Stainless Steel 321 (UNS S32100)

SPECIFICATIONS: GRADE 321 | UNS S32100 | ASTM/ASME A240 | Werkstoff 1.4541

wilsonpipeline Pipe Industry Co., Limited is stockists and suppliers of 321 or 1.4541 stainless steel, available in Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe with the ability to meet profiling requirements and distribute globally from our CN facility. 

Type 321 is a standard austenitic 18/8 chromium nickel alloy with the addition of Titanium making it an excellent choice in elevated temperature environments.

Used in particular applications within 450-850 degrees centigrade, 321 combines high strength with resistance to scaling and phase stability, Some typical areas of application are, furnace components, superheater and afterburner parts, compensators and expansion bellows.

The main properties are:

1. Basic corrosion resistance

2. Resistance against intergranular corrosion

3. Heat resistant alloy (medium temperature)

4. High ductility

Technical Information

Stainless steel 321 is an 18Cr-9Ni austenitic stainless steel stabilised with some titanium additions.

This kind of steel is one of the basic grades of the stainless steels range. Titanium bearing (carbide forming element) avoids intergranular corrosion, even on welded pieces without ulterior water quenching.

Alloys stainless steel 321 exhibit austenitic microstructures free of deleterious carbide precipitations but with CNTi precipitations at the grain boundaries. The grade contains some residual ferrite (≈4%) after solution annealing (1000-1100°C – 1832-2012°F) and water quenching.

CHEMICAL ANALYSISTypical values (weight %)CCrNIMoNOthers0.05017.59.2––=5x%C ; up to 0.70PREN (=%Cr+3.3%Mo+16%N) ≥ 18

MECHANICAL PROPERTIESTensile properties after water quenching°C°FMinimum guaranteed values *Typical valuesEl %Y.S. 0.2%Y.S. 1%UTSY.S. 0.2%Y.S. 1%UTSMPaKsiMPaKsiMPaKsiMPaKsiMPaKsiMPaKsi20682002924035500/ 70073/ 102280403104560089451002121762520830460672383426038550824020039215723186274106020029230334506635300572136201672439057168262103043564354007521251815623390571752520029420613050093211917149223104516824195283405030

* Following EN 10088 hot rolled plates. The EN guaranteed values are valid for a thickness from 5-75mm.Impact values°C-269-196+20°F-452-32068KCV (J*cm²) Minimum62100150KCV (J*cm²) Typical13816025

PHYSICAL PROPERTIESInterval temper °CThermal expansion αx10-6K-1°C°FResistivity (µΩ cm)Thermal conductivity (W.m-1.K-1)Specific heat (J.kg-1.K-1)Young modulus E (GPa)Shear modulus G (GPa)20-10016206873155002007720-20016.510021277165001947520-300172003928417.55201867120-40017.530057291195301796820-500184007529720.5540172655009321022254016562

CORRISION RESISTANCEQuality corrosion tests guaranteed (special request may be discussed)TESTOther nameCorrosion (1)ResultsASTM A 262 AIntergranularStep or dual structureASTM A 262 BSTREICHERIntergranularNot recommendedASTM A 262 CHUEYIntergranularNot recommendedASTM A 262 E DIN 50914 RCCMSTRAUSSIntergranularNo cracking after bendingASTM G48 APittingNot recommended (typical CPT = 5°C-41°F)ASTM G48 BASTM G78CreviceNot recommended (typical CCT ≤ 0°C-32°F)

APPLICATIONS

Stainless steel 321 is corrosion resistant in:

1. Urban media

2. Most of diluted organic acids at moderate temperatures

3. Most of food and pharmaceutical products

4. Pure phosphoricM
   

5. Whatever concentration in cold solution

6. Up to 10% diluted hot solution

7. Caustic solutions free of chlorides or fluorides at medium temperatures

The alloys is not corrosion resistant in chloride containing solutions, even diluted, and in sulphuric acid media.

So, the main applications are:

1. Food processing and storage

2. Chemical industry

3. High temperature