347 Stainless Steel Sheet

347 Stainless Steel Sheet

347 stainless steel sheet The 347 stainless steel sheet is a brand of stainless steel manufactured in accordance with ASTM standards in the United States. 347 stainless steel sheet is equivalent to our 0CR18NI11NB stainless steel sheet. 347 Stainless steel sheet: Chromium 18%, containing nickel...
Product description

347 Stainless Steel Sheet

The 347 stainless steel sheet is a brand of stainless steel manufactured in accordance with ASTM standards in the United States. 347 stainless steel sheet is equivalent to our 0CR18NI11NB stainless steel sheet.

347 Stainless steel sheet: Chromium 18%, containing nickel 11%

347 stainless steel sheet =0cr18ni11nb containing NB to improve intergranular corrosion resistance, with increased strength, plastic does not decrease. Reduce the thickness of the material. As a structural strength component.

347 Stainless Steel sheet heat Treatment: solution treatment (℃) 980-1150 fast Cold

Mechanical properties of 347 stainless steel sheets via solid solution-treated austenitic steel (gb/t4237-92)

Yield Strength ≥ 205/mpa

Tensile Strength ≥ 520/mpa

Elongation Rate ≥ 35%

Hardness Test

HBS ≤ 187

HRB ≤ 90

HV ≤ 200

347 Stainless Steel Sheet Chemical Composition

C ≤ 0.10 

Si ≤ 1.00 

Mn ≤ 2.00 

Cr: 17.0~20.0 

Ni: 9.0~13.0 

Nb: 8×C%~1.5 

S ≤ 0.030 

P ≤ 0.035

TP347 Stainless Steel Tube Mechanical Properties

20℃: 559-637 235-274 53-61 63-69 20.6-27.4 

500℃: 392-429 147-216 28-36 56-66 23.5-28.4 

600℃: 363-382 137-186 28-34 54-65 24.5-30.4 

650℃: 304-363 118-167 31-38 54-61 23.5-31.4

700℃: 245-304 31-42 44-60 24.5-29.4 

TP347 Stainless Steel Tube Physical Constants

Melting Point: 1398-1427 ℃

Density: 7.9g/CM3

Specific Heat Capacity: 500J (kg. K)

Modulus of elasticity: 20 ℃ 196GPa, 200 ℃ for 186GPa, 400 ℃ for 177GPa, 500 ℃ for 167GPa, 600℃ to 167GPa

Resistor: 0.75nN. m

Intergranular Corrosion

Through the copper sulfate plus sulfuric acid addition to CU-chip method (t), copper sulfate plus sulfuric acid (l) and 65%hno3 method (x) to test the antioxidant resistance: in 750-800 ℃ air, this steel has a stable oxidation resistance can be ER347 welding wire.

In the air or chemical corrosive medium can resist corrosion of a high alloy steel, stainless steel is a beautiful surface and corrosion-resistant performance, do not have to go through the surface treatment of plating color, and play stainless steel intrinsic surface properties, used in a variety of steel, usually referred to as stainless steel. Represents the performance of 13 chromium steel, 18-8 nickel and other high alloy steels.

From the metallographic point of view, because stainless steel contains chromium and make the surface of a very thin chrome film, this membrane separates from the steel and the oxygen in the invasion of corrosion resistance.

In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 12% chromium.


Austenitic stainless steel is considered to be the most easily welded alloy steel, can be welded with all the fusion, but also resistance welding.

In the production of austenitic stainless steel welding joints to consider two factors: 1 to maintain its corrosion resistance, 2 to avoid cracking.

It is important to keep the stabilizing elements of Alloy 321 and 347 in the weld. Alloy 321 is more susceptible to loss of titanium, while alloy 347 is frequently liable to lose the CB. You need to avoid the carbon in oil and other sources of pollution and the nitrogen in the air. Therefore, it is necessary to keep clean and to protect the inert gas, whether it is welding stable alloy or unstable alloy.

When welding the metal of austenite structure, it is easy to split during operation. For this reason, Alloy 321 and alloy 347 require a small amount of iron salts to minimize their crack susceptibility when they re solidified. Stainless steel with a CB is more susceptible to thermal cracking than stainless steel containing titanium.

The matching filler metal can be used for welding of alloy 321 and 347 stable steels. The matching filler metal of alloy 347 can sometimes be used for welding of alloy 321.

These stable alloys can be added to other stainless steel or carbon steel. Alloy $number (23% Cr-13. $number ni) or nickel-based filler metals can be used for this purpose.


The annealing temperature range of Alloy 321 and 347 is 1800-2000°f ($number to 1093°c). Although the main purpose of annealing is to enhance the flexibility and ductility of the alloy, but in the range of 800-1500°f ($number to 816°c) carbide precipitation can also eliminate stress, without the formation of intergranular corrosion. Although the long-term heating within this temperature will, to some extent, reduce the general corrosion resistance of the alloy, however, the alloy 321 and 347 can eliminate stress after annealing for several hours in the temperature range of 800-1500°f ($number to 816°c), and their general corrosion resistance will not be significantly reduced. As emphasized, low temperature annealing in the range of 800---1500°f ($number to 816°c) does not cause intergranular corrosion.

If you want to achieve the best ductility, it is recommended to use a higher annealing temperature $number to 2000°f ($number to 1093°c).

When these nickel and stainless steels are processed into equipment, and these devices need to be maximized to prevent the deposition of chromium carbide, it must be recognized that the stability of the CB is different from that of titanium. For these reasons, the degree of stability and the result of protection is less apparent when alloy 321 is applied.

When the corrosion resistance needs to be maximized, the 321 alloy must take a stable annealing treatment. Heating up to 5 hours in the temperature range of 1550 to 1650°f ($number to 899°c), the heating time depends on the thickness. This temperature range exceeds the temperature range of the chromium carbide, which is also sufficient to decompose and dissolve the chromium carbide that has been formed before. In addition, at this temperature, titanium can be combined with carbon to form harmless titanium dioxide. The result is that it is reduced to a solid solution, and carbon is forced to combine with titanium to form harmless carbides.

A stable alloy containing a CB 347 does not require frequent use of this extra treatment.

After heat treatment is done in an oxidizing environment, the annealed oxide is removed from the rust removal solution, such as a mixed solution of nitric acid and hydrofluoric acid. After removing rust, rinse the stainless steel surface thoroughly and rinse away the residual acidic solution.

These alloys cannot be hardened by heat treatment.


No matter how corrosive, stainless steel in the use and manufacture of the process to maintain its surface clean, even in the normal working environment.

In the welding process using inert gas processing, welding the formation of rust skin and molten slag through the stainless steel brush removal. Ordinary carbon steel brushes leave carbon steel particles on the surface of the stainless steel, which eventually causes the surface to rust. In strict conditions, the welding area to be removed rust solution treatment (such as nitric acid and hydrofluoric acid mixed solution) to remove rust and slag, derusting, should thoroughly rinse the surface of stainless steel, rinse out residual acidic solution.

Inland, the light industry uses the material, needs the maintenance to be comparatively few, only the shelter area sometimes needs to use the pressurized water to clean. Heavy industry recommends frequent cleaning and removal of accumulated dust, which could eventually cause corrosion and damage to the surface appearance of the stainless steel.

Proper design is helpful for cleaning. With rounded corners, rounded corners, seamless equipment, is conducive to cleaning and surface polishing.

Reference data is only a typical analysis and cannot be used as the maximum or minimum value of a specification or final product. The data of a particular piece of material may be inconsistent with the reference data above.



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