Alloy No. 20 steel pipes

Alloy No. 20 steel (marketing department of Shanghai HY Industry Co., Ltd)

Alloy No. 20 is a solid-solution-strengthened iron-nickel-based alloy with extremely high corrosion resistance to sulfuric acid. It is widely used in high-concentration and high-temperature sulfuric acid environments. It is a corrosion-resistant steel among stainless steels. In addition, Alloy No. 20 also has excellent intergranular corrosion resistance and stress corrosion cracking resistance.

Material grades and equivalents

Grade name

Note

Alloy 20

Alloy No. 20

UNS N08020

ASTM A240/B463

F20

ASTM A182

CN7M

ASTM A351

Carpenter 20 CB 3TM

Carpenter Technology Corporation

2.4660

DIN

NAS 335X

NIPPON YAKIN

0Cr20Ni35Mo3Cu4Nb

GB previously

NS 143

GB/T 15007-1994

NS 1403

GB/T 15007-2008

chemical composition

C

Si

Mn

P

S

≤0.07

≤1.00

≤2.00

≤0.045

≤0.035

Ni

Cr

Mo

Cu

Nb

32~38

19~21

2.0~3.0

3.0~4.0

8×C~1.00

▲Above is the American standard data, and the GB standard has lower phosphorus and sulfur content (P≤0.030, S≤0.030)

 

▶Plastic workability

  • Can be treated the same as ordinary austenitic stainless steel.

▶Weldability

  • Welding is the same as quasi-austenitic stainless steel, TIG welding, MIG welding and manual arc welding can be used. Due to the Nb content, heat treatment should be minimized. Please use ER320, ER320LR as solder.

▶Machinability

  • Machinability is about the same as standard austenitic stainless steels. It is recommended to use high-speed steel tools or super-hard alloy tools for cutting. It is advisable to slow down the advancing speed and increase the cutting depth.

▶Heat treatment

  • The stable heat treatment condition is 925~1010°C (as specified in ASTM A480/A480M), and it must be quenched after heat treatment.

▶Pickling

  • A mixture of nitric acid and hydrogen fluoride is used for pickling, and the pickling conditions are the same as those of SUS 304 same.

▶Use

  • Sulfuric acid equipment, various chemical and petrochemical equipment.

Shanghai HY Industry Co., Ltd has international first-class material production equipment such as high temperature alloy isothermal forging production line, CONSARC vacuum melting furnace, VAR vacuum arc remelting furnace etc., with strong professional ability and highly responsible management team. We are a member of China Application of nuclear energy materials, Member of the International Council of the Aeronautical Sciences. Years of experience in Corrosion Resistant Alloy & Superalloy. When you have superalloy material inquiry, please contact us without hesitation. Shanghai HY Industry Co., Ltd is Corrosion & fatigue nickel alloy professional manufacturer,We will provide you with sincere and thoughtful service.

When you want to know more about our products, please contact us:

https://hynickelalloy.com