ASTM A213 T9 / UNS K90941 Seamless Steel Tubes for Boiler Superheater and Heat-Exchanger
Price:
Negotiable
MOQ:
10PCS
Delivery Time:
Depends on quantity
Brand:
YUHONG
Product Description
ASTM A213 T9 / UNS K90941 Seamless Steel Tubes
High-performance seamless alloy steel tubes engineered for boiler superheaters and heat-exchangers in demanding high-temperature applications.
Product Introduction & Core Specifications
ASTM A213 T9 is a seamless alloy steel tube specifically engineered for high-temperature service in boilers, superheaters, and heat exchangers. This ferritic alloy steel offers superior creep strength and oxidation resistance under prolonged exposure to heat and pressure.
Conforming to the latest ASTM A213/A213M-24 standard, these tubes cover a size range from 1/8 inch (3.2 mm) to 5 inches (127 mm) outside diameter, with wall thicknesses from 0.015 to 0.500 inches (0.4 to 12.7 mm). The seamless construction ensures uniform strength and enhanced safety in critical pressure applications.
Material & Key Characteristics
ASTM A213 T9 is a chromium-molybdenum alloy steel (9Cr-1Mo type) that delivers exceptional performance in high-temperature environments:
- High-Temperature Strength: Excellent resistance to deformation (creep) under stress at elevated temperatures
- Good Oxidation Resistance: Chromium content forms a stable oxide layer protecting against scaling in steam and flue gas environments
- Thermal Stability: Maintains mechanical properties during long-term operation in high-heat conditions
These tubes are supplied in a heat-treated condition, typically involving normalizing and tempering processes to achieve optimal properties.
Chemical Composition & Mechanical Properties
The performance of T9 tubes is ensured through tightly controlled chemical composition and guaranteed mechanical properties.
Chemical Composition (Weight %):
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 |
| Manganese (Mn) | 0.30 - 0.60 |
| Phosphorus (P) | 0.025 |
| Sulfur (S) | 0.025 |
| Silicon (Si) | 0.25 - 1.00 |
| Chromium (Cr) | 8.00 - 10.00 |
| Molybdenum (Mo) | 0.90 - 1.10 |
Typical Mechanical Properties:
| Property | Requirement |
|---|---|
| Tensile Strength | 415 MPa (60 ksi) |
| Yield Strength | 205 MPa (30 ksi) |
| Brinell Hardness | 179 HBW / 190 HV / 89 HRB |
| Elongation | 30% |
Key Applications
ASTM A213 T9 seamless tubes are primarily used in demanding high-temperature environments including:
- Power Generation Boilers: As superheater and reheater tubes where steam temperatures are extremely high
- Heat Recovery Steam Generators (HRSGs): In components exposed to high-temperature exhaust gases
- Petrochemical Industry: For heat exchanger tubing in cracking furnaces and other high-temperature process units
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Company
Yuhong Group Co.,Ltd
Location
20TH FLOOR,NO.1 NEW WORLD BUILDING ,NO.1018 MINAN ROAD,YINZHOU DISTRICT, NINGBO CITY, ZHEJIANG PROVINCE, CHINA
Contact Person
Jikin Cai