SHIELD METAL ARC WELDING (SMAW)

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NSS-505

Specification
AWS Specification: AWS A5.4 E505-16
JIS Specification: N/A
Other Specification: DIN ECrMo9B26
Description
  • NSS-505 provides the weld metal consisting of 9% Cr-Mo
  • Used for welding conditions that are too severe for N-9018-B3 or NSS-502
TYPICAL CHEMICAL COMPOSITION OF ALL WELD METAL DEPOSITS (%):

C

Si

Mn

Cr

Mo

0.08

0.74

0.98

8.48

0.90

 

TYPICAL MECHANICAL PROPERTIES OF ALL WELD METAL DEPOSITS:
Tensile Strength
N/mm2 (KSI)
 
 Yield Point N/mm2 (KSI)
Elongation
%
 

480 (70)

 570 (58)

26

 

SIZE AND RECOMMENDED CURRENT RANGE: AC, DC (+)

DIAMETER (mm)

 2.5

3.2

4.0

5.0

LENGTH (mm)

 350

350

400

400

Current Amp

Flat

 55 - 85

75 - 115

150 - 160

160 - 220

Vertical & Overhead

 50 - 80

70 - 110

90 - 150

-

Welding Positions: ALL POSITIONS 
Approvals: N/A

NOTE:

The information contained or otherwise referenced herein is presented only as “typical” without guarantee or warranty, and Industrial Welding Corporation expressly disclaims any liability incurred from any reliance thereon. Typical data and test results for mechanical properties, deposit, or electrode composition and other properties were obtained from a weld produced and tested according to prescribed standards and should not be assumed to be the expected results in a particular application or weldment. Actual results will vary depending on many factors, including, but not limited to, weld procedure, plate chemistry and temperature, weldment design, and fabrication methods. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended application.

  • Welding of 9% Cr-1% Mo steel used for super-heater tubes of high temperature, high pressure boiler, and heater tube for refining industries
  • Primarily for petro and petrochemical industries
  • ?Dry the electrodes at 325-375°C for about one hour before use
  • ? Preheat at 250-350°C and post heat at 720-780°C
  • ? Adopt back step method or strike the arc on a small steel plate prepared for this particular purpose to prevent blowholes at the arc starting
  • Keep the arc length as short as possible

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