ASME SA213 SUPER 304H SEAMLESS STEEL TUBES
SA213 S30432 (super 304H) steel is a new type of 18-8 austenitic stainless steel, which is mainly used to manufacture superheater and reheater of ultra supercritical boiler with metal wall temperature not exceeding 700 ºC.
SA213 S30432 (super 304H) steel reduces Mn content on the basis of TP304H, adds 3% Cu, 0.45% Nb and a certain amount of N, which makes the steel produce dispersion precipitation phase and copper rich strengthening phase in service, and copper rich phase together with NBC (n), nbcrn and M23C6 produces excellent precipitation strengthening effect, which greatly improves the allowable stress under service temperature. The allowable stress at 600-650 ºC is 30% higher than that of TP347H steel. Compared with tp347hfg steel, the steam oxidation resistance of this steel is better than that of tp321h steel. It has been listed in ASME code 2328-1, ASTM A213 and GB 5310-2008 standards, and its grades are S30432 and 10cr18ni9nbcu3bn respectively
ASME SA213 S30432 (Super 304H) Seamless Steel Tubes Quick Details
Manufacture:Seamless process
Outer Diameter:10~610mm
Thickness:1~30mm
Length: 6M or specified length as required.
Ends: Plain End, Beveled End, Treaded
Additional Info
Surface: Tubes will be varnished (Outside only) to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Bundles (hexagonal),Wooden Boxes,Crates (steel/wooden) or as required
Chemical composition (%) of SA213 S30432 (Super 304H)
| Grade |
C |
Mn |
P |
S |
Si |
Cr |
| SA213 S30432 (Super 304H) |
0.07-0.13 |
≤1.00 |
≤0.040 |
≤0.010 |
≤0.30 |
17.0-19.0 |
| Ni |
N |
Nb |
Al |
B |
Cu |
| 7.5-10.5 |
0.05-0.12 |
0.30-0.60 |
0.003-0.030 |
0.001-0.010 |
2.50-3.50 |
Mechanical property of SA213 S30432 (Super 304H)
| Grade |
Tensile strength(Mpa) |
Yield strength(Mpa) |
Elongation(%) |
Hardness |
| SA213 S30432 (Super 304H) |
≥590 |
≥235 |
≥35 |
≤95HRB |
Heat treatment and grain size requirements of SA213 S30432 (Super 304H)
| Grade |
Type of heat treatment |
Austenite / solution treatment temperature, ºC |
Cooling medium |
ASTM grain size class number |
| SA213 S30432 (Super 304H) |
Solution treatment |
≥1100 |
Water cooling or rapid cooling |
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Selection of SA213 S30432 (super 304H) welding material
SA213 S30432 (super 304H) steel has low carbon content and good weldability. The hot cracking sensitivity test showed that SA213 S30432 (super 304H) had lower hot cracking sensitivity than TP347H. Gas tungsten arc welding (GTAW) or SMAW can be used; the welding materials matching SA213 S30432 (super 304H) have also been developed, namely T-304h and 304H,
Related knowledge of SA213 S30432 (super 304H) steel pipe
Due to the high steam parameters of the ultra supercritical unit, the power plant and users pay great attention to the oxidation resistance of the steel for high temperature pressure parts. The purpose of shot peening on the inner wall of SA213 S30432 (super 304H) steel pipe is to further improve its oxidation resistance. However, at home and abroad, there is no unified understanding of shot blasting treatment of SA213 S30432 (super 304H) steel pipe inner wall.
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