How to produce stainless steel pipes | High quality stainless steel pipe production | Stainless steel pipes
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12X18H9, 12X18H10T, 12X18H12T, 17X18H9, 08X22H6T Seamless Stainless Steel Pipes for Chemical Industry
Material and Specification
These grades of seamless stainless steel pipes—12X18H9, 12X18H10T, 12X18H12T, 17X18H9, and 08X22H6T—are based on Russian GOST and TU standards. Designed for high resistance to corrosion in chemically aggressive environments, they are widely used in pipelines, reactors, heat exchangers, and instrumentation within the chemical, petrochemical, and pharmaceutical industries.
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Standards: GOST 9940-81, GOST 9941-81, TU 14-3-1128-2000
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Manufacturing Process: Hot or cold-deformed seamless pipes
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Delivery Condition: Annealed (softened), pickled, solution-treated
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Outer Diameter Range: 6 mm to 273 mm
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Wall Thickness Range: 0.5 mm to 20 mm
Key Features
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Excellent corrosion resistance in oxidizing and reducing environments
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High resistance to intergranular corrosion, especially with Ti-stabilized grades
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Suitable for elevated temperatures up to 600–800°C (depending on grade)
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Good weldability and formability
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Long service life in aggressive chemical media
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High purity, low carbon and controlled alloying elements
Chemical Composition
| Steel Grade | C | Si | Mn | Cr | Ni | Ti | Mo | Other Elements |
|---|---|---|---|---|---|---|---|---|
| 12X18H9 | ≤0.12 | ≤0.8 | ≤2.0 | 17.0–19.0 | 8.0–10.0 | — | — | — |
| 12X18H10T | ≤0.12 | ≤0.8 | ≤2.0 | 17.0–19.0 | 9.0–11.0 | 0.4–0.7 | — | — |
| 12X18H12T | ≤0.12 | ≤0.8 | ≤2.0 | 17.0–19.5 | 10.0–13.0 | 0.4–0.7 | — | — |
| 17X18H9 | ≤0.17 | ≤0.8 | ≤2.0 | 17.0–19.0 | 8.0–10.0 | — | — | — |
| 08X22H6T | ≤0.08 | ≤0.8 | ≤2.0 | 21.0–23.0 | 5.5–7.0 | 0.3–0.7 | — | S ≤ 0.02, P ≤ 0.035 |
Mechanical Properties
| Steel Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Toughness (J/cm²) | Hardness (HB) |
|---|---|---|---|---|---|
| 12X18H9 | ≥520 | ≥210 | ≥40 | ≥80 | ≤187 |
| 12X18H10T | ≥540 | ≥220 | ≥40 | ≥90 | ≤187 |
| 12X18H12T | ≥550 | ≥230 | ≥40 | ≥100 | ≤187 |
| 17X18H9 | ≥500 | ≥200 | ≥35 | ≥70 | ≤187 |
| 08X22H6T | ≥550 | ≥220 | ≥40 | ≥90 | ≤187 |
Note: Mechanical properties may vary slightly depending on manufacturing method and heat treatment.
Steel Grade Overview
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12X18H9: Equivalent to AISI 304, a general-purpose austenitic stainless steel.
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12X18H10T: Titanium-stabilized version of 304 for improved intergranular corrosion resistance.
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12X18H12T: Higher nickel and Cr content, Ti-stabilized; suitable for more aggressive conditions.
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17X18H9: Slightly higher carbon variant; good high-temperature strength.
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08X22H6T: High Cr, low Ni, Ti-stabilized; designed for strong resistance to oxidizing acids and chloride media.
Applications
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Chemical reactors, pressure vessels, and distillation towers
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Acid and alkali piping systems
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Heat exchangers in the chemical and petrochemical industries
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Pharmaceutical equipment and food processing pipelines
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Nuclear and thermal power station components
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High-temperature structural components in aggressive environments
Possible Alternative Grades
| Russian Grade | Possible Equivalent Standards |
|---|---|
| 12X18H9 | AISI 304 / EN 1.4301 / SUS 304 |
| 12X18H10T | AISI 321 / EN 1.4541 / SUS 321 |
| 12X18H12T | AISI 316Ti / EN 1.4571 / SUS 316Ti |
| 17X18H9 | Similar to EN 1.4307 / AISI 304L |
| 08X22H6T | Comparable to EN 1.4521 / AISI 444 |
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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