Contact us
  • : 0086-21-61182423
  • : 0086-21-61182425
  • : [email protected]
  • : Room 301,Unit 6,lane 2500,xiupu Road,Kangqiao Industrial Area,Pudong New District,Shanghai
You are here: Home- NewsChina Austenitic stainless steel 302 Weldability

China Austenitic stainless steel 302 Weldability

Posted:2016/8/22 3:41:56

Austenitic Cr-Ni stainless steel 302 . More corrosion resistant than Type 301 and because of higher Ni content does not work harden as quickly as Type 301. Essentially non-magnetic in annealed condition, slightly magnetic in cold worked condition.

 

302 Chemical composition(%):

 

C

Mn

Si

P

S

Cr

Ni

N

302

max: 0.15

max:2.0

max: 0.75

max: 0.045

max: 0.03

min: 17.0 max: 19.0

min: 8.0 max: 10.0

max: 0.10

 

302 Physical properties:

Density
lbm/in3

Thermal Conductivity
(BTU/h ft. °F)

Electrical
Resistivity
(in x 10-6)

Modulus of
Elasticity
(psi x 106

Coefficient of
Thermal Expansion
(in/in)/
°F x 10-6

Specific Heat
(BTU/lb/
°F)

Melting
Range
(°F)

at 68°F: 0.285

9.4 at 212°F

72.0 at 70°F

28

9.6 at 32 – 212°F

0.1200 at 32°F to 212°F

2500 to 2590

 

12.4 at 932 °F

 

 

10.2 at 32 – 1000°F

 

 

 

 

 

 

10.4 at 32 – 1500°F

 

 

Hot working requires uniform heating to 1149°C (2100°F) while cold working helps to increase the hardness of this material. Grade 302 is quite ductile and can be readily drawn, spun and upset. Cold working causes this alloy to gain magnetic properties, and hence post-fabrication annealing is required to recover maximum corrosion resistance and a non-magnetic condition. Annealing is performed between 1010 and 1121°C (1850 and 2050°F) with fast cooling so as to avoid precipitation of chromium carbides.

 

302 Weldability :

Welding grade 302, it is recommended that by resistance or shielded fusion methods. The filler metals to be used are AWS E/ER308 or 312. Post weld annealing is performed when the chromium carbide needs to be dissolved so as to provide maximum resistance to inter-granular attack. Forging is ideally performed at these temperatures - 1149-1260°C (2100-2300°F). It is advisable not to forge below 927°C (1700°F). Forgings should be fully annealed after all operations, post weld annealing dissolves the chromium carbide and is recommended for maximum resistance to intergranular attack.

 

302 Application:

Stamping
Spinning
Wire forming
Formed into all types of washers, springs, screens, and cables
Food and beverage industry
Pressure containing applications
Sanitary or cryogenic applications

 

 

Phone: 0086-18317160019
TEL: 0086-21-61182423
Fax: 0086-21-61182425
E-mail: [email protected]
Skype: shanghai.katalor
Address : Room 301,Unit 6,lane 2500,xiupu Road,Kangqiao Industrial Area,Pudong New District,Shanghai

InquiryPlease feel free to give your inquiry in the form below. we will reply you quickly!
Name: *
E-mail: *
Country: *
Tel:
 
Company:
Language:
Product: steel plate steel pipe shipbuilding steel
Message: Please enter details such as Material, Specification, Quantity, Port, other requirments !
 
Copyright © 2011 by Shanghai Katalor Enterprises Co., Ltd. All rights reserved