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Credibility ,Yaang 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:
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.
Typical values (weight %) | |||||
---|---|---|---|---|---|
C | Cr | NI | Mo | N | Others |
0.050 | 17.5 | 9.2 | - | - | =5x%C ; up to 0.70 |
PREN (=%Cr+3.3%Mo+16%N) ≥ 18 |
Tensile properties after water quenching | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
°C | °F | Minimum guaranteed values * | Typical values | El % | ||||||||||
Y.S. 0.2% | Y.S. 1% | UTS | Y.S. 0.2% | Y.S. 1% | UTS | |||||||||
MPa | Ksi | MPa | Ksi | MPa | Ksi | MPa | Ksi | MPa | Ksi | MPa | Ksi | |||
20 | 68 | 200 | 29 | 240 | 35 | 500/ 700 |
73/ 102 |
280 | 40 | 310 | 45 | 600 | 89 | 45 |
100 | 212 | 176 | 25 | 208 | 30 | 460 | 67 | 238 | 34 | 260 | 38 | 550 | 82 | 40 |
200 | 392 | 157 | 23 | 186 | 27 | 410 | 60 | 200 | 29 | 230 | 33 | 450 | 66 | 35 |
300 | 572 | 136 | 20 | 167 | 24 | 390 | 57 | 168 | 26 | 210 | 30 | 435 | 64 | 35 |
400 | 752 | 125 | 18 | 156 | 23 | 390 | 57 | 175 | 25 | 200 | 29 | 420 | 61 | 30 |
500 | 932 | 119 | 17 | 149 | 22 | 310 | 45 | 168 | 24 | 195 | 28 | 340 | 50 | 30 |
* 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 | -320 | 68 |
KCV (J*cm²) Minimum | 62 | 100 | 150 |
KCV (J*cm²) Typical | 138 | 160 | 25 |
Interval temper °C |
Thermal expansion αx10-6K-1 |
°C | °F | Resistivity (µΩ cm) |
Thermal conductivity (W.m-1.K-1) |
Specific heat (J.kg-1.K-1) |
Young modulus E (GPa) |
Shear modulus G (GPa) |
---|---|---|---|---|---|---|---|---|
20-100 | 16 | 20 | 68 | 73 | 15 | 500 | 200 | 77 |
20-200 | 16.5 | 100 | 212 | 77 | 16 | 500 | 194 | 75 |
20-300 | 17 | 200 | 392 | 84 | 17.5 | 520 | 186 | 71 |
20-400 | 17.5 | 300 | 572 | 91 | 19 | 530 | 179 | 68 |
20-500 | 18 | 400 | 752 | 97 | 20.5 | 540 | 172 | 65 |
500 | 932 | 102 | 22 | 540 | 165 | 62 |
Quality corrosion tests guaranteed (special request may be discussed) | |||
---|---|---|---|
TEST | Other name | Corrosion (1) | Results |
ASTM A 262 A | Intergranular | Step or dual structure | |
ASTM A 262 B | STREICHER | Intergranular | Not recommended |
ASTM A 262 C | HUEY | Intergranular | Not recommended |
ASTM A 262 E DIN 50914 RCCM |
STRAUSS | Intergranular | No cracking after bending |
ASTM G48 A | Pitting | Not recommended (typical CPT = 5°C-41°F) |
|
ASTM G48 B | ASTM G78 | Crevice | Not recommended (typical CCT ≤ 0°C-32°F) |
Stainless steel 321 is corrosion resistant in:
The alloys is not corrosion resistant in chloride containing solutions, even diluted, and in sulphuric acid media.
So, the main applications are:
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Yaang Pipe Industry Co., Ltd. is an international supplier of piping solutions for flange, butt welding fittings, socket welding fittings and threaded fittings. Our products are widely used in different industrial fields, including oil and gas, chemical industry, petrochemical industry, power plant, pulp and paper industry, environmental and water conservancy engineering, engineering projects, etc.