Grade 70 Carbon Steel Strip: What to Check for Thin Elastic Parts
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Grade 70 high-carbon steel strip is often used for thin elastic part blanks. Purchasing should distinguish grade from delivery state and check edge, thickness tolerance, and uncoiling method to match forming or direct processing routes. Jiangsu Gaozhen handles enquiries by grade, dimensions and processing requirements.
70#: material and applications
Grade 70 is a high-carbon steel listed by Gaozhen as carbon-steel strip. It can be discussed for thin elastic parts, whose working behaviour depends on incoming condition, geometry and later processing. Strip form can support blanking, cutting or forming, but different delivery conditions do not necessarily suit the same operations.
If forming precedes heat treatment, confirm the incoming condition needed for forming. If strip with specified properties is used, assess fabrication in that condition. State grade and condition separately, followed by gauge and edge requirements, to define the material order.
Typical Parts and Processing Routes
Thin elastic parts typically include contact springs, locating clips, and clamp liners. Processing routes fall into two types: form first then heat treat, or specify hard state for direct punching, shearing, or roll forming. The form-first route requires sufficient ductility in the delivered state for stamping, bending, or rolling, followed by heat treatment to the agreed mechanical condition; check edge quality, thickness tolerance, and surface condition to avoid forming cracks. The hard-state route uses existing strength for direct punching, rolling, or bending; focus on hard-state property range, rolling curvature, and springback tendency. Discuss uncoiling method with the supplier, as coil diameter, weight, and packaging affect smooth uncoiling; assess uncoiling tension and leveling needs based on equipment conditions without preset parameters.
Purchasing Details and Verification Reasons
When purchasing Grade 70 strip, first specify delivery state—hard, soft, or intermediate—in the order. Grade and state are separate; Grade 70 alone does not guarantee hard material. Check thickness and width tolerances; thin elastic parts are sensitive to thickness consistency, and excessive tolerance affects assembly and elasticity. Specify edge type—sheared or rounded—and discuss burr and crack tendency at ordering. Coil curvature and diameter affect flatness after uncoiling; state requirements based on subsequent processing. Evaluate uncoiling method with equipment and coil weight to avoid deformation from forced uncoiling. Before substituting with C1085 or similar, verify forming and elasticity through trials.
FAQ: Does 70# Alone Mean Hard Material?
Grade 70 identifies the grade, while a hard condition is a delivery requirement; the name alone does not establish hardness. State condition, property range, tolerances and edges in the enquiry. If test samples exist, identify whether they represent incoming material, a formed part or a treated part so results correspond to the order.
70# dimensions and supply enquiry
The Gaozhen 70# 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 carbon strip, provide blank dimensions, delivery condition and later processing. Distinguish stock dimensions from finished dimensions where grinding, forming or treatment follows.
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 70# and other grades as separate items with their own specifications.
Product catalogue: https://gaozhenmetal.com/en/products/
Enquire about 70# at Jiangsu Gaozhen
For a 70# enquiry, prepare the following information so the business team can review supply and processing against the actual component.
Material and dimensions: 70#, drawing revision or specified requirements, gauge and tolerance, width, and cut length for sheets.
Project conditions: raw stock or blanks, delivery condition, blank orientation and later processing.
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 70# article to help identify the product under discussion.
The business team confirms pricing, available specifications, stock and delivery against the enquiry.