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Tel: +86-571-28350111
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Add: Floor 10, Xixi Vally E-Building, Xihu District, Hangzhou, Zhejiang province, China
321and 321H Stainless Steel

321and 321H Stainless Steel

321/321H Stainless Steel Type 321 is basic type 304 modified by adding titanium in an amount at least 5 times the carbon plus nitrogen contents. These titanium bearing stainless steels are stabilized against carbide precipitation and designed for eperation within the damaging temperature range...

321/321H Stainless Steel

Type 321 is basic type 304 modified by adding titanium in an amount at least 5 times the carbon plus nitrogen contents.

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.

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Specifications -321/321H Stainless Steel

· ASTM:A312, A403, A182

· ASME: SA312, SA403, SA182

Chemical Composition - 321/321H Stainless steel

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Grade

321

321H

UNS Designation

S210000

S32109

Carbon (C) Max.

0.08

0.04 – 0.10

Manganese (Mn) Max.

2.00

2.00

Phosphorous (P) Max.

0.040

0.040

Sulphur (S) Max.

0.030

0.030

Silicon (Si) Max.

0.75

0.75

Chromium (Cr)

17.0 – 20.0

17.0 – 20..0

Nickel (Ni)

9.0 – 12.0

9.0 – 12.0

Molybdenum (Mo)

Nitrogen (N)

0.1 Max.

0.1 Max.

Iron (Fe)

Bal.

Bal.

Other Elements

Ti=5(C) to 0.70%

Ti=5(C) to 0.60%

*The titanium content shall not be less than 5 times the carbon content and not more than 0.60%.  321H requires the titanium content to be not less than 4 times the carbon content and not more than 0.60%.

Typical Mechanical Properties

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Material

Tensile Strength Rm, N/mm²

Yield Strength Rp 0.2, N/mm²

% Elongation

Alloy 321 Tube

500-730

200

35

Design Features - 321/321H 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.

Typical Applications - 321/321H Stainless Steel

· High temperature chemical process heat exchanger tubes

· Refineries

· High temperature steam service

Tensile Requirements - 321/321H Stainless Steel

· Tensile Strength (KSI): 75

· Yield Strength (KSI): 30

Tech & Grade图片11.png for Stainless steel

Stainless steel is one of the more standardized materials in the building and engineering industries.

· History of stainless steel

· Types of stainless steel

· Standard for stainless products

· ANSI Standards Stainless Steel

· ANSI Stainless Pipe Chart

· 304/304L Stainless Steel

· 316/316L Stainless Steel

· 310S Stainless Steel

· 317L Stainless Steel

· 321/321H Stainless Steel

· 410 Stainless Steel

· Duplex 2205 (UNS S31803)

· ASTM A511 Standard Specification

· Packing stainless pipes

· Reasonable selection of stainless steel

· The main elements in stainless steel

· China number VS. International

· Carbon steel fittings VS. stainless fittings

· Usage of thin-walled galvanized stainless tube

· Stainless welding technical requirements and...

· Stainless seamless pipe crack detection

· Stainless steel flexible multiple tube

· Stainless pipe solution treatment effect

· Stainless Steel Tube Bright Annealing

· Stainless steel number comparision

· Stainless Steel Heat Exchangers

Hot Tags: 321and 321H stainless steel, China, manufacturers, suppliers, factory, wholesale
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    Fax: +86-571-86693517
    Email: sales@matech-steel.com
    Add: Floor 10, Xixi Vally E-Building, Xihu District, Hangzhou, Zhejiang province, China
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