What type of material is 347?

Type 347 is a niobium-stabilized chromium-nickel austenitic stainless steel. It offers corrosion resistance comparable to grades 304 and 304L

Stainless Steel 321/347 Products

Stainless Steel 321 Plates and Sheets

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Stainless Steel 321 Sheets & Plates Specifications
Chemical Composition of Stainless Steel 321 Plates and Sheets
Mechanical Properties of Stainless Steel 321 Plates and Sheets
Physical Properties of Stainless Steel 321 Plates and Sheets
Equivalent Grades for Stainless Steel 321 Plates
Other Grades of Stainless Steel 321 / 321H Sheets and Plates

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Stainless Steel Grade 321 Plates and Sheets Manufacturer & Supplier in India

Lakshay Steel supplies and exports Stainless Steel 321 Sheets and Plates throughout India and internationally. Our specialty is creating custom-designed stainless steel 321 sheets and plates utilizing premium raw materials. We have an expert team that ensures manufacturer of the highest usability, reliability, and durability standards. We supply various sizes and dimensions of 321 sheets and plates, in addition every product that leaves our facility goes through rigorous testing throughout the production process to ensure it meets our standards.

What is Stainless Steel 321 Sheet Made Of?

Stainless Steel 321 sheet is a high-performance alloy made from chromium, nickel, and titanium. This particular composition gives it great strength and exceptional corrosion and high-temperature resistance. The titanium is included as a stabilizer so that when used in high-temperature applications in 321, it retains its strength and integrity under stressful conditions.

In addition to the engineered functionalities, the titanium and chromium levels also allow for the distinct look of 321 stainless steel, whether for either internal or external use for architectural and design purposes. As an upper-end grade of steel, Stainless Steel 321 Sheet is a widely used steel in demanding industries like aerospace, where a project may involve complexity in strength, precision, and longevity.

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Stainless Steel 321 Sheets & Plates Specifications

Grade	UNS	Werkstoff Nr.
321	S32100	1.4541
321H	S32109	1.4878

Property	Details
Standards	ASTM A240 / ASME SA240
Sizes Available	From 1000×2000 mm to 2000×6000 mm
Thickness	0.5 mm to 200 mm
Manufacturers	Jindal, SAIL, Shah Alloys, Imported, etc.

Chemical Composition of Stainless Steel 321 Plates and Sheets

Typical compositional ranges for stainless steel 321 grades are given in below table:

Grade		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
321H	min. max	0.04 0.10	2.00	0.75	0.045	0.030	17.0 19.0	–	9.0 12.0	–	Ti=4(C+N) 0.70
347	min. max	0.08	2.00	0.75	0.045	0.030	17.0 19.0	–	9.0 13.0	–	Nb=10(C+N) 1.0

Mechanical Properties of Stainless Steel 321 Plates and Sheets

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell B (HR B) max	Brinell (HB) max
321	515	205	40	95	217
321H	515	205	40	95	217
347	515	205	40	92	201

Physical Properties of Stainless Steel 321 Plates and Sheets

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
321	8027	193	16.6	17.2	18.6	16.1	22.2	500	720

Equivalent Grades for Stainless Steel 321 Plates

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN
SS 321	1.4541	S32100	SUS 321	–	–	–	X6CrNiTi18-10

Other Grades of Stainless Steel 321 / 321H Sheets and Plates

Stainless Steel 321 Sheets Plates
Stainless Steel 321H Sheets Plates
SS 321 Sheets Plates
SS 321H Sheets Plates
Stainless Steel 321 UNS S32100 Sheets Plates
SS 321H UNS S32109 Sheets Plates
Stainless Steel 321 Din 1.4541 Sheets Plates
SS 321H Din 1.4878 Sheets Plates

Applications of 321 Stainless Steel Sheet

321 stainless steel sheet is a versatile material that can be used in a multitude of applications. Due to its properties, it is a good choice when an application demands strength, resistance to oxidation, and high temperature performance.

The following are some applications of 321 stainless steel sheet:

Aerospace
Chemical processing
Food and beverage
Heat treating
Power generation

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FAQs

What is type 321 stainless steel?

Type 321 stainless steel is a titanium-stabilized austenitic stainless steel, offering corrosion resistance comparable to 304/304L stainless steel.

Is 321 SS better than 316 SST?

321 stainless steel and 316 stainless steel offer different advantages. 321 excels in high-temperature applications and maintains weld stability. 316 is the preferred choice for superior corrosion resistance, particularly in chemical and saltwater environments. The “better” option depends entirely on the specific application requirements.

What is the difference between 321 and 304 stainless steel?

321 stainless steel is preferred over 304 in industrial applications like chemical, coal, and petroleum industries that operate at high temperatures. 304 stainless steel is widely used in low-temperature applications like furniture decoration, food, and medical industries.

What grade is SS 321 equivalent to?

Stainless steel 321 is similar to grade 304 when annealed. However, it offers better corrosion resistance, especially after welding if it hasn’t been heat-treated, or when used in temperatures between 425 and 900°C

What is the difference between 321 and 321H stainless steel sheets?

The main difference between 321 and 321H stainless steel sheets boils down to strength and workability, especially at high temperatures. 1 Regular 321 is your workhorse – good for welding and general toughness, but not heat-treatable for extra strength. 321H, however, gets a heat treatment that boosts its strength when it’s hot and makes it easier to form. So, if your project involves high heat and needs a bit more oomph or shaping, 321H is likely the better bet. When you’re deciding, just weigh up what’s most important for your specific needs – temperature resistance, strength, corrosion protection, and how easy it is to work with.

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