321 Stainless Steel Plate
321 stainless steel is a stabilized austenitic stainless steel that is derived from 304 by adding titanium (Ti). It is mainly designed to address intergranular corrosion issues in welding or high-temperature environments, and significantly enhances high-temperature strength.
Inquiry Now →

Product Introduction

321 Stainless Steel Plate is a titanium-stabilized austenitic chromium-nickel stainless steel, renowned for its exceptional resistance to intergranular corrosion following exposure to high temperatures (in the range of 425-850°C).

This grade was developed to overcome the "sensitization" or "weld decay" issue common in standard 304 stainless steel. By adding Titanium (Ti) at a minimum of 5 times the carbon content, the titanium preferentially combines with carbon to form stable titanium carbides. This prevents chromium depletion at grain boundaries, thereby preserving the alloy's corrosion resistance even after prolonged high-temperature service or welding. It is the industry-preferred material for applications involving intermittent heating, welding, and exposure to moderately aggressive environments up to about 900°C.

Product parameters


Item / ParameterSpecification for 321Notes / Significance
Key FeatureTi-Stabilized. Superior resistance to intergranular corrosion after high-temperature exposure or welding.Primary reason to choose 321 over 304/304L for high-temp service.
Common DesignationsUNS S32100, AISI 321, EN 1.4541, X6CrNiTi18-10, SUS 321, 0Cr18Ni10TiKey for specification: EN 1.4541 is the common European designation.
Chemical Composition (Typical wt.%)C: ≤ 0.08Titanium content is ≥ 5*C% and ≤ 0.60%. This ratio is critical.

Cr: 17.0 - 19.0Provides oxidation resistance.

Ni: 9.0 - 12.0Maintains austenitic structure and toughness.

Ti: ≥ 5*C%Stabilizing element, prevents chromium carbide formation.
Mechanical Properties (Annealed)Tensile Strength (Rm): ≥ 520 MPaCommon minimum per ASTM A240.

Yield Strength (Rp0.2): ≥ 205 MPa

Elongation (A): ≥ 40%Good formability and ductility.
Physical PropertiesDensity: ~8.0 g/cm³For weight calculations.

Melting Range: ~1400 - 1425 °C

Continuous Service Temp: Up to 900°C (in oxidizing atmospheres)Key advantage over non-stabilized grades.
Key Standards (Plate)ASTM A240/A240M (Specification for Plate/Sheet)Primary procurement standard.

EN 10028-7 (Flat products for pressure purposes)European standard for grade 1.4541.
Common Applications• High-Temperature Fabrications: Aircraft exhaust stacks, heat exchangers, boiler shells, furnace parts.
• Welded Components for Corrosive Service: Tanks, pipes, and vessels in chemical, petrochemical, and food processing.
• Other: Expansion joints, refinery equipment, thermal oxidizers.

Surface selection

0f162d0b-14e0-4984-b1ee-93d5d226fd78

Packaging and transportation

Product storage
Product packaging
Product transportation
  • 07a3e9ebd5226dff67db1ced7546a45e
  • e74298b358dba458433d1c5fca8556de
  • 7cf0f7b087df557f3d87356c7ff41a57
  • 9d1230e4f96d347fd470d730e9a5c7da
  • dbe5116e9adaeea4a971c526e41c17d3
  • a64f2b412e20ebf1ab5e387efee53da7
  • 3eb933541131f528d6098c25db22a6c3
  • 5c3036399c17cd5f7a2d925750d3e388
  • cb1eb78caa26614f5926c5e30a90bb9b
  • d8a0dfc79fea23e534cbc5b682f55f87
  • e513556981a9068dff6de09f6acfbaae
  • 9378ecc25f6cdde6614141200b25f493
  • 8bf352734dd6e6dad394ac0dbb80ff1a
  • 74e55ea40f3a78f51c779d39445b07eb
  • 微信图片_20250805172913_195_9
  • b484aba3fb997f99cc4cb6a13b33ee49
  • 0222_clear
  • d538a4ae1c6a142968cd8bafc650ce19

FACTORY SHOW

  • c1146c2bcfc859f4699fe0e085b93a9d1f42462f4bfec-Wgf42E
  • f4c45c2d6c5478927b0cf6620f64a1afe6697ba91d2b17-8li2Fb
  • 2a47e8efdd7cfa3e01584ecc0812764219aa360a39f1c-tSY0Yd

FAQ

Q:What about your price? 
A:Our price is very competitive because we are a factory. Feel free to contact us if you are interested in our products. 

Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.

Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase. 

Q:Does the product have quality inspection before loading? 
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we
accept the third party inspection absolutely. 

Q:How about the delivery time? 
A:Within 3-15 days after we confirm you requirement. 

Q:What is your terms of payment ?
A:T/T, L/C at sight, Cash, Western Union are all accepted if you have other payment,please contact me. 

Q: Do you provide samples? 
A:Yes,we could offer the sample for you to test but please pay freight fee.

Q:How do we trust your company? 
A:We are a specialized company focusing on global steel trading and supply chain services. Our mission is to provide high-quality, multi-specification, and one-stop steel products and solutions to customers worldwide.

INQUIRY

To learn more about this product, you can submit your requirements here

SUBMIT MESSAGE

RELATED PRODUCTS