Place of Origin:
China
Brand Name:
YUHONG
Certification:
ISO 9001/TUV/PED
Model Number:
ASME SA334 GR.6
ASME SA334 GR.6 Carbon Steel,Low Temperature,Seamless Tube For Condenser Tube Bundle, Boiler, Heat Exchanger, Condenser, Superheater, HRSG
ASME SA334 Gr.6 seamless pipe is a type of carbon steel pipe used in cryogenic applications. Its main difference from other grades of the same standard is that it is nickel-free, resulting in lower costs, and it is suitable for temperatures above -45°C.
The material has excellent weldability and has undergone hydrostatic or non-destructive testing to ensure safety and reliability in the manufacture of heat exchange equipment or pressure pipelines.
It is used in almost all well-known LNG, polar oil and gas, and large-scale chemical projects.
| Chemical Composition | ||
| Element | Composition (%) | Note |
| Carbon (C) | ≤ 0.30 | |
| Manganese (Mn) | 0.29 - 1.06 | |
| Phosphorus (P) | ≤ 0.025 | |
| Sulfur (S) | ≤ 0.025 | |
| Silicon (Si) | 0.10 - 0.35 | |
| Copper (Cu) | ≥ 0.40 (min) | When specified as Copper-bearing steel |
| Aluminum (Al) | ≥ 0.02 (min) | For grain refinement, may be used in place of silicon killing |
| Mechanical & Technological Properties | ||
| Property | Requirement / Value | Note / Condition |
| Tensile Strength | ≥ 415 MPa (≥ 60,000 psi) | |
| Yield Strength | ≥ 240 MPa (≥ 35,000 psi) | |
| Elongation (in 2 in. or 50mm) | ≥ 35 % (min) | Minimum for wall thickness ≥ 0.07 in. (1.8 mm) |
| Heat Treatment | Normalized | Mandatory for achieving low-temperature properties. |
| Impact Test | Charpy V-Notch (CVN) Required | |
| Test Temperature | -50°F (-45°C) | |
| Minimum Impact Energy | Average of 3 specimens: ≥ 13.7 J (10 ft·lbf) | |
| Single specimen: ≥ 11.4 J (8.4 ft·lbf) | ||
| Hardness | As per applicable code limits | Typically specified in the purchase agreement or governing design code. |
| Manufacturing Process | Primarily Seamless | Welded tube is permitted by the specification but less common for this grade. |
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