409L Stainless steel sheet Price in China ,Manufacturer of 409L Stainless Steel sheet

With its excellent corrosion resistance, 409L stainless steel is suitable for prolonging the life of automobiles and lightening the weight of automobiles. As an environmentally friendly material for recycling, GM, Ford, Volkswagen, DaimlerChrysler and other major automobile manufacturers adopt 100% stainless steel in their exhaust systems.
Automobile exhaust system will be produced by the automobile engine high temperature, high speed combustion exhaust gas processing, it discharged outside the car.
The main function of the exhaust system is to reduce vibration and noise, and to convert the exhaust gas into a clean gas after it is reburned.
The automobile exhaust system is the longest part of the automobile parts, the system to withstand great temperature changes (-20 ~ 850℃) and high temperature, high speed exhaust gas of high frequency vibration, and in the car the largest change, the most complex environment, 409L can withstand the temperature limit of (-20 ~ 650℃).
Recently, due to environmental protection on the automobile exhaust standards increasingly strict, short distance urban driving increase, winter snow removal agent spread and other reasons, the use of exhaust system standards are increasingly strict, from the European Ⅱ- European standard, the traditional steel can not meet its technical requirements, high-end motorcycle exhaust system has been used 409L material.
The amount of 409L stainless steel used for each vehicle is 35KGS-65KGS.

409L high temperature resistance, can achieve high efficiency of the engine and exhaust system, and reduce the thickness of the exhaust system, can reduce exhaust emissions.
409L low cost, good flexibility, high rate of finished material, easy to replace, belongs to the environmental protection of new products.

Standard Specification Of 409L Plate

Thickness	4mm-100mm
Width	1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc
Length	2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Surface	2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc
Finish	Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Form	Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc.

409L stainless steel composition content.

Grade		C	Mn	Si	P	S	Cr	Ti	Ni	N
409L	Min. Max.	0.75 - 0.50	≤1.00	≤1.00	≤0.04	≤0.03	11	1	10.5~11.7

(1) When 409L steel crystallizes, the solid-liquid two-phase zone is very small, less than 30℃;
(2) There is almost no γ phase at high temperature.
Therefore, when 409L steel begins to crystallize after casting, the liquid phase has a large degree of undercooling due to direct contact with the surface of the crystallizer. At the same time, the surface of the crystallizer promotes non-spontaneous nucleation. Therefore, the nucleation rate of the liquid phase is high, forming fine equiaxed grains on the surface.
The formation rate of fine equiaxed grains on the surface is very fast, and the titanium carbide is too short to precipitate at this time.
After the formation of fine equiaxed grains, columnar grains are formed in ordinary steels, but there is no columnar grains in 409L steel.
The columnar grains of 409L steel are not easy to grow forward because of the narrow temperature range of liquid-solid two-phase region and the small subcooling zone during crystallization.
At the same time, after the formation of fine equiaxed crystal region, after a period of time, titanium and carbon have time to diffuse and form titanium carbide particles, promoting non-spontaneous nucleation.
The above two reasons make equiaxed grains appear in this region instead of columnar grains.
There is no columnar crystal structure on the cross section, but equiaxed crystal with different sizes.
During the casting process, when the billet temperature drops to 1100℃, if the carbon content is high, part of Cr and C will form carbides, resulting in a chromium poor zone around the carbides, and a small amount of δ phase may appear.
At this time, there are two phases with different properties in the steel, or the content of δ phase is between 32% and 60%, which is the plastic zone of the blank.
The carbon content of 409L steel is very low, even if δ phase is present, the amount is very small.
Therefore, there is no significant impact on performance.

409L steel from high temperature to low temperature almost no α→γ phase transformation, so the grain is easy to grow up, there are thick ferrite structure, low strength, in continuous casting, after the slab is cut up, prone to bend phenomenon, affect the normal production.
The main problem during crystallization of 409L steel is the degradation of properties caused by coarse grain size≥192HB

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  409L Stainless steel sheet

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  409L Stainless steel sheet

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  409L Stainless steel sheet

409L Characteristic machining technology

1D -- The surface has discontinuous granular shape, also known as fog surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2D - A slightly silvery white colour.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
2B -- Silver white with better gloss and flatness than a 2D surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + quenching and tempering rolling.
Ba - Excellent surface gloss, high reflectivity, like a mirror surface.
Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + surface polishing + quenching and tempering rolling.
No.3 -- Good gloss, coarse grain surface.
Processing technology: polishing and tempering rolling for 2D or 2B with 100~120 abrasive materials (JIS R6002).
No.4 -- Good gloss, fine lines on the surface.
Processing process: polishing and tempering rolling for 2D or 2B with 150~180 abrasive materials (JIS R6002).
HL -- Silver grey with hair streaks.
Processing technology: 2D products or 2B products with appropriate granularity of abrasive materials for polishing the surface is a continuous abrasive grain.
MIRRO -- Specular.
Processing technology: 2D products or 2B products with appropriate granularity of the grinding material grinding and polishing to the mirror effect.

Stainless Steel 409L Plate Price List					409LSheet FOB Shanghai Per Unit (USD)
2mm 409L stainless steel plate					$1500.00-$2000.00
ss 409L mirror Stainless Steel Coil/ Strip/ Sheet					$1800.00-$2300.00
409L Stainless Steel Plate / Stainless Steel Sheet 409L					$1500.00-$2000.00
Standard size 4x8 metal sus 409L grade stainless steel checkered Sheet prices					$1500.00-$2000.00