Manufacturer, Supplier & Exporter of Stainless Steel 420 Round Bar

The chemical composition of SS 420 round bars defines their characteristic properties. The steel typically contains 12–14% chromium, 0.15% or higher carbon, ≤1% manganese, ≤1% silicon, ≤0.04% phosphorus, and ≤0.03% sulfur, with the balance being iron. This composition provides moderate corrosion resistance while allowing the steel to achieve high hardness through heat treatment. The elevated carbon content makes SS 420 ideal for applications that require cutting edges, wear resistance, and precision components..

SS 420 round bars exhibit excellent mechanical properties. In the annealed condition, the tensile strength ranges between 655–860 MPa, with a yield strength of approximately 450 MPa and elongation near 20%. The material can be heat-treated to achieve hardness levels up to 50 HRC, making it suitable for tools, blades, and wear-resistant parts. Its density is approximately 7.74 g/cm³, and it is fully magnetic due to its martensitic structure. These mechanical characteristics make SS 420 a preferred choice in industries requiring both strength and wear resistance..

While SS 420 does not provide the same level of corrosion resistance as austenitic grades like 304 or 316, it performs well in mild to moderately corrosive environments. The steel is hardenable through quenching and tempering, allowing flexibility in achieving the desired balance between hardness and toughness. The heat treatment process is crucial for applications such as surgical instruments, knives, and industrial tooling, where precision and durability are essential. Its moderate corrosion resistance also makes it suitable for fasteners, pumps, and valve components in industrial settings...

Stainless Steel 420 Round Bar is widely used in cutlery, surgical instruments, scissors, and knives due to its ability to achieve high hardness and sharp edges. In industrial applications, it serves as pump shafts, valve parts, gears, and fasteners, providing wear resistance and mechanical strength. Its suitability for heat treatment also makes it a common choice for dies, molds, and tooling applications. The versatility of SS 420 round bars allows them to cater to both commercial and heavy engineering sectors, making it a reliable material for a wide range of industries..

Riddhi Siddhi Impex has an extensive domestic supply network across India, ensuring availability in both metro and industrial cities. They supply SS 420 round bars to Mumbai, Delhi, Bengaluru, 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, and Rajpipla. This wide network ensures timely delivery and consistent availability for industrial and commercial projects across India.

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

Riddhi Siddhi Impex emphasizes stringent quality control for all SS 420 round bars. Each batch undergoes material testing, chemical analysis, and mechanical property verification, ensuring compliance with international standards. The company offers custom lengths, diameters, surface finishes, and tolerance options based on client requirements. Third-party inspection and material test certificates (MTC) are available, providing customers with assured quality and traceability. This level of customization makes SS 420 round bars suitable for high-precision industrial, surgical, and tooling applications...

Frequently Asked Questions (FAQs)

Q1: What are the common applications of Stainless Steel 420 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.