347

In a strong oxidizing environment, the corrosion resistance of Type HuaNickel 347 stainless steel is slightly improved compared to Type 321 stainless steel. Type HuaNickel 347 is stable with a column and is more suitable for aqueous and cryogenic environments due to its good resistance to intergranular attack. Both 347 and 321 are resistant to good polysulfuric acid stress corrosion cracking.

347Chemical composition：

	Fe	Cr	Ni	Cb+Ta	C	Si	Mn	P	S
Min	Bal	17	9	Cb 10xc (Cb 8xC)	0.04	–	–	–	–
Max		19	13	1	0.08	0.75	2	0.45	0.03

347Physical properties：

Density	Melting point
0.282 lb/in3	2550 – 2635°F

347Mechanical properties：

Temperature, °F	68	400	800	1000	1200	1350	1500
Ultimate tensile strength, ksi	93.3	73.6	69.5	63.5	52.3	39.3	26.4
0.2% yield strength, ksi	36.5	36.6	29.7	27.4	24.5	22.8	18.6

347Stainless steel characteristics：

Good creep strength up to 1500°F

Maintains good corrosion resistance in applications with temperatures between 800°F and 1500°F

Under welding conditions, it has good resistance to intergranular corrosion

347Uses of stainless steel：

Refineries, Fluid Catalytic Cracking Units (Face-Centered Cubes), Booms, Recovery Tube Sheet Housings, Brackets,

Relevant standards：

AMS: 5512 ASTM: A 240, A 262 Practice E ASME: SA-240

PWA: F17 LCS, PWA 300 MSRR:5632