Super Austenitic stainless steel

S30432 ASTM A213 Seamless Austenitic Alloy-Steel Boiler, Super 304H Superheater, Heat-Exchanger Tubes

S30432 ASTM A213 Seamless Austenitic Alloy-Steel Boiler, Super 304H Superheater, Heat-Exchanger Tubes

OD:6-426mm THK:0.5-25mm
SUFACE:AP(Annealed and pickling) / MP(mechanically polish)/BA(bright annealed)
Product description: S30432 pipes, S30432 tubes,S30432 piping,S30432 tubing,Stainless steel S30432 pipes ,stainless steel S30432 piping, stainless steel Super 304H tubes ,stainless steel Super 304H tubing,stainless steel
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S30432 ASTM A213 Seamless Austenitic Alloy-Steel Boiler, Super 304H Superheater, and Heat-Exchanger Tubes

Type: Super 304H, UNS:S30432，

Key words

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Introduce of SA213 S30432 (Super 304H) Steel

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 ℃ 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

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 ℃.

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, ℃	Cooling medium	ASTM grain size class number
SA213 S30432 (Super 304H)	Solution treatment	≥1100	Water cooling or rapid cooling	---

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, which can be supplied by sumkin welding industries

ASME SA213 S30432 (Super 304H) Seamless Steel Tubes of TINSI-STEEL

Manufacture:Seamless process

Common specifications:OD:21.3-273.4MM THK 2.77-12.7MM,

Length: 5-7MTR or specified length as required.

Ends: Plain End, Beveled End, Treaded

Port of Shipment: Wenzhou,Ningbo, Shanghai, Tianjin, Wuxi, China

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