Question
Download Solution PDFMain alloying element in stainless steel is:
This question was previously asked in
ISRO SAC Technician B Fitter 6 Nov 2016 Official Paper
Answer (Detailed Solution Below)
Option 1 : chromium
Free Tests
View all Free tests >
ISRO Technician B: Fitter Full Test 1
16.9 K Users
60 Questions
180 Marks
90 Mins
Detailed Solution
Download Solution PDFExplanation:
Stainless steel:
- Stainless steel is an alloy (mixture of two or more metals) consisting of iron, chromium, nickel, carbon, etc.
- Stainless steel is a metal alloy, made up of steel mixed with elements such as chromium, nickel, silicon, aluminum, and carbon.
- Iron is mixed with carbon to produce steel which is the main component of stainless steel.
- Chromium is added to make it resistant to rust.
- Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon, and other alloying elements.
- The main alloying element in stainless steel is chromium.
- Stainless steel's corrosion resistance and mechanical properties can be further enhanced by adding other elements, such as nickel, molybdenum, titanium, niobium, manganese, etc.
- It has high structural strength as well as resistance to corrosion.
- Stainless steels are not confined to applications requiring resistance to atmosphere corrosion.
- They are used extensively for chemical plant and food processing equipment where they combine corrosion resistance at elevated temperatures.
Stainless Steel Grade | 1.4016 | 1.4301 | 1.4462 |
Type | Ferritic | Austenitic | Duplex |
Molybdenum (%) | - | - | 2.5 |
Nickel (%) | - | 8 | 4.5 |
Chromium (%) | 17 | 17 | 21 |
Last updated on May 28, 2025
-> ISRO Technician Fitter recruitment notification 2025 has been released
->Candidates can fill ISRO Fitter application form from June 2 to 16.
->A total of 20 vacancies are announced for ISRO recruitment 2025 for Fitter.
->Candidates must have passed SSLC/ SSC/ Matriculation and should have NTC/ITI/NAC in ->Fitter Trade Certificate from an NCVT recognized by the government to satisfy the ISRO Technician B Fitter Eligibility Criteria.