AISI 321 Stainless Steel Plates Sheets Strips Coils (UNS S32100, 1.4541, SUS 321)

• Type: Stainless Steel Sheets
• Standard: ASTM, AISI
• Grade: 300 Series
• Model NO.: 321
• Certification: AISI
• Shape: Flat
• Technique: Cold Rolled
• Surface Treatment: Bright
• Transport Package: Wooden Pallet
• Specification: 1220*2440, 1500*3000, 1500*6000, 2000*6000mm
• Trademark: TISCO BAO STEEL
• HS Code: 7219340000
• Production Capacity: 50000kgs

Product Description

Quick Detail of Stainless Steel Plate

• Name: original type 321 stainless steel plate
• Thickness: 10.0mm - 150.0mm
• Service: waterjet cutting, laser cutting
• Surface: Hot Rolled NO.1 finished
• Brand: TISCO BAOSTEEL

Description of our stainless steel plate

Commodity	321 Stainless Steel Plate
Main Grade	201,202,304,304L,316,316L,317L,310S,321,904L,410,430 2205 2507 904L
Brand	TISCO ,BAOSTEEL,POSCO,JISCO,LISCO
Certification	SGS,BV,IQI,TUV,ISO,etc
Thickness	10.0-150mm or as customer's requirement
Width	500-2000mm or as customer's requirement
Length	1000-6000mm or as customer's requirement
Surface	No.1 / No.4 / BA / 2B/HL/mirror/polished/brushed(bright annealed,surface not oxidati and brighter)
Standard	JIS,AISI,ASTM,GB,DIN
Delivery time	About10 days
MOQ	1 Ton
Advantages	Showing the splendor of your quality, wearresistant as well ,strong corrosion resistance and decorative effect, durable and beautiful in good taste.

About 321 stainless steel

These titanium bearing stainless steels are stabilized against carbide precipitation and designed for eperation within the damaging temperature range where carbide precipitation develops. In this type of steel, the carbon combines preferentially with titanium to form a harmless titanium carbide, leaving the chromium in solution ot maintain full corrosion resistance. Type 321 is basic type 304 modified by adding titanium in an amount at least 5 times the carbon plus nitrogen contents.

Chemical composition of 321 stainless steel

Grade 321

		C	Mn	Si	P	S	Cr	Mo	Ni	N	Other
321	min. max	- 0.08	2.00	0.75	0.045	0.030	17.0 19.0	-	9.0 12.0	0.10	Ti=5(C+N) 0.70

Features of 321 stainless steel

• Immune to intergranular corrosion when heated within the carbide precipitation range.
• Titanium addition eliminates the formation of chromium carbides at the grain boundaries by tying up the carbon and nitrogen as titanium carbides or nitrides.
• Better high temperature properties than 304 or 304L. Generally used for parts which are intermittently heated up to 1500°F. For continuous service the alloy is good to 1650°F.
• May be susceptible to chloride stress cracking.
• Excellent weldability in field.
• Type 321H has high carbon (.04 to .10) for better high temperature creep properties

Applications

Stainless steels of various kinds are used in thousands of applications. The following gives a flavour of the full range:

• Aircraft exhaust manifolds
• Expansion joints
• Bellows
• Furnace parts
• Heating element tubing
• Heat Exchangers
• Woven or welded screens for high temperature mineral processing
• Spiral Welded tube for burner pipes and flues

Back ground of 321 stainless steel

Grades 321 and 347 are the basic austenitic 18/8 steel (Grade 304) stabilised by Titanium (321) or Niobium (347) additions. These grades are used because they are not sensitive to intergranular corrosion after heating within the carbide precipitation range of 425-850°C. Grade 321 is the grade of choice for applications in the temperature range of up to about 900°C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion.
Grade 321H is a modification of 321 with a higher carbon content, to provide improved high temperature strength.
A limitation with 321 is that titanium does not transfer well across a high temperature arc, so is not recommended as a welding consumable. In this case grade 347 is preferred - the niobium performs the same carbide stabilisation task but can be transferred across a welding arc. Grade 347 is therefore the standard consumable for welding 321. Grade 347 is only occasionally used as parent plate material.
Like other austenitic grades, 321 and 347 have excellent forming and welding characteristics, are readily brake or roll formed and have outstanding welding characteristics. Post-weld annealing is not required. They also have excellent toughness, even down to cryogenic temperatures. Grade 321 does not polish well, so is not recommended for decorative applications.
Grade 304L is more readily available in most product forms, and so is generally used in preference to 321 if the requirement is simply for resistance to intergranular corrosion after welding. However 304L has lower hot strength than 321 and so is not the best choice if the requirement is resistance to an operating environment over about 500°C.

Possible alternative grades to 321 grade stainless steel

Grade	Why it might be chosen instead of 321
304L	The requirement is for resistance to intergranular corrosion, not for high temperature strength
3CR12	Only mild "high temperature" environment is present… up to about 600°C.
304H	Only mild "high temperature" environment is present… up to about 800°C.
310	The temperature of the operating environment is up to about 1100°C - too high for 321 or 321H.
S30815 (253MA)	The temperature of the operating environment is up to about 1150°C- too high for 321 or 321H.