Qingdao Shengying Steel Co., Ltd.

Stainless Steel Strip

Stainless Steel Coil is a thin steel plate supplied in coils, also known as strip steel. There are imported and domestic products, which are divided into hot-rolled and cold-rolled varieties. We can also order various special-shaped steel materials based on the specific requirements of different users. To ensure that the yield strength, tensile strength, elongation, and hardness of the stainless steel coils meet the required standards, they must undergo heat treatments such as annealing, solution treatment, and aging treatment before delivery.

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Stainless Steel Coil

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In order to ensure that the mechanical properties such as yield strength, tensile strength, elongation and hardness of various stainless steel coils meet the requirements, stainless steel coils must undergo heat treatments such as annealing, solution treatment, and aging treatment before delivery. The corrosion resistance of stainless steel coils mainly depends on its alloy composition (chromium, nickel, titanium, silicon, aluminum, etc.) and the internal structure of stainless steel coils, and the main role is chromium. Chromium has high chemical stability and can form a passivation film on the steel surface to isolate the metal from the outside world, protect the steel coil from oxidation, and increase the corrosion resistance of the steel coil. After the passivation film is destroyed, the corrosion resistance decreases.

Stainless steel coil surface marks and corresponding features

SURFACE	CHARACTERISTICS	SUMMARY OF MANUFACTURING METHOD	USE
NO.1	Silver	Hotrolled to specified thickness	No need for a glossy finish
NO.1	Matt	Hotrolled to specified thickness	No need for a glossy finish
NO.2D	Silver	Heat treatmentand picklingafter cold rolling	General materials, deep drawingmaterials
NO.2B	Luster is stronger than No.2D	After NO.2D treatment the polishingrolleris used for the finalmild cold rolling	The general material
BA	Brightas a mirror	Non - standard, butusuallybrightannealingsurface machining surface reflectivityis very high	Buildingmaterials, kitchenware
NO.3N	Coarse grinding	Grind with 100-200# (unit grindingstrip)	Buildingmaterials, kitchenware
NO.4N	Intermediategrinding	The polishedsurface obtainedby grindingwith 150-180# grindingstrip	Buildingmaterials, kitchenware
NO.240	Fine grinding	Grind with2408 grindingstrip	Kitchen utensils
NO.320	Very fine grinding	Grind with 320# grindingstrip	Kitchen utensils
NO.400	The gloss is close to BA	Grind with 400# polishingwheel	General timbec constructiontim bec kitchen utensils
HL	Hairlinegrinding	Suitable particlematerials for hair texture grinding(150-240#) its grains are very large	Building buildingmaterial
NO.7	It's close to mirrorgrinding	Grind with 600# rotarypolishingwheel	For art or decoration
8K	Mirror grinding	The mirroris ground witha polishingwheel	Reflector, decorative

Corrosion resistance of 321 stainless steel

The high-temperature uniform corrosion and electrochemical corrosion behavior of 321 stainless steel in uranyl nitrate solutions with different concentrations and pH values were studied by weighing method and electrochemical method.

The results of the uniform corrosion test show that under the selected corrosion conditions, the surface finish of the 321 stainless steel sample has no obvious change within 960 hours, the corrosion rate is less than 0.04g/m2, and it is resistant to corrosion in low acidity uranyl nitrate solution.

The corrosion electrochemical characteristics of 321 stainless steel in uranyl nitrate solution with dissolved oxygen were studied by corrosion electrochemical method, and the corrosion potential and corrosion current density of the electrode were measured. After analysis, there is a certain amount of uranium in the corrosion film of the sample after electrochemical corrosion, and the thickness of the corrosion film containing uranium is 10~15nm according to the depth analysis.

Stainless steel grade comparison table

China GB		Japan	United States			Taiwan, China
old grade	new grade	JIS	ASTM			UNS	CNS
Austenitic stainless steel
1Cr17Mn6Ni5N	12Cr17Mn6Ni5N	SUS201		201	S20100		201
1Cr18Mn8Ni5N	12Cr18Mn9Ni5N	SUS202		202	S20200		202
1Cr17Ni7	12Cr17Ni7	SUS301		301	S30100		301
0Cr18Ni9	06Cr19Ni10	SUS304		304	S30400		304
00Cr19Ni10	022Cr19Ni10	SUS304L		304L	S30403		304L
0Cr19Ni9N	06Cr19Ni10N	SUS304N1		304N	S30451		304N1
0Cr19Ni10NbN	06Cr19Ni9NbN	SUS304N2		XM21	S30452		304N2
0Cr23Ni13	06Cr23Ni13	SUS309S		309S	S30908		309S
0Cr25Ni20	06Cr25Ni20	SUS310S		310S	S31008		310S
0Cr17Ni12Mo2	06Cr17Ni12Mo2	SUS316		316	S31600		316
0Cr18Ni12Mo3Ti	06Cr17Ni12Mo2Ti	SUS316Ti		316Ti	S31635		316Ti
00Cr17Ni14Mo2	022Cr17Ni12Mo2	SUS316L		316L	S31603		316L
0Cr17Ni12Mo2N	06Cr17Ni12Mo2N	SUS316N		316N	S31651		316N
00Cr17Ni13Mo2N	022Cr17Ni13Mo2N	SUS316LN		316LN	S31653		316LN
0Cr18Ni12Mo2Cu2	06Cr18Ni12Mo2Cu2	SUS316J1		-	-		316J1
00Cr18Ni14Mo2Cu2	022Cr18Ni14Mo2Cu2	SUS316J1L		-	-		316J1L
0Cr19Ni13Mo3	06Cr19Ni13Mo3	SUS317		317	S31700		317
00Cr19Ni13Mo3	022Cr19Ni13Mo3	SUS317L		317L	S31703		317L
0Cr18Ni10Ti	06Cr18Ni11Ti	SUS321		321	S32100		321
Austenitic-ferritic stainless steel (duplex stainless steel)
0Cr26Ni5Mo2	-	SUS329J1	329	S32900		329J1
00Cr18Ni5Mo3Si2	022Cr19Ni5Mo3Si2N	SUS329J3L	-	S31803		329J3L
Ferritic stainless steel
-	022Cr11Ti	SUH409	409	S40900		409L
00Cr12	022Cr12	SUS410L	-	-		410L
1Cr17	10Cr17	SUS430	430	S43000		430
1Cr17Mo	10Cr17Mo	SUS434	434	S43400		434
-	022Cr18NbTi	-	-	S43940		439
00Cr18Mo2	019Cr19Mo2NbTi	SUS444	444	S44400		444
Martensitic stainless steel
1Cr13	12Cr13	SUS410	410	S41000		410
2Cr13	20Cr13	SUS420J1	420	S42000		420J1
3Cr13	30Cr13	SUS420J2	-	-		420J2
7Cr17	68Cr17	SUS440A	440A	S44002		440A

Product Name	Stainless Steel strip
Length	As required
Width	3mm-2000mm or as required
Thickness	0.1mm-300mm or as required
Standard	AISI,ASTM,DIN,JIS,GB,JIS,SUS,EN,etc.
Technique	Hot rolled / cold rolled
Surface Treatment	2B or according to customer requirement
Thickness tolerance	±0.01mm
Material	201, 202, 301, 302, 303, 304, 304L, 304H, 310S, 316, 316L, 317L, 321,310S 309S, 410, 410S,420, 430, 431, 440A,904L
MOQ	5 tons.We also can accept sample order.
Shipment time	Within 15-20 workdays after receiving deposit or L/C

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Qingdao Shengying Steel Co., Ltd., Ltd. as a leader manufacturer in steel supplier from China, is a reliable and integrity steel supplier. With more than 10 years steel processing and exporter experiences, we have a factory building of 20000 square meters and annual production of 23,000 tons. We specialized in the production of stainless steel, carbon steel, galvanized steel, aluminum, copper products, etc., suitable for fields such as engineering, coal mining, textiles, electricity, boilers, machinery, etc. Our products have passed the ISO9001 quality system certification and the EU CE certification.

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We adhere to the management principle of "quality first, service first, continuous improvement and innovation, and customer satisfaction", with the quality goal of "zero defects, zero complaints". Looking forward to cooperate with you long term.

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Our major products including Carbon Steel Plate, Carbon Steel Coil, Carbon Steel Pipe, Carbon Steel Bar, Stainless steel plate,Stainless steel coil , Stainless steel pipe, color coated coil, color tile, galvanized sheet, galvanized coil, Galvanized roofing,etc.

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Our company has extensive experience in the development and export of metal and steel materials. Our company is the long-term reliable steel supplier you are looking for!

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Products are widely used in aerospace, building bridges, precision instruments, petrochemical and other industries.We manufacture own brand steel products and also we can supply other famous brand steel product.