GOST 10498 08X18H10T AISI 321 Thin Wall Stainless Steel Tube For Corrosion Resistant
GOST 10498 06X18H10T 09X18H10T 08X18H10T Thin Wall Stainless Steel Tube For Corrosion-Resistant
Material
The thin wall stainless steel tubes under GOST 10498 standard comprise primarily of three stainless steel grades: 06X18H10T, 09X18H10T, and 08X18H10T. These materials are austenitic stainless steels known for their excellent corrosion resistance, good mechanical properties, and weldability. They are widely used in the manufacture of thin-walled tubes that require high resistance to oxidizing and reducing media, commonly employed in chemical, food, and pharmaceutical industries.
Specification
- Standard: GOST 10498
- Grades: 06X18H10T, 09X18H10T, 08X18H10T
- Type: Thin-walled seamless stainless steel tubes
- Wall Thickness: Thin wall, optimized for corrosion resistance and lightweight applications
- Surface: Pickled, bright annealed or as specified
- Manufacturing Process: Hot or cold-rolled tubes meeting dimensional accuracy and surface finish requirements
- Length: As per customer requirement or standard lengths (typically 4 - 6 meters)
Key Features
- High corrosion resistance especially against oxidizing media
- Good mechanical strength and toughness
- Excellent weldability and formability
- Thin wall design reduces weight while maintaining strength
- Heat-treatable for enhanced performance (especially grade 06X18H10T)
- Resistant to high temperatures and pressure environments
Chemical Composition
| Element | 06X18H10T (%) | 09X18H10T (%) | 08X18H10T (%) |
|---|---|---|---|
| Carbon (C) | 0.06 max | 0.09 max | 0.08 max |
| Silicon (Si) | 0.8 max | 0.8 max | 0.8 max |
| Manganese (Mn) | 2.0 max | 2.0 max | 2.0 max |
| Phosphorus (P) | 0.035 max | 0.035 max | 0.035 max |
| Sulfur (S) | 0.03 max | 0.03 max | 0.03 max |
| Chromium (Cr) | 17.5 - 19.5 | 17.0 - 19.0 | 17.0 - 19.0 |
| Nickel (Ni) | 9.0 - 11.0 | 8.0 - 10.5 | 8.0 - 10.5 |
| Titanium (Ti) | 0.5 - 0.7 | - | - |
| Nitrogen (N) | - | - | - |
Note: The 06X18H10T contains Titanium for stabilization, enhancing resistance against intergranular corrosion.
Mechanical Properties
| Property | 06X18H10T | 09X18H10T | 08X18H10T |
|---|---|---|---|
| Tensile Strength (MPa) | 520 - 700 | 520 - 700 | 520 - 700 |
| Yield Strength (MPa) | ≥ 205 | ≥ 205 | ≥ 205 |
| Elongation (%) | ≥ 40 | ≥ 40 | ≥ 40 |
| Hardness (HB) | ≤ 200 | ≤ 200 | ≤ 200 |
| Impact Toughness (KV) | ≥ 35 J at 20°C | ≥ 35 J at 20°C | ≥ 35 J at 20°C |
Steel Grade
- 06X18H10T: Austenitic stainless steel stabilized with titanium. Equivalent to AISI 321.
- 09X18H10T: Austenitic stainless steel, similar to AISI 304.
- 08X18H10T: Austenitic stainless steel, close to AISI 304 with minor variation in carbon content.
Application
- Chemical processing equipment
- Food and beverage industry pipelines and equipment
- Pharmaceutical industry tubing where high purity and corrosion resistance are required
- Heat exchangers and condensers
- Oil and gas industry components exposed to corrosive environments
- Aerospace and automotive sectors needing lightweight corrosion-resistant tubing
Equivalent Grades
| GOST Grade | AISI/ASTM Equivalent | EN Standard Equivalent |
|---|---|---|
| 06X18H10T | AISI 321 | EN 1.4541 |
| 09X18H10T | AISI 304 | EN 1.4301 |
| 08X18H10T | AISI 304L (similar) | EN 1.4306 (close grade) |
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