SS321 Steel Plate

1. Standard: AMS 5510
2. Thickness: 0.6mm - 80mm
3. Width: 100 - 2000mm
4. Length: 1000 - 12000mm Customer's Requirement
5. Grades: alloy 321, sus 321, uns s32100, din 1.4541

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Product Introduction

Stainless steel 321 plate supplier. Contact us to get free quote and sample!

S321 is essentially a modified version of 304 stainless steel with the addition of titanium (Ti). The titanium content in S321 ranges from a minimum of five times (C% - 0.02) to a maximum of 0.70%. HT PIPE is a ams 5510 321 ss plate supplier with 15+ export experience. Contact us for more information and quotes for free!

ASTM A240 321 Stainless Steel Sheet Specification

Product	Stainless steel 321 plate
Type	Hot rolled/ Cold rolled
Thickness	Cold rolled: 0.3-6mm Hot rolled: 3-150mm
Width	1000mm,1220mm,1500mm,2000mm or customized
Length	2000mm,4000mm,6000mm or customized
Surface	2B,No.1,Hairline,Brush,No.4,BA,6K,8K,Mirror,Embossed etc
Standard	AISI, ASTM, DIN, JIS, GB, SUS, EN,etc

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ASTM A240 GR 321 Chemical Composition

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	N	Other
sa240 tp321	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

Manufacturing Process of s32100 sheet

Melting and Continuous Casting: Melting is performed using an electric arc furnace (EAF) and argon oxygen decarburization (AOD) process, with precise control of the chemical composition, particularly the ratio of carbon and titanium.
Hot Rolling: After heating, the slab is hot-rolled in multiple passes to the desired intermediate thickness.
Annealing and Pickling: After hot rolling, solution annealing (heating to over 1000°C followed by rapid cooling) is required to dissolve carbides and achieve a uniform austenitic structure. This is followed by pickling (typically using a nitric-hydrofluoric acid mixture) to remove surface oxide scale.
Cold Rolling (Optional): Cold rolling is performed for products requiring thinner gauges, smoother surfaces, and higher strength.
Finishing: The slab undergoes a final secondary annealing, pickling, and various surface treatments depending on customer requirements.

Material Testing

Hardness Test
Chemical Analysis – Spectro Analysis
Positive Material Identification – PMI Testing
Flattening Test
Micro and MacroTest
Pitting Resistance Test
Flaring Test
Intergranular Corrosion (IGC) Test

Stainless steel 321 plate corrosion resistance

Resistance to intergranular corrosion: This is its most notable characteristic, making it particularly suitable for welded and hot-worked components.
High-temperature performance: The addition of titanium also enhances the material's resistance to high-temperature oxidation and long-term strength. S321 can be used continuously at temperatures below 800°C, with intermittent service temperatures up to 900°C.
Mechanical properties: It exhibits the high toughness, ductility, and moderate strength typical of austenitic stainless steels.
Workability: It can be cold worked, stamped, and stretched using standard processes. Its work hardening rate is similar to that of 304.
Broad corrosion resistance: Similar to 304, it resists attack by the atmosphere, fresh water, foods, a variety of organic and inorganic chemicals, and moderately corrosive media. However, its resistance to pitting corrosion by reducing acids and chlorides is limited, inferior to that of 316 or 317 stainless steel.

Typical Applications of alloy 321 plate

Chemical and Petrochemical: Acetic, sulfuric, and phosphoric acid plants; cracked gas quenching systems in ethylene plants; and organic synthesis processes containing chlorides.
Marine Engineering and Seawater Desalination: Seawater cooling piping systems; preheaters, pumps, and piping in seawater desalination plants; and high-pressure seawater systems on ships.
Flue Gas Desulfurization (FGD) Systems: Wet areas most susceptible to corrosion, such as the absorber spray layer, demister, and outlet flue.
Paper Industry: Equipment and piping in the pulp bleaching process (ClO₂ environment).
Pharmaceutical and Food Industries: Demanding process steps requiring extreme cleanliness and corrosion resistance.
Environmental Protection: Wastewater treatment, particularly for industrial wastewater containing high levels of chlorides, sulfides, or acidic components.