ASTM A213 TP312H Stainless Steel Seamless Tube Bright Annealed Surface for Heat Exchanger
ASTM A213 TP312H Stainless Steel Seamless Tube Bright Annealed Surface for Heat Exchanger
YUHONG GROUP is a specialized manufacturer of high-performance stainless steel tubes for critical heat transfer applications. With over two decades of expertise in precision tube manufacturing, our ASTM A213 TP312H Stainless Steel Seamless Tubes, with a Bright Annealed surface, deliver exceptional corrosion resistance and heat transfer efficiency in demanding heat exchanger systems.
Chemical Composition of TP321H (UNS S32109)
| Element | Requirement (%) | Notes |
| Carbon (C) | 0.04–0.10 | Controlled carbon range for high-temperature stability |
| Manganese (Mn) | 2.00 max | |
| Phosphorus (P) | 0.045 max | |
| Sulfur (S) | 0.030 max | |
| Silicon (Si) | 1.00 max | |
| Chromium (Cr) | 17.0–19.0 | Provides oxidation resistance |
| Nickel (Ni) | 9.0–12.0 | Austenite stabilizer |
| Titanium (Ti) | 4(C+N)–0.70 min | Stabilization against sensitization |
Heat Treatment Specifications for TP321H (UNS S32109)
| Parameter | Requirement | Notes |
| Grade | TP321H | Titanium-stabilized austenitic stainless steel |
| UNS Number | S32109 | |
| Heat Treat Type | Solution treatment | |
| Solution Treating Temperature | 2000°F [1090°C] | Higher than standard TP321 (1900°F/1040°C) |
| Cooling Media | Water or other rapid cooling | Prevents carbide precipitation |
Mechanical Properties of TP321H (UNS S32109)
| Property | Requirement | Notes |
| Grade | TP321H | Titanium-stabilized austenitic stainless steel |
| UNS Designation | S32109 | |
| Tensile Strength, min | 75 ksi [515 MPa] | Matches standard TP321 requirements |
| Yield Strength, min | 30 ksi [205 MPa] | 0.2% offset method |
| Elongation in 2 in. or 50 mm, min | 35% | Standard elongation for austenitic grades |
| Hardness, max | 192 HBW/200 HV | Brinell/Vickers hardness |
| Hardness, max | 90 HRB | Rockwell B scale |
ASTM A213 TP312H Stainless Steel Seamless Tube - Application Advantages
1. Superior Corrosion Resistance for Demanding Environments
High alloy content provides exceptional resistance to pitting and crevice corrosion
PREN ≥ 40 ensures reliable performance in chloride-containing media
2. Excellent Heat Transfer Efficiency
Bright Annealed surface minimizes fouling and maintains optimal heat transfer coefficients
Seamless construction allows uniform wall thickness for consistent thermal performance
3. High Temperature Capability
Maximum service temperature 1100°C, suitable for various heat exchanger applications
Maintains mechanical properties under thermal cycling conditions
4. Long Service Life and Reliability
Superior oxidation resistance reduces maintenance requirements and downtime
Proven performance in chemical processing and power generation applications
5. Easy Maintenance and Cleaning
Smooth BA surface prevents scale buildup and facilitates cleaning
Non-contaminating surface ensures product purity in pharmaceutical and food applications
6. Cost-Effective Solution
Extended service life reduces replacement frequency and total cost of ownership
Reduced fouling maintains heat transfer efficiency, saving energy costs
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