TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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ASTM A213 Seamless Ferritic and Austenitic Alloy Steel Boiler Superheater and Heat Exchanger Tubes
Applications: for Boilers,Superheaters,Heat-Exchangers
Size range: O.D.:6-168mm W.T.:1-15mm L: according to customer requirement
Manufacture:
Seamless process by Hot-Finish or Cold-Finish.
| Steel Grade and Chemical Compositions: | |||||||
| 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 and Inspection:
Tensile Requirement
Hardness Requirement
Flattening Test
Flaring Test
Hydrostatic or Nondestructive Electric Test ( Eddy Current Test and Ultrasonic Test)
Surface Condition:
Ferritic Alloy cold-finished steel tubes are free of scale and suitable for inspection
Ferritic alloy hot-finished steel tubes are freee of loose scale and suitbale for inspection.
Reference Documents:
ASTM A262 Practices for Detecting Susceptibility to Intergranular Attach In Austenitic Stainless Steels
ASTM A941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroallys
ASTM A1016/A 1016M Specification for General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes
E112 Test Methods for Determining Average Grain Size