Manufacturer, Supplier & Exporter of 4340 Alloy Steel Shim

4340 Alloy Steel Shim is a high-strength, low-alloy steel shim known for its superior toughness, fatigue resistance, and high tensile strength. Composed primarily of nickel, chromium, and molybdenum, 4340 steel exhibits excellent mechanical properties, especially when heat treated. The shim form of this alloy is widely used in critical aerospace, automotive, power transmission, and heavy machinery applications where precision alignment, spacing, or tolerance adjustments are necessary under extreme conditions. Its strength-to-weight ratio and impact resistance make it ideal for use in demanding environments.

Riddhi Siddhi Impex, based in Mumbai, India, is a well-known manufacturer and domestic supplier of 4340 Alloy Steel Shims. With decades of experience in alloy steel processing and metal fabrication, the company provides high-performance shims in various thicknesses, widths, and finishes. They offer both standard and customized options to meet client specifications in sectors like defense, railways, energy, and marine engineering. Each shim is manufactured using advanced processes that ensure dimensional accuracy, consistent mechanical properties, and compliance with global quality standards such as AISI, ASTM, and EN.

Being a domestic supplier, Riddhi Siddhi Impex distributes 4340 alloy steel shims across India, especially to cities like Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, and Vadodara. These urban industrial hubs are home to numerous aerospace component manufacturers, automotive OEMs, precision engineering firms, and research institutions that require reliable and high-strength materials for their critical operations. Riddhi Siddhi Impex supports these clients with just-in-time delivery, quality assurance, and tailored machining solutions.

The company also actively caters to demand from emerging industrial centers such as Rajkot, Indore, Nagpur, Bhopal, Jaipur, Kanpur, Lucknow, Agra, and Varanasi. In these cities, the demand for 4340 steel shims is growing due to the expansion of manufacturing and maintenance facilities. Applications often include turbine alignment, heavy-duty gearboxes, bearing housing fits, and machine bed leveling. Riddhi Siddhi Impex ensures on-time supply and offers flexibility in order sizes, making them a preferred source for both large-scale projects and small, urgent needs.

In northern and western India, Riddhi Siddhi Impex’s shims are widely used in Amritsar, Chandigarh, Udaipur, Jodhpur, and Mysuru, where the company has built strong partnerships with local distributors and engineering firms. The superior mechanical strength of 4340 alloy makes it suitable for high-load environments, such as press machinery, lifting equipment, and structural support systems in manufacturing units. Their domestic logistics network ensures safe, timely, and cost-effective delivery even in regions that are traditionally underserved.

4340 Alloy Steel Shim – Specifications and Technical Details

Specification

Property	Details
Grade	AISI 4340 / ASTM A681
Material Type	Nickel-Chromium-Molybdenum Alloy Steel
Thickness Range	0.05 mm – 3.00 mm
Finish	Cold Rolled, Annealed, Hardened & Tempered
Form	Sheets, Strips, Shims, Coils, Custom Cut

Chemical Composition (% by Weight)

Element	Content
Carbon (C)	0.38 – 0.43
Manganese (Mn)	0.60 – 0.80
Chromium (Cr)	0.70 – 0.90
Nickel (Ni)	1.65 – 2.00
Molybdenum (Mo)	0.20 – 0.30
Silicon (Si)	0.15 – 0.35
Phosphorus (P)	≤ 0.035
Sulfur (S)	≤ 0.040

Mechanical Properties

Property	Value
Tensile Strength	930 – 1080 MPa (Hardened & Tempered)
Yield Strength	≥ 745 MPa
Hardness	28 – 36 HRC (Annealed), up to 60 HRC (Hardened)
Elongation	> 14%
Modulus of Elasticity	~205 GPa

Dimension Chart

Thickness (mm)	Width (mm)	Length (mm)
0.05 – 3.00	10 – 1000	100 – 3000

Equivalent Grades & Standards

Standard	Equivalent Grade
ASTM	A681 Type 4340
AISI/SAE	4340
EN	1.6511 / 34CrNiMo6
DIN	34CrNiMo6
JIS	SNCM439

Other Types of Shims Offered

Shim Type	Typical Applications
Low Carbon Steel Shim	General purpose, low-stress applications
High Carbon Steel Shim	Wear resistance, tooling applications
Stainless Steel Shim	Corrosion resistance, chemical and food industry
Brass Shim	Electrical and decorative applications
Copper Shim	Thermal and electrical conductivity

Southern industrial cities like Coimbatore, Visakhapatnam, Madurai, Kochi, Thiruvananthapuram, Mangalore, and Bengaluru see increasing usage of 4340 alloy steel shims in automotive and power generation sectors. Companies operating in turbine manufacturing, gearbox assembly, and marine propulsion often require precision-ground shims made of 4340 for optimal equipment performance and reduced downtime. Riddhi Siddhi Impex provides such precision components with test certificates and customized packaging.

Frequently Asked Questions (FAQs)

Q1: What are the benefits of using 4340 Alloy Steel Shim?

A1: 4340 Alloy Steel Shim offers exceptional strength, toughness, and fatigue resistance, ideal for high-stress applications in aerospace, automotive, and heavy machinery.

Q2: Can 4340 shims be customized to specific dimensions?

A2: Yes, Riddhi Siddhi Impex provides customized thickness, width, length, and heat treatment options to meet client requirements.

Q3: What are the typical delivery lead times for domestic supply?

A3: Delivery lead times typically range from 3 to 7 business days depending on the city and order size, covering all major Indian industrial hubs.

Q4: Are heat-treated 4340 Alloy Steel Shims available?

A4: Yes, heat-treated, hardened & tempered, as well as annealed 4340 shims are available with quality certifications on demand.