Characteristics and uses of each series of stainless steel: 300 series
Second, 300 series
a, 304
1Cr18Ni9
(06Cr18Ni10)
SUS304
Characteristics: As one of the most widely used steel grades, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties. Good hot workability such as stamping and bending, no heat treatment hardening (non-magnetic, use temperature -196 ° C ~ 800 ° C)
Uses: Mainly used in home appliances, tableware, kitchen utensils, water heaters, boilers, food machinery, etc.; currently in Guangdong Province, stainless steel decorative welded pipe manufacturing field has also been used in a number of applications, such as Haili, Great Wall, Yuehua, Xingzhongcheng, Jian Yuan, Baocheng, Wanjiayu, Shihuang, Yuguan, Yunsheng, Minggao and many other 304 stainless steel products of Guangdong Province Stainless Steel Materials and Products Association member companies.
b, 304J1
SUS304J1
Characteristics: Cu should be added, its formability, especially wire drawing and anti-aging cracking, and complex shape forming. Its corrosion resistance is the same as that of 304 steel.
Uses: Mainly used for thermos bottles, kitchen sinks, pots, pots, insulated lunch boxes, door handles, textile processing machines, etc.
c, 304L
00Cr19Ni10
SUS304L
Characteristics: As a low C 304 steel, its corrosion resistance is similar to that of 304 steel under normal conditions, but its resistance to intergranular corrosion is excellent after welding or after stress relief. It can maintain good corrosion resistance without heat treatment, generally used below 400 (non-magnetic, use temperature -196 ° C ~ 800 ° C)
Uses: It is applied to field open-air machines, building materials, heat-resistant parts and parts with difficult heat treatment in the chemical, coal and petroleum industries with high resistance to intergranular corrosion.
d, 321
1Cr18Ni9Ti
SUS321
Characteristics: Ti element is added to 304 steel to prevent grain boundary corrosion. Suitable for use at temperatures from 430 ° C to 900 ° C.
Uses: Mainly used in medical equipment, building materials, chemicals, agriculture, ship parts, atomic energy industry, aircraft, pipe, boiler steam drum auto parts (windshield wipers, mufflers, molded products).
e, 316
0Cr17Ni12Mo2
SUS316
Characteristics: Mo should be added, so its corrosion resistance, atmospheric corrosion resistance and high temperature strength are particularly good, and it can be used under harsh conditions. Excellent work hardening (non-magnetic)
Uses: Mainly used in seawater equipment, chemicals, dyes, paper. Production equipment such as oxalic acid and fertilizer; food industry, coastal facilities, ropes, CD rods, bolts and nuts.
In recent years, some member companies of Guangdong Stainless Steel Materials and Products Association, such as Yi Ding and Ming Hao, have begun to focus on the production of 316 stainless steel pipes. .
f, 316L
00Cr17Ni14Mo2
SUS316L
As a low-C series of 316 steel, it has excellent resistance to intergranular corrosion in addition to the same characteristics as 316 steel.
Uses: In 316 steel applications, products that are particularly resistant to grain boundary corrosion.
g, 309S
0Cr23Ni13Mo2
SUS309s
Features: 23Cr-13Ni high alloy steel stainless steel, excellent corrosion resistance and strength.
Uses: Suitable for parts with working temperature of 1000 °C; exhaust machine, heat treatment furnace and heat exchanger.
h, 310S
0Cr25Ni20Si2
SUS310S
Characteristics: It has good oxidation resistance, corrosion resistance and high temperature resistance. Because of the high percentage of chromium and nickel, 310S has much better creep strength, can work continuously at high temperature, and has good high temperature resistance. .
Uses: Mainly used in boilers, exhaust machines, heat treatment furnaces and heat exchangers.
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