SUP7 Spring Steel Strip: Converting Japanese Leaf Spring Drawings into Purchasing Requirements
Published
For leaf springs in SUP7 cold-rolled strip, retain delivery condition, units and forming orientation from the original drawing. Relating drawing revisions to sample stages helps assess the fit of newly manufactured parts. Jiangsu Gaozhen handles enquiries by grade, dimensions and processing requirements.
SUP7: material and applications
SUP7 is a Japanese spring-steel grade listed by Gaozhen as cold-rolled sheet and strip. When converting an older leaf-spring drawing into a purchasing list, check both the material designation and part form. SUP7 alone does not define the incoming treatment condition; annealed or another agreed condition needs separate identification.
Revisions, annotations and process notes on older drawings can also contain material requirements. Relate them to the current revision before confirming gauge, width and forming orientation. If drawing and enquiry units differ, retain the original values and conversion alongside the tolerance requirements.
Material-category reference: https://www.nipponsteel.com/steelinc/pdf/B001en.pdf
Leaf Spring Parts and Processing Route
A leaf spring may contain holes, bends and local features, with strip width determined by the developed outline and nesting. Provide part width, length and quantity, and state whether blanks are processed individually or fed continuously from coil so slitting and packaging can be discussed.
Make trial parts through the actual blanking, forming and post-treatment route before measuring finished requirements. Checking an untreated flat blank does not establish final assembly dimensions or working travel. Record drawing orientation, holes and measurement stage with the samples to compare old and newly made parts.
Purchasing Details and Verification Rationale
When ordering, write grade SUP7, condition, thickness and width, thickness units, and forming direction into the purchasing requirements item by item, with relevant drawing pages attached. Verify whether the sample is before or after treatment: a treated sample's bending behavior does not directly represent incoming material, and purchasing needs to know which step the sample corresponds to. If the drawing lists only the grade without condition, confirm with the drawing owner before inquiry. Specify packaging, slit width, and coil weight according to processing equipment capacity to avoid re-slitting after arrival. Whether a similar grade can be directly substituted requires approval from the drawing owner; purchasing should not decide on its own. These details are stated so quotations and samples are compared on the same basis, reducing back-and-forth.
FAQ: Can a Similar Grade Be Directly Substituted?
Purchasing cannot decide this alone. Even if a similar grade has a close strength level, condition, thickness tolerance, and surface condition may differ, directly affecting bending and springback. The correct approach is to submit the original drawing material note, condition, and part service conditions to the drawing owner for approval of substitution; after approval, samples should still be confirmed along the actual bending and post-treatment route.
SUP7 dimensions and supply enquiry
The Gaozhen SUP7 product page lists these catalogue dimensions: Thickness range: 0.2-6.0 mm; Width range: 8-350 mm. These values support specification discussions; confirm the required combination of gauge, width and condition for the material.
For spring strip, discuss the grade, delivery condition, width and process route. Identify whether the order concerns raw stock or processed blanks to define dimensions and delivery scope.
Product details: View related product details
Products and processing enquiries at Jiangsu Gaozhen
Jiangsu Gaozhen Trading Co., Ltd. handles trading and processing coordination for steel sheet, coil and related metal materials. Customers can find a grade and discuss drawings, service conditions and manufacturing requirements.
The product range includes cold-rolled, hot-rolled, galvanized and other coated, pickled, spring-steel, carbon-steel and stainless sheet or coil, plus zinc-titanium / zinc-copper-titanium and copper-titanium alloys. For a mixed-material project, list SUP7 and other grades as separate items with their own specifications.
Product catalogue: https://gaozhenmetal.com/en/products/
Enquire about SUP7 at Jiangsu Gaozhen
For a SUP7 enquiry, prepare the following information so the business team can review supply and processing against the actual component.
Material and dimensions: SUP7, drawing revision or specified requirements, gauge and tolerance, width, and cut length for sheets.
Project conditions: strip delivery condition, edges and feed requirements, later treatment and component acceptance.
Purchase plan: trial or batch requirement, quantity, delivery destination and requested timing.
Choose “Send enquiry” in the floating assistant, complete product, dimensions, quantity and contact details, confirm consent and submit. A receipt reference confirms that the form has been saved in Gaozhen’s website inbox. A chat message alone is not a submitted enquiry form.
Alternatively, contact Wang Dawei at +86 13861182855 or dawei5373@126.com. Mention this SUP7 article to help identify the product under discussion.
The business team confirms pricing, available specifications, stock and delivery against the enquiry.