Stainless Steel 321 321H I-Beam
Product Description
321/321H stainless steel I-beam is an austenitic stainless steel profile containing titanium stabilizing elements. Its cross section is "I" shaped. It has the characteristics of high temperature resistance (321≤850℃ / 321H≤900℃), intergranular corrosion resistance and high strength. It is widely used in energy and electricity, automobile manufacturing, petrochemical and other fields. It is suitable for high-temperature structures that do not require heat treatment after welding.
321H high-temperature I-section
321/321H Stainless Steel I-Beam Specifications
|
Standard |
ASTM A240 (UNS S32100/S32109), EN 1.4541 |
|
Specifications |
ASTM A 276/A 276M, A 484/A 484M, A 564/A 564M, A 582/A582M, A 638 /A 638M, A705/A705M |
|
Dimensions |
EN, DIN, JIS, ASTM, BS, ASME, AISI |
|
SS 321 / 347 Beam |
3″ thru 12.31″ |
|
Thickness |
3.0mm–120mm |
|
Length |
3MTR, 4MTR, 5MTR, 6MTR, or Custom Cut Sizes |
|
Type |
Angle, C Channel, U Channel, H Beam, I Beam, T Beam, W Beam, Chain |
|
Parameter |
321 Stainless Steel |
321H Stainless Steel |
|
Chemical Composition |
Cr 17-19%, Ni 9-12%, Ti ≥5×C%, C ≤0.08% |
Cr 17-19%, Ni 9-12%, Ti ≥5×C%, C 0.04-0.10% |
|
Chloride Resistance |
≤10,000 ppm (general corrosion) |
≤10,000 ppm (high-temperature applications) |
|
Max Service Temperature |
850°C (long-term) |
900°C (long-term) |
|
Mechanical Properties |
Tensile ≥520 MPa, Yield ≥205 MPa, Elongation ≥40% |
Tensile ≥520 MPa, Yield ≥205 MPa, Elo |
Boiler-grade 321H I-beam suppliers
FAQ
Q: What is the difference between 321 and 321H I-beams?
A: 321H has a higher carbon content (0.04-0.10%) and is resistant to high temperatures up to 900°C, making it suitable for extremely high temperature scenarios such as supercritical boilers.
Q: Can 321 I-beams be used for welded structures?
A: Yes, corrosion resistance can be maintained without heat treatment after welding, and ER321 welding wire is recommended.
Q: What is the maximum operating temperature of 321 I-beams?
A: 321 is ≤850°C for long-term use, and 321H is ≤900°C for long-term use.
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