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Precision steel components start long before the CNC machine. The substrate must be flat, stress-free, and dimensionally consistent. Otherwise, even the best machining shop produces parts that move after cutting. Consequently, precision component builders rely on suppliers who deliver controlled stock. Here is how we support one such customer.

The Customer Challenge

A European equipment builder needed valve bodies machined from 316L stainless plate. The parts had to hold ±0.02 mm tolerance. Furthermore, they needed flatness within 0.05 mm across the 300 × 400 mm face. Previous suppliers delivered mill plate that moved during machining. Consequently, the customer scrapped 15% of parts after final inspection.

What We Changed

We supplied plate in a different condition:

• Ground both sides to Ra 1.6 μm.
• Stress-relieved after rolling.
• Flatness held to 0.05 mm before machining.
• Cut to rough size with 2 mm stock per side.

Consequently, the customer’s CNC machined parts held tolerance on the first pass. Furthermore, scrap dropped from 15% to under 2%.

The Material Selection Logic

Precision components need the right substrate for the duty:

• Corrosion service: nickel alloys like Hastelloy C-276.
• Wear service: hardened mold steel like H13 or D2.
• Electrical service: copper plate like C11000.
• Heavy abrasion: wear-resistant plate like 400HB.

Consequently, material choice starts with the failure mode, not the price.

Products We Supply for Precision Machining

We deliver controlled stock for precision shops:

• Hastelloy C-276 Plate solution-annealed and pickled, ready for machining.
• H13 / SKD61 Mold Steel soft-annealed and pre-machined to rough block.
• 400HB Wear Resistant Steel Plate QT condition, ground on request.
• C11000 / T2 Copper Plate mill-hard tempered for busbar and connector machining.

Specify Your Tolerance

A complete order reads: “H13 plate, 50 mm × 300 × 400 mm, soft-annealed, pre-machined ±0.1 mm, flatness 0.05 mm, ultrasonic tested.” Leave out the tolerance and you receive mill stock that moves.

Get Precision-Machine-Ready Stock

Tell us your part, material spec, and required tolerance. We will confirm stock condition and quote.

• Email: vera.liang@ztwysteel.com
• Location: Xishan District, Wuxi, Jiangsu, China
• Services: cut-to-size, pre-machining, surface grinding, stress relief
• Documentation: MTC, hardness report, ultrasonic test, PMI for nickel alloys
• Tolerance: machining stock to ±0.1 mm; grinding to ±0.02 mm on request

We reply within one working day.