Quality

Quality Assurance

Commitment to Reliability

Raajratna Stainless Pvt. Ltd. prioritizes uncompromised quality and reliability at every stage—from sourcing raw materials to delivering finished stainless steel tubes. We follow rigorous internal testing protocols that consistently meet or exceed internationally recognized standards such as ASTM, DIN, ISO, EN, and JIS.

Key Attributes of Our Quality Management:

  • Comprehensive Traceability: Detailed documentation ensuring traceability from material procurement to final product.
  • Standardized Certification: Clearly structured 3.1 certificates capturing essential quality data.
  • Continuous Skill Development: Regular training programs maintaining a highly skilled and knowledgeable workforce.
  • Secure Supply Chain: Advanced supply chain management practices guaranteeing consistency and reliability.
  • Expert Inspections: Specialized professionals conducting detailed quality assessments and tests.
Key Attributes of Our Quality Management - Raajratna Tubes
Ensuring Excellence Through Rigorous Testing

Advanced Testing Capabilities

Raajratna Stainless Pvt. Ltd. employs state-of-the-art testing methods to guarantee our stainless steel tubes meet the highest standards of quality, safety, and performance. Our rigorous testing processes help identify and eliminate potential defects, ensuring reliability and excellence for diverse industrial applications.

  • Quality Inspection & Tests
Eddy Current Testing - Raajratna Tubes
Eddy Current Testing
Hydrostatic Testing--Raajratna Tubes
Hydrostatic Testing
IGC Testing - Raajratna Tubes
IGC Testing
PMI - Raajratna Tubes
PMI Tesing
Spectrometer Testing - Raajratna Tubes
Spectrometer Testing
Surface RougSurface Roughness Testing - Raajratna Tubeshness Testing -Raajratna Tubes
Surface Roughness Testing
Metallographic Borescope Testing - Raajratna Tubes
Metallurgy Microscopic Testing

Chemical Composition

Grade UNS Number Carbon (C) Max. Manga nese (Mn) Max. Phos phorous (P) Max. Sulphur (S) Max. Silicon (Si) Max. Chromium (Cr) Nickel (Ni) Molub denum (Mo) Nitrogen (N) Copper (Cu)
Austenitic Stainless Steel
304 S30400 0.08 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.00 — 0.10 –
304L S30403 0.03 2.00 0.045 0.030 1.00 18.0-20.0 8.0-12.0 — 0.10 –
316 S31600 0.08 2.00 0.045 0.030 1.00 16.0-18.0 10.0-14.0 2.00-3.00 0.10 –
316L S31603 0.03 2.00 0.045 0.030 1.00 16.0-18.0 10.0-14.0 2.00-3.00 0.10 –
904L N08904 0.02 2.00 0.040 0.030 1.00 19.0-23.0 23.0-28.0 4.00-5.00 0.10 1.00-2.00
1.4301 — 0.07 2.00 0.045 0.015 1.00 17.5-19.5 8.0-10.5 — 0.10 –
1.4307 — 0.03 2.00 0.045 0.015 1.00 17.5-19.5 8.0-10.5 — 0.10 –
316Lcs / 1.4404 — 0.03 2.00 0.045 0.005-0.017 1.00 16.5-18.5 10.0-13.0 2.00-2.50 0.10 –
1.4435 — 0.03 2.00 0.045 0.015-0.017 1.00 17.0-19.0 12.5-15.0 2.50-3.00 0.10 –
1.4539 — 0.02 2.00 0.030 0.010 0.70 19.0-21.0 24.0-26.0 4.00-5.00 0.10 1.00-2.00
Duplex Stainless Steel
Duplex 2205 S32205 0.03 2.00 0.03 0.02 1.00 22.0-23.0 4.50-6.50 3.00-3.50 0.10 –
Lean Duplex 2101 S32101 0.04 4.0-6.0 0.04 0.03 1.00 21.0-22.0 1.35-1.70 0.10-0.80 0.20-0.25 0.10-0.80
Lean Duplex 2304 S32304 0.03 2.50 0.04 0.04 1.00 21.5-24.5 3.00-5.50 0.05-0.60 0.05-0.20 0.05-0.60

Titanium Alloy Steel

Grade Nitrogen (N) Max. Carbon (C) Max. Hydrogen (H) Max. Iron (Fe) Max. Oxygen (O) Max. AL V Pa Ma Ni Others
Grade 1 0.03 0.08 0.015 0.20 0.18 – – – – – –
Grade 2 0.03 0.08 0.015 0.20 0.25 – – – — – –

Experience Quality That Defines Excellence

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  • Mechanical Testing Facilities
Flare, Flattening, Flange - Raajratna Tubes
Flaring, Flattening, Flanging Testings
Hardness Test - Raajratna Tubes
Hardness Testing
Reverse bend, Reverse flattening - Raajratna Tubes
Reverse bend, Reverse flattening
Tensile Testing - Raajratna Tubes
Tensile Testing

Other Tests

  • 100% visual & dimension inspection
  • ID surface roughness measurements
  • Corner cut measurements
  • Weld decay test
  • Micro Test (Grain Size Number)

Mechanical Properties

Grade UNS Number ASTM Specificaon Tensile Strength Min. (Mpa) Yield Strength Min (Mpa) Elongation(%) (Min.) Hardness (Max.)
Austenitic Welded Stainless Steel
304 S30400 ASTM A270 / A249 / A269 515 205 35 90 HRB
304L S30403 ASTM A270 / A249 / A269 485 170 35 90 HRB
316 S31600 ASTM A270 / A249 / A269 515 205 35 90 HRB
316L S31603 ASTM A270 / A249 / A269 485 170 35 90 HRB
904L N08904 ASTM 249 490 215 35 90 HRB
1.4307 — EN 10217-7 470-670 180 40 —
1.4404 — EN 10217-7 490-690 190 40 —
1.4435 — EN 10217-7 490-690 190 40 —
1.4539 — EN 10217-7 520-720 220 35 —
Duplex Welded Stainless Steel
Duplex 2205 S32205 ASTM 789 / A790 655 485 25 30 HRC
Lean Duplex 2101 S32101 A789 700 530 30 30 HRC
Lean Duplex 2304 S32304 ASTM 789 / A790 620 485 30 30 HRC

Titanium Welded Tubes

Grade UNS Number ASTM Specification Resistanceto Traction (Mpa) Tensile Strength (Mpa) Elongation(%) (Min.)
Grade 1 R50250 ASTM B 338 240 170 24
Grade 2 R50400 ASTM B 338 345 275 20

Product Finish Specification

Process Designation Equivalent to Surface Treatment Inside Surface Finish Value (Ra)
Outer Surface Inner Surface μ-ln (max) μ-m (max)
BA – BA SF0 Bright Annealed Bright Annealed – –
MP – BA SF3 Mechanical Polished Bright Annealed 30 ≤ 0.76
MP – MP SF2 Mechanical Polished Mechanical Polished 25 ≤ 0.64
SF1 20 ≤ 0.51
MP – EP SF4 Mechanical Polished Electro Polished 15 ≤ 0.38
SF5 20 ≤ 0.51
SF6 25 ≤ 0.64
Product Packaging:

Stainless Steel Tubes Packing

We Provide packaging solutions that guarantee the integrity of products during transport, storage, and handling:

Wooden Box - Raajratna Tubes
Wooden Box

Durable, sustainable, and protective packaging solution offering superior protection and ease of handling.

Hexagonal Packaging - Raajratna Tubes
Hexagonal Packaging

Robust, space-efficient packaging designed specifically to ensure tube integrity and simplify stacking and transport logistics.

Tube Marking Information

Each stainless steel tube is clearly marked with essential identification details to ensure full transparency and ease of traceability:

Stainless Steel Tube Marking - Raajratna Tubes
Mfgr. Name Standard Grade Mfg. Method Size Thickness Finish Hydro Test Heat No. Made in India
Raajratna Stainless Pvt. Ltd. ASTM A270 TP316L Welded Tube OD 19.05 WT 1.65 MPMP HTP:1000PSI 90009 Made in India
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