ASTM A334 GR.6 Tubes – High-Performance Corrosion Resistance
1.Product Overview
ASTM A334 GR.6 (UNS N10276) tubes are made from Hastelloy C-276, a nickel-chromium-molybdenum alloy engineered for exceptional
resistance to harsh environments, including oxidizing and reducing
acids, chlorides, and seawater. Ideal for chemical processing,
pollution control, and offshore applications.
2. Chemical Composition (ASTM B334 GR.6)
| Element | Composition (% Weight) |
|---|
| Nickel (Ni) | Balance (≥52%) | | Chromium (Cr) | 14.5–16.5 | | Molybdenum (Mo) | 15.0–17.0 | | Iron (Fe) | 4.0–7.0 | | Tungsten (W) | 3.0–4.5 | | Cobalt (Co) | ≤2.5 | | Manganese (Mn) | ≤1.0 | | Silicon (Si) | ≤0.08 | | Carbon (C) | ≤0.02 | | Sulfur (S) | ≤0.01 |
3. Equivalent Grades
| Property | Value (Room Temperature) |
|---|
| Tensile Strength | ≥690 MPa (100 ksi) | | Yield Strength (0.2% Offset) | ≥283 MPa (41 ksi) | | Elongation | ≥40% | | Hardness (Rockwell B) | ≤100 HRB |
4. Key Advantages- Superior Corrosion Resistance: Resists pitting, crevice corrosion, and stress corrosion cracking
(SCC) in chloride-rich environments.
- High-Temperature Stability: Maintains strength up to 400°C (752°F).
- Weldability: Compatible with GTAW, GMAW, and SMAW processes without post-weld
heat treatment.
- Versatility: Suitable for both oxidizing (e.g., HNO₃) and reducing (e.g., HCl)
media.
5. Applications of ASTM A334 GR.6 Tubes- Chemical Processing: Reactors, heat exchangers, and piping for sulfuric, hydrochloric,
and acetic acid.
- Pollution Control: Flue gas desulfurization (FGD) systems and scrubbers.
- Oil & Gas: Offshore platforms, seawater cooling systems, and sour gas
pipelines.
- Pharmaceutical: Equipment handling aggressive solvents.
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