Manufacturer, Supplier & Exporter of Stainless Steel 347 Round Bar

Riddhi Siddhi Impex, headquartered in Mumbai, is a leading manufacturer, supplier, and exporter of stainless steel products in India. The company has earned a strong reputation for providing high-quality stainless steel bars, rods, sheets, coils, flanges, and fittings. Among their specialty offerings is the Stainless Steel 347 Round Bar, a high-performance alloy designed for demanding industrial and high-temperature applications...

Stainless Steel 347 is an austenitic stainless steel grade stabilized with niobium (columbium) to prevent carbide precipitation during welding or prolonged high-temperature exposure. This stabilization enhances the alloy’s resistance to intergranular corrosion and ensures structural integrity in welded assemblies. The low carbon content and addition of niobium make SS 347 particularly suitable for high-temperature and corrosive environments..

The chemical composition of SS 347 typically includes 17–19% chromium, 9–13% nickel, with niobium added in proportion to the carbon content (Nb ≥ 10 × C). Minor elements such as manganese, silicon, and phosphorus are present in controlled quantities, while the balance is iron. This unique combination allows SS 347 to maintain excellent corrosion resistance and oxidation resistance at elevated temperatures...

Mechanically, SS 347 exhibits tensile strength ranging from 515 to 750 MPa, yield strength of approximately 205 MPa, and elongation of ≥40%, providing excellent ductility for forming, machining, and fabrication processes. The hardness typically remains under 95 HRB, ensuring workability without excessive wear on tools. These properties make SS 347 round bars ideal for heavy-duty and high-temperature industrial applications..

Riddhi Siddhi Impex ensures strict quality control at every stage of manufacturing and supply. SS 347 round bars from Riddhi Siddhi comply with ASTM A276, ASTM A479, ASME SB 479, and EN 10278 standards. Every batch comes with Mill Test Certificates (MTC) and chemical/mechanical test reports, guaranteeing traceability, conformity, and performance in critical industrial applications..

PP Coated Carbon Steel Pipes

Specification

Product Name	PP Coated Carbon Steel Pipes
Manufacturer	Riddhi Siddhi Impex
Base Material	Carbon Steel (ASTM A106 / A53 / API 5L)
Coating Material	Polypropylene (PP) – Single or 3-Layer (3LPP)
Standard	ISO 21809-1 / DIN 30678 / ASTM / API
Size Range	1/2” NB to 48” NB
Wall Thickness	Sch 20 to Sch 160 / XXS
Length	Single Random, Double Random, or Cut Lengths
Coating Thickness	1.8 mm to 4.5 mm (Customizable)
Pipe Ends	Plain End (PE), Beveled End (BE), or Threaded
Form	Seamless, Welded, ERW, or LSAW
Applications	Oil & Gas Pipelines, Water Supply, Chemical Transport, Marine Projects

Chemical Composition (Base Carbon Steel)

Element	Content (%)
Carbon (C)	0.23 Max
Manganese (Mn)	0.30 – 1.06
Phosphorus (P)	0.05 Max
Sulfur (S)	0.045 Max
Silicon (Si)	0.10 – 0.35
Copper (Cu)	0.40 Max
Nickel (Ni)	0.40 Max
Chromium (Cr)	0.40 Max

Mechanical Properties

Property	Value
Tensile Strength	≥ 415 MPa
Yield Strength (0.2% offset)	≥ 240 MPa
Elongation	≥ 20%
Hardness	≤ 95 HRB
Impact Resistance	Excellent (Due to PP Coating)
Coating Adhesion	Strong Adhesion per ISO 21809-1

Dimension Chart (Nominal)

Nominal Pipe Size (NB)	Outside Diameter (mm)	Wall Thickness (mm)	Length
1/2"	21.3	2.77	Up to 12 m
1"	33.4	3.38	Up to 12 m
2"	60.3	3.91	Up to 12 m
4"	114.3	6.02	Up to 12 m
6"	168.3	7.11	Up to 12 m
10"	273.1	9.27	Up to 12 m
16"	406.4	12.70	Up to 12 m

Equivalent Grades

Standard	Grade
ASTM	A106 Grade B / A53 Grade B
API	5L Grade B / X42 / X52
EN	EN 10216 / EN 10224
DIN	St 37.2 / St 52.3
BS	3601 / 3602

Equivalent Standards

Standard	Description
ASTM A106 / A53	Standard Specification for Carbon Steel Pipe for High-Temperature and Pressure Service
API 5L	Specification for Line Pipe
ISO 21809-1	External Polypropylene Coatings for Buried or Submerged Pipelines
DIN 30678	3-Layer Polypropylene Coating for Steel Pipes

Other Types of Coated Steel Pipes

Type	Description
3LPE Coated Pipes	Three-layer polyethylene coated pipes for enhanced corrosion protection
FBE Coated Pipes	Fusion Bonded Epoxy coated pipes for superior adhesion and corrosion resistance
Internal Epoxy Coated Pipes	Epoxy-coated internal surfaces for smooth fluid flow
PE Coated Pipes	Polyethylene-coated carbon steel pipes for underground applications

The company’s domestic supply network covers a wide array of Indian cities, including Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru, Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, Rajpipla, and more. This extensive coverage ensures that high-quality SS 347 round bars are accessible across India.

Frequently Asked Questions (FAQs)

Q1: What are the common applications of Stainless Steel 347 Round Bar?

A1: It is widely used in heat exchangers, automotive trim, kitchenware, architecture, and chemical equipment.

Q2: Can you provide custom thicknesses and widths?

A2: Yes, we offer custom shims in various thicknesses, widths, and finishes based on your project needs.

Q3: Is SS 201 corrosion-resistant?

A3: Yes, SS 201 offers moderate corrosion resistance and is ideal for environments where high strength is required over high corrosion resistance.

Q4: What finishes are available for SS 201 Shim?

A4: Available finishes include 2B, BA, No.4, Mirror, and customized finishes on request.