Sheet metal fabrication is a manufacturing process used to form and process metal sheets into various shapes. Sheet metal fabrication is widely used in a variety of industries. In addition to familiar products such as automobiles and household appliances, it is also applied to industrial machinery, manufacturing equipment, and medical devices. When planning a sheet metal fabrication project, it is essential to obtain quotations from potential suppliers. A quotation serves not only as the basis for selecting the most suitable supplier but also as an important tool for identifying and reducing unnecessary costs.
In this article, we will explain the main items included in sheet metal fabrication quotations and the factors that affect pricing. We will also provide practical tips on how to reduce costs in an easy-to-understand manner.
Contents
- What is a sheet metal fabrication quotation?
- Cost components and factors affecting sheet metal fabrication quotations
- How to reduce sheet metal fabrication quotation costs
- Conclusion
What is a sheet metal fabrication quotation?
Sheet metal fabrication is a manufacturing process that involves forming flat metal sheets into various shapes. It is classified as a type of metal forming process, one of the major categories of manufacturing methods in which force is applied to the material to deform it permanently into the desired shape. Once the applied stress exceeds a certain threshold known as the “yield point”, the material no longer returns to its original shape. As a result, sheet metal fabrication is considered a highly specialized process that demands technical expertise and experience.
Many products that we encounter in everyday life, such as automobiles, household appliances, elevators, and industrial equipment, are manufactured using sheet metal fabrication processes.
When developing or manufacturing products that require sheet metal fabrication, it is necessary to contact a specialized sheet metal fabrication supplier, provide the required information, and request a quotation.
A quotation serves not only to estimate the cost of the project but also as an important process for aligning expectations between the customer and the supplier regarding the project requirements. By confirming details such as the fabrication method, material selection, and delivery requirements in advance, both parties can more easily establish a shared understanding of the desired final product and help prevent potential issues and disputes.
Cost components and factors affecting sheet metal fabrication quotations
A sheet metal fabrication quotation typically consists of three main cost components:「Material cost」, 「Fabrication cost」, and「Special processing cost」．
| Items | Details |
| Material cost | The cost of raw materials (base metals) is used for fabricated parts. |
| Fabrication costs | Fabrication cost includes expenses related to equipment operation, tooling, and labor required for manufacturing. |
| Special processing cost | The cost is incurred when additional special processes, such as heat treatment and surface finishing, are required. |
The costs and total quotation amount can vary depending on factors such as the fabrication method, material selection, production volume, and the type and extent of any special processing required.
The following sections provide a detailed explanation of the four major factors that influence sheet metal fabrication quotation prices.
Fabrication method
Sheet metal fabrication methods can generally be divided into two categories: Manual sheet metal fabrication and machine sheet metal fabrication. Manual sheet metal fabrication is performed by skilled technicians using hand tools such as shears and hammers, whereas machine sheet metal fabrication uses specialized equipment to process metal sheets. In conventional sheet metal fabrication (mass production), machine-based fabrication is commonly employed to improve production efficiency.
Machine sheet metal fabrication includes various processing methods, such as cutting, bending, welding, drilling, and tapping. Since each method involves different manufacturing processes and levels of complexity, the associated costs can vary significantly.
In general, complex bending operations and precision welding processes tend to be more expensive because they require advanced technical expertise and specialized fixtures. In addition, the cost of cutting and drilling operations can vary depending on the equipment used and the level of machining accuracy required.
Material
In sheet metal fabrication quotations, material selection is one of the most significant factors affecting cost. In general, sheet metal materials tend to increase in price in the following order: Steel > Aluminum > Brass > Stainless steel.
If cost-effectiveness is the primary consideration when selecting a material, relatively inexpensive materials such as steel and aluminum are often suitable choices. On the other hand, if durability, corrosion resistance, or appearance is a higher priority, materials such as stainless steel and brass are generally recommended.
In addition, while stainless steel offers excellent corrosion resistance and heat resistance, it is generally more difficult to process and requires more machining effort than many other materials. As a result, stainless steel sheet metal fabrication quotations tend to be higher. Therefore, when selecting material, it is important to consider not only the budget but also the product’s intended application and required performance characteristics.
Related article: “Detailed explanation about classification & characteristics of raw materials and processing methods affecting stainless steel machining quotations”
Related article: “Why aluminum machining quotations differ among suppliers? A guide to choosing the right machining partner”
Production quantity
Sheet metal fabrication quotation prices also vary depending on the production quantity. Production quantity refers to the number of parts manufactured in a single production run.
In general, the larger the production quantity, the lower the unit processing cost tends to be. With sheet metal fabrication manufacturers incur a certain amount of setup and preparation work regardless of the production volume. As a result, in small-lot production, these fixed costs must be allocated to fewer parts, leading to a higher cost per unit. For example, if only one part is ordered, all setup and preparation costs are reflected in that single item. In contrast, when 1,000 parts are produced, the same costs can be distributed across a much larger quantity, resulting in a lower unit price.
The following example shows how production quantity affects unit cost at lot sizes of 10, 100, and 500 units.
| About 10 units | The setup and preparation costs are spread over only a small quantity of products, therefore the cost per unit tends to be higher. |
| About 100 units | Setup costs are distributed more efficiently, and cost benefits start to become noticeable. |
| About 500 units | Significant cost reductions can be achieved through mass production. |
However, low-volume production does not always lead to higher costs. By carefully designing the product and choosing appropriate processing methods, it is possible to reduce costs even in low-volume production.
At Agency Assist Vietnam, we have extensive expertise in prototype sheet metal fabrication and precision sheet metal production for low-volume orders. We also offer flexible and customized solutions designed to meet each customer’s unique requirements.
Special processing
In addition to basic forming and cutting operations, sheet metal fabrication may also involve special processing to enhance the appearance and functionality of the final product. Common special processes include 「Surface finishing」,「Painting」,「Plating」, and「Marking & Printing」．
| Items | Main processing methods | Purpose/ Characteristics |
| Surface finishing | Polishing, buff polishing, hairline finish, etching | Improves appearance and increases durability. |
| Painting | Baked coating, powder coating, electrocoating | Enhances corrosion resistance, durability, and aesthetics. |
| Plating | Zinc plating, nickel plating, chrome plating | Improves corrosion resistance and durability. |
| Marking & Printing | Screen printing, laser marking | Prints model numbers, logos, and scale markings. |
The cost of a sheet metal fabrication quotation can vary significantly depending on whether special processing is required and the level of precision needed. Therefore, it is important to select the most appropriate processing methods while carefully balancing the desired quality of the finished product with the overall cost.
How to reduce sheet metal fabrication quotation costs
The cost of a sheet metal fabrication quotation is greatly influenced by factors such as the fabrication method, material type, and order conditions. In particular, low-volume production and custom-made parts often result in higher costs, making it common for quotation prices to be higher than initially anticipated.
To help minimize unnecessary expenses while maintaining the required quality and functionality, the following sections introduce four practical ways to reduce sheet metal fabrication quotation costs.
Obtain quotations from multiple suppliers
If you want to keep sheet metal fabrication costs as low as possible, it is important to obtain quotations from multiple sheet metal fabrication suppliers.
If you request a quotation from only one supplier, it can be difficult to determine whether the quoted price is reasonable, and you may end up paying more than necessary. On the other hand, by obtaining quotations from multiple suppliers, you can gain a better understanding of the appropriate price range and clearly compare differences in pricing, processing methods, and service offerings. This enables you to select the supplier that best meets your requirements.
However, choosing the supplier with the lowest price is not always the best approach. If the quoted price is excessively low, there may be potential issues related to quality, delivery performance, or service reliability. Therefore, it is important to carefully compare both the quotation details and the pricing and select a supplier that offers the best overall balance of quality, delivery and cost.
Prepare data in a format accepted by the supplier
The format of design drawings used for sheet metal fabrication varies from one supplier to another. In general, some suppliers work primarily with 2D data, while others prefer 3D data.
2D data consists of drawings that represent a part in a flat, two-dimensional format and is suitable for relatively simple shapes and fabrication requirements. In contrast, 3D data can represent the geometry of sheet metal parts in greater detail, making it particularly useful for complex shapes and high-precision fabrication.
If 3D data is provided to a sheet metal fabrication supplier that works primarily with 2D data, the supplier may need to convert the 3D model into 2D drawings before production. This conversion process requires additional time and effort, which can increase the quotation cost and may also affect the delivery schedule.
Therefore, it is best to provide 3D data to suppliers that use 3D models and 2D drawings to suppliers that work with 2D data.
Allow sufficient lead time
If a short lead time is requested for a sheet metal fabrication project, additional charges may apply. Conversely, allowing a longer lead time can not only help avoid rush-order surcharges but also provide greater flexibility during price negotiations.
In general, the lead time for sheet metal fabrication varies depending on factors such as the complexity of the project, production quantity, and the supplier’s workload. A typical lead time ranges from approximately one to three weeks. For small-lot production or simple sheet metal components, delivery can often be completed within a few days to one week. However, projects involving complex fabrication processes or high-volume production may require two weeks or more.
Allowing sufficient lead time can not only help achieve more favorable pricing through negotiation but also improve the efficiency of communication and coordination with the supplier.
Conclusion
A sheet metal fabrication quotation is not only the first step in selecting the right supplier but also an important tool for controlling unnecessary costs. The basic cost components of a quotation typically include「material cost」,「processing cost」, and「special processing cost」．The final quotation is influenced by factors such as the fabrication method, production quantity, and the type and extent of any special processing required.
To reduce sheet metal fabrication quotation costs, it is important not only to obtain quotations from multiple suppliers but also to provide design data in the format supported by the selected supplier and allow sufficient lead time whenever possible.
Agency Assist Vietnam specialize in prototype development and low-volume production of sheet metal products. For examples of our fabrication projects, please visit the page below.
Example of sheet metal fabrication, laser cutting, and welding products
If you are considering sheet metal fabrication services and would like to discuss costs, technical requirements, or manufacturing options, please feel free to contact us using the information below.
At Agency Assist Vietnam, our professional sales team handles the entire procurement process on behalf of our customers, providing a convenient and hassle-free experience!
With more than 30 years of procurement experience and a network of more than 100 partner manufactures, Agency Assist Vietnam can source a wide range of parts through a one-stop solution, from preparing materials, processing to surface treatment, helping customers achieve greater efficiency and cost-effectiveness.
We support order from single-piece to low-volume and high-mix production.
All products are inspected by our in-house quality control team before delivery to ensure consistent quality.
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