Overview
A213 is often called chrome moly tube because of the chemical makeup of Molybdenum (Mo) and Chromium (Cr). Molybdenum increases the strength of steel as well as the elastic limit, resistance to wear, impact qualities, and hardenability. Moly increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement. Moly is the most effective single additive that increases high temperature creep strength. It also enhances the corrosion resistance of steel, and inhibits pitting. Chromium (or chrome) is the essential constituent of stainless steel. Any steel with 12% or more Chrome is considered stainless. Chrome is virtually irreplaceable in resisting oxidation at elevated temperatures. Chrome raises the tensile, yield, and hardness at room temperatures.
A213/SA213 T9 is a Seamless ferritic low alloy steel boiler tube used in super heater elements, and heat exchangers. The UNS Designation is K90941. A213/SA213 T9 steel can be purchased HF (hot finished) or CD (cold drawn) and shall be killed. It has a maximum hardness of 89 HRB (Rockwell B) and is a P5B Material. Grade T9 also has a number of excellent features to provide like Great strength, Corrosion resistant, Unique quality and more. Obtainable in different shapes and sizes.
Specification
ASTM A213/A213M-21a Standard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes.
Specifications | ASTM A213 |
Grade | T5, T9, T11, T22, T91 |
Size | 1/8"NB TO 30"NB IN |
Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, X |
Type | Seamless - Hot Rolled / Cold Drawn |
Length | Single Random, Double Random & Cut Length |
Form | Round, Square, Rectangular, Hydraulic Etc |
End | Plain End, Beveled End, Treaded |
Chemical Composition
C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % |
0.15 max | 0.30-0.60 | 0.025 max | 0.025 max | 0.25-1.00 | 8.0-10.0 | 0.90-1.10 |
Mechanical Properties
Tensile Strength, MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
415 min | 205 min | 30 min | 179 max |
Tolerance
Outside Diameter | OD Tolerance | WT Tolerance | Ovality Tolerance | Cut Length Tolerance |
OD≤ 12, 7 mm | ± 0, 13 mm | ± 15 % | – | + 3, 18 mm, – 0 mm |
12, 7 mm < OD ≤ 38, 1 mm | ± 0, 13 mm | ± 10 % | max, 1, 65 mm | + 3, 18 mm, – 0 mm |
38, 1 mm < OD ≤ 88, 9 mm | ± 0, 25 mm | ± 10 % | max, 2, 41 mm | + 4, 76 mm, – 0 mm |
Applications
1. Gas Processing Industries
2. Petrochemical Industries
3. Power Generation Industries
4. Chemical Industries
5. Oil & Gas Industries
6. Fertilizers Industries
