321 Stainless Steel
Gnee Steel is the biggest stockists and suppliers of 321 stainless steel , available in plate, sheet,with the ability to meet profiling requirements and distribute globally from our facility in China.Type 321 is a standard austenitic 18/8 chromium nickel alloy with the addition of Titanium...
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Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of 321 stainless steel in China. With abundant experience, we warmly welcome you to wholesale customized 321 stainless steel from our factory. For price consultation, contact us.
Gnee Steel is the biggest stockists and suppliers of 321 stainless steel, available in plate, sheet,with the ability to meet profiling requirements and distribute globally from our facility in China.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, super-heater and afterburner parts, compensators and expansion bellows.
Stainless 321 is a heat resistant, titanium stabilized, austenitic alloy that’s commonly used for service in the 1000°-1600°F temperature range. 321 stainless is primarily used in applications that involve continuous and intermittent service temperatures within the carbide precipitation range of 800°-1500°F. Type 321 is similar to type 304 stainless but with a titanium addition of at least five times the carbon content.
DESCRIPTION
Type 321 is an austenitic chromium-nickel stainless steel containing Titanium which is recommended for parts fabricated by welding which cannot subsequently be annealed. Type 321 is a stabilized austenitic stainless steel similar to type 304 but with a titanium addition. This titanium addition reduces or prevents carbide precipitation during welding and in 800 - 1500 °F (427 - 816 °C) service. It also improves the elevated temperature properties of the alloy. Type 321 provides excellent resistance to oxidation and corrosion and possesses good creep strength.
Composition
Typical compositional ranges for grade 321 stainless sheets of steel are given in table 1.
Table 1. Composition ranges for 321-grade stainless steel
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Other | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 321 | min. max |
- 0.08 |
2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
- | 9.0 12.0 |
0.10 | Ti=5(C+N) 0.70 |
| 321H | min. max |
0.04 0.10 |
2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
- | 9.0 12.0 |
- | Ti=4(C+N) 0.70 |
| 347 | min. max |
0.08 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0 19.0 |
- | 9.0 13.0 |
- | Nb=10(C+N) 1.0 |
Mechanical Properties
Typical mechanical properties for grade 321 stainless sheets of steel are given in table 2.
Table 2. Mechanical properties of 321-grade stainless steel
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50 mm) min | Hardness | |
|---|---|---|---|---|---|
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321 | 515 | 205 | 40 | 95 | 217 |
| 321H | 515 | 205 | 40 | 95 | 217 |
| 347 | 515 | 205 | 40 | 92 | 201 |
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