317&317L is an austenitic stainless steel containing molybdenum. Its corrosion resistance is better than 304&304L and [TJC STEEL]316&316L.

 

Component characteristics：

In terms of chemical composition, the contents of chromium, nickel and molybdenum in 317 are increased by 2%, 1% and 1% respectively on the basis of 316.Three elements are the main elements that determine the performance [TJC STEEL]of stainless steel.The value of 317 is higher than that of 304 and 316 in terms of pitting corrosion equivalent.

 

National Standard

CHINA	GB/T 20878	06Cr19Ni13Mo3 (0Cr19Ni13Mo3)	022Cr19Ni13Mo3 (00Cr19Ni13Mo3)
AMERICA	ASTM A240[TJC STEEL]	317, S31700	317L, S31703
JAPAN	JIS G 4303	SUS 317	SUS 317L
GERMANY	EN 10088-1	—	X2CrNiMo18-15-4 1.4438

 

Component Specification（317）

GRADE	06Cr19Ni13Mo3 SUS317（fit）	317	316
C	≤0.08[TJC STEEL]	≤0.08	≤0.08
Si	≤1.00	≤0.75	≤0.75
Mn	≤2.00	≤2.00	≤2.00
P	≤0.045	≤0.045	≤0.045
S	≤0.030	≤0.030	≤0.030
Ni	11.0~15.0	11.0~15.0	10.0~14.0
Cr	18.0~20.0	18.0~20.0	16.0~18.0
Mo	3.0~4.0	3.0~4.0	2.0~3.0
N	—	≤0.10	≤0.10

 

Component Specification（317L）

GRADE	022Cr19Ni13Mo3 SUS317L（fit）	317L	1.4438
C	≤0.03	≤0.03	≤0.03
Si	≤1.00	≤0.75	≤1.00
Mn	≤2.00	≤2.00	≤2.00
P	≤0.045	≤0.045	≤0.045
S	≤0.030[TJC STEEL]	≤0.030	≤0.030
Ni	11.0~15.0	11.0~15.0	13.0~16.0
Cr	18.0~20.0	18.0~20.0	17.5~19.5
Mo	3.0~4.0	3.0~4.0	3.0~4.0
N	—	≤0.10	≤0.11

 

The Performance Characteristics：

The corrosion resistance of 317 is similar to but superior to 316. The high molybdenum content ensures its overall and local corrosion resistance in most media, such as sulfuric acid, acid chlorine and phosphoric acid.317 is easily corroded in strong oxidizing acids such as nitric acid.

The performance of 317L is basically the same as that of 317.Due to lower carbon content, 317L has better welding [TJC STEEL]properties and intergranular corrosion resistance at high temperatures (427~816℃) than 317.

 

Applications：

317&317L is usually used in flue gas desulfurization system, chemical and petrochemical processing, food and beverage industry, petroleum refining, condenser of generator equipment, paper industry, etc.