321 stainless steel strip is a Ni-Cr-Mo austenitic stainless steel material, its performance is very similar to 304 stainless steel strip.
But due to the addition of alloy titanium content, it has better resistance to grain boundary corrosion and high temperature strength. It effectively controls the formation of chromium carbide.
321 austenitic stainless steel strip has good corrosion resistance in the atmosphere and is widely used in petrochemical, electric power, bridge and automobile industries.
However, the “stainlessness” of 321 stainless steel is not absolute. Due to the special service environment, 321 stainless steel will also corrode.
Factors such as medium concentration, PH value, and temperature will have a greater impact on the corrosion resistance of 321 stainless steel.
321 stainless steel strip is applied to the field machines in the chemical, coal, and petroleum industries that require high resistance to grain boundary corrosion, heat-resistant parts for building materials and parts with difficult heat treatment.
1. Petroleum waste gas combustion pipeline
2. Engine exhaust pipe
3. Boiler shell, heat exchanger, heating furnace parts
4. Silencer parts for diesel engines
5. Boiler pressure vessel
6. Chemical transport truck
7. Expansion joint
8. Spiral welded pipes for furnace and dryers
The chemical components of grade 321 stainless steel strip is summarized in the following table:
Grade | Standard | C | Si | Mn | P | S | Cr | Ni | Mo |
321 | ASTM A240 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 17.00-19.00 | 9.00-12.00 | – |
Below The Table Is For Your Reference:
Grade | Standard | Yield Strength Rp0.2 (N/mm²) | Tensile Strength Rm (N/mm²) | Elongation % | Hardness (HV) | Hardness (HRB) |
---|---|---|---|---|---|---|
201 | ASTM A240 | ≥ 275 | ≥ 520 | ≥ 35 | ≤ 260 | ≤ 101 |
202 | ASTM A240 | ≥ 275 | ≥ 520 | ≥ 40 | ≤ 218 | ≤ 95 |
301 | ASTM A240 | ≥ 205 | ≥ 520 | ≥ 40 | ≤ 200 | ≤ 90 |
304 | ASTM A240 | ≥ 205 | ≥ 515 | ≥ 40 | ≤ 210 | ≤ 92 |
304L | ASTM A240 | ≥ 205 | ≥ 520 | ≥ 40 | ≤ 200 | ≤ 90 |
316L | ASTM A240 | ≥ 177 | ≥ 480 | ≥ 40 | ≤ 200 | ≤ 90 |
316Ti | ASTM A240 | ≥ 205 | ≥ 520 | ≥ 40 | ≤ 200 | ≤ 90 |
317L | ASTM A240 | ≥ 205 | ≥ 515 | ≥ 40 | ≤ 218 | ≤ 95 |
309S | ASTM A240 | ≥ 205 | ≥ 515 | ≥ 40 | ≤ 218 | ≤ 95 |
310S | ASTM A240 | ≥ 205 | ≥ 520 | ≥ 40 | ≤ 200 | ≤ 90 |
Below The Table Is For Your Reference:
Thickness Tolerance:
Thickness(mm) | Width<125mm | 125mm≤Width<250mm | 250mm≤Width<600mm |
---|---|---|---|
≥0.03-0.10 | ±0.06T | ±0.10T | ±0.10T |
≥0.10-0.15 | ±0.01 | ±0.015 | ±0.020 |
≥0.15-0.20 | ±0.015 | ±0.020 | ±0.025 |
≥0.20-0.25 | ±0.015 | ±0.020 | ±0.025 |
≥0.25-0.30 | ±0.018 | ±0.025 | ±0.030 |
≥0.30-0.40 | ±0.020 | ±0.025 | ±0.030 |
≥0.40-0.50 | ±0.025 | ±0.030 | ±0.040 |
≥0.50-0.60 | ±0.030 | ±0.030 | ±0.040 |
≥0.60-0.80 | ±0.030 | ±0.040 | ±0.040 |
≥0.80-1.00 | ±0.030 | ±0.040 | ±0.050 |
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