Torich International Co.,Ltd is specialized in manufacturing Alloy Steel Grade T5 T9 T11 T12 T22, according to technical standard of SA213, Standard Specificiation for Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater, and Heat Exchanger Tubes.
Covers 2 Points of Wall Thickness Tolerace:
1. Minimum wall thickness
2. Average wall thickness
Pls specify in the enquiry detail.
China Seamless Alloy Steel Tubes manufacturer, choose the high quality Seamless Alloy Steel Pipe, Precision Engineering Pipe, Ferritic Alloy Steel Pipe, Nickel Alloy Steel Tube
The Tubing sizes an thickness covers:
OD: 1/8'' (3.2mm) to 5'' (127mm)
WT: 0.015'' to 0.500'' (0.4 to 12.7mm)
Alloy Steel Pipe Heat-Exchanger Tubes SA213 Steel Grades Chemical Composition and Mechanical Properties:
| Steel Grade | C | Mn | P | S | Si | Cr | Mo |
| | max | max | max | max | max | min | |
| T5 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.5 | 4.0-6.0 | 0.45-0.65 |
| T9 | 0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.0-10.0 | 0.90-1.10 |
| T11 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.0-1.50 | 0.44-0.65 |
| T12 | 0.05-0.15 | 0.30-0.61 | 0.025 | 0.025 | 0.50 | 0.80-1.25 | 0.44-0.65 |
| T21 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 2.65-3.35 | 0.80-1.06 |
| T22 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 | 1.90-2.60 | 0.87-1.13 |
| Steel Grade | Tensile Strength | Yield Strength | Elongation | Hardness.Max | | |
| min.ksi [Mpa] | min.ksi [Mpa] | % | Brinell/Vickers | Rockwell | | | |
| T5b | 60[415] | 30[205] | 30 | 179HBW/190HV | 89HRB | | |
| T9 | 60[415] | 30[205] | 30 | 179HBW/190HV | 89HRB | | |
| T12 | 60[415] | 32[220] | 30 | 163HBW/170HV | 85HRB | | |
| T91 | 85[585] | 60[415] | 20 | 250HBW/265HV | 25HRC | | |
| T92 | 90[620] | 64[440] | 20 | 250HBW/265HV | 25HRC | | |
Mechanical Properties:
Tensile Strength
Yield Strength
Elongation
Mechanical property requirements do not apply to tubing smaller than 1/8'' (3.2mm) in inside diameter or thinner than 0.015'' (0.4mm) in thickness
Hardness Requirements:
Brinell, Vickers or Rockwell hardness tests shall be made on specimens frrom each lot.
Flattening Test:
One flattening test shall be made on specimens from each end of one finished tube, not the one used for flaring test, from each lot.
Flaring Test:
One flaring test shall be made on specimens from each end of one finished tube, not the one used for flattening test, from each lot
Surface Condition:
Ferritic alloy cold-finished steel tubes shall be free of scale and suitable for inspection. A slight amount of oxidation is not considered scacel.
Ferritic alloy hot-finished steel tubes shall be free of loose scale and suitable for inspection
Stainless Steel Tubes shall be pickled free of scale. When bright annealing is used, pickling is not necessary.
Any special finish requirement shall be subject to agreement between the customer and our production teams.
Packing and Container Loading for Alloy Steel Pipe:    
Referenced Documents: ASTM A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels ASTM A941 Terminology Relacting to Steel, Stainless Steel, Related Alloys and Ferroalloys ASTM A1016/A1016M Specificiation for General Requirements for Feeritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes ASTM E112 Test Method for Determining Average Grain Size
Keywords: alloy steel tubes, austentic stainless steel, boiler tubes, ferritic stainless steel, heat exchanger tubes, high-temperature applications,seamlss steel tubes, steel tubes, superheater tubes, temperature service application-high |
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