Description

Stainless Steel Deep Drawn Enclosures and Cups – Custom Manufacturer & Exporter India

Stainless Steel Fittings India manufactures precision stainless steel deep drawn enclosures, cups, canisters, housings, shells, cylinders, and drawn bodies from SS 201, SS 304, SS 304L, SS 316, SS 316L, SS 430, and SS 2205 Duplex in thicknesses from 0.3 mm to 6 mm. Our in-house deep drawing facility operates multi-stage hydraulic and mechanical presses with draw ratios up to 2.5:1, producing seamless, leak-proof, high-strength SS components for electrical OEMs, EPC contractors, pharmaceutical equipment builders, automotive Tier-1 suppliers, pressure vessel fabricators, and industrial product companies. Price: US$ 11.60/Kilogram.

Product Overview

Deep drawing is a sheet metal forming process where a flat SS blank is drawn into a die cavity by a punch, forming a seamless hollow three-dimensional component without material removal. Unlike welded fabrications, deep drawn enclosures have no weld seams, eliminating leak paths, stress concentrations, and surface discontinuities — critical for pressure-containing, fluid-handling, and hygienic applications. Stainless Steel Fittings India’s deep drawing capability spans single-stage shallow draws to complex multi-stage progressive redrawing with intermediate annealing for maximum draw depth.

Deep Drawn SS Instrument & Sensor Housings

Cylindrical and non-round instrument housings, sensor protection tubes, thermowell blanks, pressure transmitter bodies, transducer cups, load cell housings, and flow meter enclosures are deep drawn from SS 304 and SS 316L to dimensional tolerances of ±0.1 mm. Thin-wall drawn tubes with controlled wall thickness are produced by ironing operations on hydraulic presses. These components are used in oil & gas instrumentation, power plant monitoring, chemical process control, and precision measurement equipment where dimensional accuracy directly affects calibration and performance.

SS Deep Drawn Aerosol & Pressure Vessel Bodies

Seamless stainless steel aerosol can bodies, pressure vessel shells, accumulator shells, hydraulic cylinder liners, and high-pressure canister bodies are deep drawn from SS 304 and SS 316L in multi-stage processes with draw ratios up to 2.5:1. Wall thickness uniformity is controlled through ironing passes, achieving ±5% wall thickness tolerance across the drawn length. Used in fire suppression systems, medical oxygen equipment, refrigerant storage, hydraulic accumulators, and specialty gas containment where seamless construction is mandatory for pressure integrity and safety certification.

Deep Drawn Food-Grade & Pharmaceutical Containers

Hygienic stainless steel drawn containers, nested cups, pharmaceutical packaging components, ampoule bodies, cartridge shells, and food contact canisters are manufactured from SS 316L with electropolished internal surfaces achieving Ra < 0.4 μm. Drawn SS food containers meet FDA 21 CFR, EU 10/2011 food contact regulations, and 3-A Sanitary Standards. No internal weld seams mean no crevices for bacterial retention — essential for pharmaceutical API processing, aseptic filling equipment, dairy component manufacture, and beverage dispensing systems.

Automotive Deep Drawn SS Fuel & Exhaust Components

Automotive-grade deep drawn stainless steel fuel filter housings, catalytic converter shells, exhaust silencer end caps, EGR valve bodies, oil filter canisters, fuel rail end plugs, and turbocharger heat shields are manufactured from SS 409, SS 430, and SS 316L to PPAP documentation standards. Transfer press production with automated blank feeding ensures consistent part geometry across high-volume runs. PPAP Level 1–3 documentation, FMEA support, and IMDS material data submission are available for Tier-1 and Tier-2 automotive OEM qualification programmes.

Electrical & Electronic Deep Drawn Enclosures

Deep drawn stainless steel electrical enclosures, relay housings, contactor cups, solenoid valve bodies, EMI/RFI shielding cups, connector backshells, and capacitor cans are precision-drawn from SS 304 and SS 430 for electrical OEM supply programmes. Drawn enclosures with flanged openings, stepped shoulders, and integral mounting bosses are formed in compound dies combining drawing with coining operations. Used in switchgear manufacturing, marine electrical panels, railway control equipment, and industrial motor control centres where IP54 to IP68 protection requires seamless enclosure construction.

Medical & Laboratory Deep Drawn SS Components

Surgical instrument cups, laboratory crucibles, centrifuge tube inserts, autoclave containers, biopsy specimen holders, implant tooling shells, and sterilisation tray components are deep drawn from SS 316L and electropolished to Ra < 0.2 μm for implant-grade surface quality. Dimensional tolerances of ±0.05 mm are achievable on drawn diameter and height for precision instrument components. Full material traceability to EN 10204 3.1 MTCs with heat number records is maintained for medical device regulatory compliance under FDA 21 CFR Part 820 and ISO 13485 quality management systems.

Custom OEM Deep Drawn SS Parts to Drawing

Customer-supplied CAD drawings (STEP, IGES, DXF, SolidWorks) are reviewed by our tooling engineers for deep draw feasibility — evaluating draw ratio, blank size, material thinning, springback, and edge condition. In-house tooling manufacture (D2 die steel, carbide punches) eliminates external tooling dependency and reduces NPI lead times. Single-piece prototype tooling allows form verification before production tooling commitment. Volume production from 500 to 5 million parts per year with blanket order scheduling available for OEM supply programmes in USA, UK, UAE, Germany, and Southeast Asia.

Key Features

• Seamless construction — no weld seams, no leak paths, no stress concentrations
• Draw ratios up to 2.5:1; multi-stage redrawing with intermediate annealing
• Wall thickness control via ironing: ±5% wall uniformity across drawn length
• Dimensional tolerance: ±0.1 mm diameter; ±0.2 mm height (standard); ±0.05 mm fine tolerance
• All SS grades: 201, 304, 304L, 316, 316L, 430, 409, 2205 Duplex
• Surface finish: 2B, BA, No.4, No.8, electropolished (Ra < 0.4 μm), passivated
• Press capacity: 25-ton to 400-ton hydraulic and mechanical presses
• In-house tooling; PPAP, FAI, EN 10204 3.1 MTC documentation
• Food-grade, pharmaceutical, medical, automotive, and pressure vessel grades available
• Export to USA, UK, UAE, Germany, Australia, Singapore, Canada, Saudi Arabia

Seamless Deep Drawn Construction

The fundamental advantage of deep drawn enclosures over fabricated welded boxes is the absence of weld joints. Drawn components exhibit uniform grain structure throughout the cup wall, superior fatigue resistance under cyclic pressure loading, and zero internal crevices for corrosion initiation or bacterial colonisation. For pressure-containing applications, seamless drawn bodies eliminate the need for post-weld heat treatment, radiographic inspection of welds, and weld procedure qualification — significantly reducing per-part compliance costs in pressure vessel and medical device applications.

Multi-Stage Redrawing & Intermediate Annealing

Deep cups and long cylinders exceeding single-stage draw ratios are produced by sequential redrawing stages, each reducing diameter and increasing height. Austenitic stainless steels work-harden rapidly during deep drawing, requiring intermediate solution annealing at 1050–1100°C to restore ductility before subsequent draw stages. Our in-house bright annealing furnace (controlled atmosphere, no scale) allows multi-stage drawn parts with draw depth-to-diameter ratios exceeding 3:1 while maintaining surface finish integrity. This capability is essential for long sensor housings, deep aerosol bodies, and pharmaceutical ampoule blanks.

Wall Ironing & Thickness Control

Ironing operations performed after initial drawing reduce wall thickness progressively by passing the drawn cup through reducing die rings with controlled clearance between punch and die. Wall thickness uniformity of ±5% across the drawn cylinder wall is achievable, producing thin-wall tubes and canisters with precise inside and outside diameters. Ironed SS cups exhibit improved surface finish and dimensional consistency compared to unironed drawn parts — critical for sensor housings requiring consistent interference fit with inserted components, and for aerosol bodies requiring reliable seaming operations.

Hygienic Surface Finishing

Internal surfaces of drawn enclosures for food, pharmaceutical, and medical applications are electropolished per ASTM B912 to achieve Ra < 0.4 μm (food-grade) and Ra < 0.2 μm (implant-grade). Passivation per ASTM A967 follows all forming operations to restore the natural chromium oxide passive layer disrupted by forming. Chemical passivation removes free iron, forming lubricant residues, and tooling steel contamination from drawn surfaces — critical for corrosion resistance certification in marine, chemical, and food contact applications. All surface treatment operations are performed in-house with documented process controls.

OEM Tooling Design & DFM Engineering

Deep draw tooling design requires precise blank size calculation, draw ratio assessment, blank holder force optimisation, and lubrication specification to avoid tearing, wrinkling, or earing defects. Our tooling engineering team provides free Design for Manufacturability (DFM) review of customer drawings — recommending corner radii, draw depth, wall angle, and flanging features that minimise tooling complexity and cycle time. Tooling is manufactured in-house from D2 tool steel with carbide working surfaces on high-precision CNC EDM machines, achieving punch and die concentricity of ±0.01 mm for consistent dimensional output across production runs.

Quality Documentation & Traceability

Every production batch of deep drawn enclosures is accompanied by EN 10204 3.1 Mill Test Certificates traceable to the originating SS coil heat number, dimensional inspection reports (CMM or gauge), surface Ra measurement records (electropolished parts), and passivation test certificates where required. PPAP Level 1–3 documentation packages are available for automotive OEM customers. AS9102 First Article Inspection (FAI) reports are available for aerospace and defence customers. ISO 13485 quality records are maintained for medical device components requiring FDA audit trail compliance.

Technical Specifications

Material Grades & International Equivalents

Product Types & Variants

Industry Applications

Manufacturing Process

Raw SS coil or sheet is received with EN 10204 3.1 MTCs and inspected for mechanical properties and surface condition. Blanking dies cut circular or shaped blanks from sheet stock using CNC punch presses with optimised nesting for minimum scrap. Blanks are lubricated with deep draw lubricant (chlorine-free for food/pharma applications) and fed to drawing presses. First draw stages form the initial cup shape; redraw stages progressively reduce diameter and increase height. Intermediate annealing at 1050–1100°C in a controlled-atmosphere bright annealing furnace restores ductility between stages. Ironing operations refine wall thickness uniformity. Trimming removes uneven drawn edges (earing). Flanging, beading, or coining operations add functional features. Post-forming operations include deburring, passivation (ASTM A967), electropolishing (ASTM B912 for pharma/food grade), dimensional inspection by CMM, and final visual inspection before packing. Batch traceability records link each part to the originating coil heat number.

Quality Standards & Certifications

• ISO 9001:2015 – Quality Management System
• ASTM A240 / A480 – Stainless Steel Sheet and Strip
• EN 10088-2 – European SS Flat Products
• ASTM A967 – Chemical Passivation of Stainless Steel
• ASTM B912 – Electropolishing of Stainless Steel
• EN 10204 3.1 – Mill Test Certificates (all raw material)
• PPAP Level 1–3 – Automotive Production Part Approval
• AS9102 FAI – First Article Inspection for Aerospace
• ISO 13485 – Medical Device Quality Management (records available)
• FDA 21 CFR Part 820 – Quality System Regulation (medical device supply)
• 3-A Sanitary Standards – Food and dairy equipment

Why Choose Stainless Steel Fittings India

• In-house deep drawing from 25-ton to 400-ton presses — single-stage to multi-stage complex draws
• All SS grades in stock: SS 201, 304, 304L, 316, 316L, 409, 430, 2205 Duplex
• In-house tooling manufacture — rapid NPI, fast engineering changes, no external dependency
• In-house bright annealing for multi-stage high-draw-ratio parts
• Electropolishing and passivation for food, pharma, and medical grade components
• PPAP, FAI, EN 10204 3.1 MTC documentation capability
• Competitive pricing from US$ 11.60/kg; volume and blanket order discounts
• 25+ years of export experience to USA, UK, UAE, Germany, Australia, Singapore, Canada

Frequently Asked Questions

What is the maximum draw ratio achievable?

Single-stage draws achieve LDR (Limiting Draw Ratio) up to 2.5:1 for austenitic SS grades. Multi-stage redrawing with intermediate annealing extends total draw depth-to-diameter ratios beyond 3:1 for deep cups, long cylinders, and aerosol bodies.

Which SS grade is best for deep drawing?

SS 304 and SS 304L have the best deep drawability in austenitic grades due to high work hardening rate (n-value) and good elongation. SS 316L is used where corrosion requirements mandate molybdenum content. SS 430 ferritic grade draws well in shallow applications with lower work hardening.

What sheet thickness range can be deep drawn?

Standard capability covers 0.3 mm to 6.0 mm thickness. Thinner foil-gauge drawing and heavier gauge draws above 6 mm are available on hydraulic presses by quotation.

Can you supply electropolished food-grade drawn containers?

Yes. SS 316L drawn containers with electropolished internal surfaces to Ra < 0.4 μm (food grade) and Ra < 0.2 μm (pharmaceutical grade) are manufactured under enhanced cleanliness protocols with ASTM B912 electropolishing and ASTM A967 passivation. NSF 61 and 3-A Sanitary Standards compliance certificates are available.

Do you offer PPAP documentation for automotive customers?

Yes. PPAP Level 1 through Level 3 documentation packages including dimensional inspection reports, material certifications, process capability studies (Cpk), and IMDS material data submissions are available for automotive Tier-1 and Tier-2 OEM customers.

What is the tooling lead time for a new deep drawn part?

Simple single-stage draw tooling: 3–4 weeks. Multi-stage progressive draw tooling: 6–10 weeks. Prototype soft tooling for sampling is available in 2–3 weeks for initial form verification before production tooling commitment.

What file formats do you accept for custom drawings?

We accept STEP, IGES, DXF, DWG, SolidWorks (.sldprt), Inventor (.ipt), and PDF technical drawings. 3D STEP files are preferred for multi-stage deep drawn parts to allow accurate blank size calculation and tooling design.

Are mill test certificates supplied with drawn parts?

Yes. EN 10204 3.1 Mill Test Certificates covering chemical composition and mechanical properties of the raw SS coil are supplied with every order. Dimensional inspection reports and passivation/electropolishing test certificates are available for all finished parts.

Can you produce prototypes before volume production?

Yes. Single pieces to small prototype batches are produced using soft tooling (aluminium or mild steel tooling) for form and fit verification. Full production tooling is manufactured after prototype approval, ensuring correct dimensional output before volume commitment.

What secondary operations are available after deep drawing?

In-house secondary operations include trimming, flanging, beading, coining, piercing, TIG welding, passivation, electropolishing, laser marking, tapping, thread rolling, and mechanical assembly. These value-added services allow supply of complete sub-assemblies rather than loose drawn parts.

Equivalent Terms in Other Languages

Spanish: Envase embutido de acero inoxidable, Copa embutida profunda inox, Carcasa de embutición profunda, Recipiente troquelado inoxidable
Russian: Вытяжной корпус из нержавеющей стали, Глубокая вытяжка нержавейки, Стакан из нержавеющей стали, Корпус вытяжной нержавеющий
French: Boîtier embouti en acier inox, Coupelle emboutie profonde, Enveloppe en inox embouti, Corps embouti inoxydable
Portuguese: Carcaça em aço inox embutida, Copa de embutimento profundo, Invólucro inox estampado, Recipiente embutido inoxidável
Italian: Involucro imbutito in acciaio inox, Coppa imbutitura profonda, Guscio inox imbutito, Corpo imbutito inossidabile

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Request a Quote for Stainless Steel Deep Drawn Enclosures and Cups

Send your CAD drawings, STEP files, or technical specifications to Stainless Steel Fittings India for a competitive quotation on stainless steel deep drawn enclosures and cups. Price from US$ 11.60/kg. In-house tooling, DFM review at no charge, prototype-to-volume production. OEM supply programmes and export enquiries from USA, UK, UAE, Germany, Australia, and Southeast Asia are welcome. Contact us for a fast response.