Elevated Temperatures

Temperature oC

50

100

150

200

250

300

400

450

500

550

0.2%   Yield Strength

182

166

152

137

127

118

108

103

100

98

Mpa   Min.











Low Temperature Properties

316L   as with all of the 300 series austenitic stainless steels has excellent low   temperature properties, with increased tensile and yield strength without   loss of toughness in the annealed condition.

Typical Mechanical Properties - Annealed at Zero and Sub-Zero   Temperatures

Temperature oC

0

-40

-60

-200

-250

Tensile   Strengt Mpa

670

715

800

1250

1430

Yield   Strength Mpa

310

280

300

510

560

Elongation   in 50mm %

67

60

59

61

55

Impact   Izod J

150

150

150



The   combination of high strength and toughness at low temperatures allows this   grade to be used in extremely cold climates or high altitudes, also for   storage of liquified gasses etc. at very low temperatures.

N.B.   316L even when cold worked will still have good high strength and ductility   at sub-zero temperature.

Cold Bending

Cold   bending can be carried out without too much difficulty, however due to the   high work hardening ability of this grade any cold working causing more than   15% deformation should be followed by annealing.



Corrosion Resistance

General Corrosion

316L   has better resistance to general corrosion in most media than 310, 304, 321   grades.

Stress Corrosion Cracking

316L   has a better resistance to stress corrosion cracking in chloride solutions   than 302 or 304 grades, however it can also fail if subjected to high   stresses in an environment conducive to stress corrosion.

Pitting Corrosion

316L   has higher resistance to pitting corrosion than the non molybdenum bearing   grades such as 304, 321, 310 etc..

Intergranular Corrosion

316L   due to its low carbon contenet has greater resistance to intergranular   corosion than all the austenitic stainless steel grades except 304L grade and   321 titanium

Crevice Corrosion

316L   has a higher resistance to crevice corrosion than the non molybdenum bearing   grades such as 304, 321, 310 etc..

N.B.   It is most important that oxygen is always allowed to circulate freely on all   stainless steel surfaces to ensure that a chrome oxide film is always present   to protect it. If this is not the case, rusting will occur as with other   types of non stainless steels. For optimum corrosive resistance, surfaces   must be free of scale and foreign particles.
  Finished parts should be passivated.

Heat Treatment

Bright Annealing

Heat   to 1020oC - 1100oC, hold until temperature   is uniform throughout the section. *Soak as required. Quench in water to   obtain optimum corrosion resistance.

*Actual   soaking time should be long enough to ensure that the part is heated   thoroughly throughout its section to the required temperature, 30 minutes per   25 mm of section may be used as a guide. Please consult your heat treater for   best results.

Machining

316L   improved machinability is slightly more difficult to machine than improved   machinability 304 grade. More difficult to machine than 303 free machining   grade and most of the 400 series stainless steels. It has a typical   machinability rating around 50% - 55% of free machining (S1214) mild   steel.Due to the high work hardening rate of this grade, cutting or drilling   tools etc. must be kept sharp at all times and not cause unnecessary work   hardening of the surface etc..

All   machining should be carried out as per machine maunfacturers recommendations   for suitable tool type, feeds and speeds.

 

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