China ASTM A249 Stainless Steel Tube

Raw material from POSCO
Stainless steel tube for heat exchanger
Specifications:
1) Diameters: 4 - 76.2mm
2) W. T.: 0.4 - 2.5mm
3) Grades: 316L/304/ 304L/310S, etc.
4) Standard: GB/ISO/EN/ASTM/JIS, etc.
5) Application range: Widely use in the foodstuff, medical equipment, power, boiler, cooler, auto, condenser etc.
6) Packing: Inner packing: 1 PC/plastic bag; Outer packing: Bundles in weaving bags or in plywooden case.

Outside path in class deviation mm table 3 Outside path inIIclass deviation mm table 4Outside pathAdmission deviation<25±0.10≥25~38.1±0.15>38.1~50±0.20≥50~63.50.25>63.5~76±0.30≥76~102±0.40 Outside pathAdmission deviation≤10±0.15>10~32±0.20>32~50±0.30>50±0.8%

The thick the deviation of admission( do not include the weld sew) in wall of the weld tube is for ruling the wall thick 10% of ±, but minimum admission deviation is the 0.02 mms of ±.
The weld takes care of of settle Chinese foot length as 3 ms~9 ms, general settle the Chinese foot with the 6 ms.
The weld takes care of of settle the Chinese foot length in usually length, its the deviation of admission is the 5 mms of ±.
Adopt partial the degree of flinch in a the tube of weldfor keeping the Chinese foot measurement should not very in 2.0 mms.
The machine function sees the table 5
table 5

Steel numberCard numberThe heat handles
Make degree
The anti- pulls the strength
MPaAccept defeat the strength
MPaExtension rate%Degree of hardnessHRB0Cr19N19304≥1010°C
Nasty and cold≥520≥20540≤9000Cr19Ni11304L" "≥480≥17540≤900Cr17Ni12M02316" "≥520≥20540≤90