High Strength Steel Stamped Parts

Name: High Strength Steel Stamped Parts
SKU: 128

High Strength Steel Stamped Parts from XIAYI draw an octagonal flange and double-step cavity in one single mold from ST14 steel with 40 percent elongation. Sourced from China with spectrum-checked coils, eight sides share the clamp so nothing ever rotates loose.

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Product Description

The High Strength Steel Stamped Parts kit — an octagonal limit flange plus a double-layer step holding cylinder — is fully deep-drawn in one single mold. Eight uniform flat sides interlock with matching octagonal grooves in the sheet metal, sharing clamping pressure around the full circumference: no single point to collapse, no edge to deform, no low-frequency resonance from bushing rotation.

Why Octagonal Beats Round

Design Element	Engineering Value
Octagonal multi-sided interlocking flange	Eight sides evenly share clamping pressure — no local collapse, permanent anti-rotation
Double-layer graded step cavity	Two step platforms bear axial preload and lateral impact separately — bidirectional force diversion
Smooth arc transitions inside and out	No right-angle stress zones — minimal micro-crack risk during stamping and in service
One-mold seamless forming	No weld corrosion, no fatigue fracture line, closed cavity blocks water, silt and salt

Material Grades — Choose by Duty

Grade	Substrate Performance	Duty
ST14 deep-drawing steel	Fracture elongation ≥ 40%, no brittle cracking, excellent vibration fatigue resistance	SUV, off-road, coastal, mountain full-load cargo
ST12 cold-rolled steel	Sufficient formability for regular city pavement load	Family cars, short-range urban EVs, dry inland regions
Recycled scrap steel	Elongation below 25%, laminations and pores	Rejected — flange edges break, cylinder cracks on impact

Micron-Level Dimensional Standards

Octagonal side symmetry ±0.02 mm — every side's length and plane height unified, zero gap against sheet metal grooves
Central hole concentricity ≤ 0.025 mm — piston rod runs centered, no eccentric oil seal leakage
Double-step wall thickness uniformity ≤ 0.02 mm — no thin zones under mountain lateral squeeze
Flange end flatness ≤ 0.02 mm — full contact, no unilateral warpage or positioning shift
Burr-free inner walls, step corners and flange edges — safe for buffer rubber and rod chrome coating

FAQ

Q: Our round bushings rotate loose over time. Does the octagon actually fix that?

A: Yes — rotation requires the flange to turn, and eight engaged sides make turning a full-circle effort shared across the whole perimeter. With sheet-metal grooves matching our ±0.02 mm symmetry, the interlock is permanent.

Q: Is one-mold forming a real advantage over progressive lines?

A: For this geometry, yes — a single mold draws flange and cylinder in one stroke, so concentricity is native rather than accumulated across stations. It is the tightest possible natural alignment.

Switch to the octagonal interlock — request a sample with groove-matching spec

Ningbo XiaYi Electromechanical Tech Co., Ltd. single-mold-draws octagonal flange kits in ST12/ST14. Send your sheet metal groove drawing for an interlock-matched proposal.

About XIAYI high-strength forming: drawing an octagonal flange and stepped cavity in one mold demands high-ductility steel and precise blank-holder control — exactly why the ST14 grade and elongation sampling discipline exist on this line.

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Contact Info

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Address

No.209 Lane 520 Tongning Rd,Qianjiang Street,Jiangbei District, Ningbo City, Zhejiang Province, China
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Tel

+86-13586885132
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Email

sales@xiayiparts.com

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Why Global Buyers Choose Ningbo Xiayi:
✓ IATF 16949 Certified — Defect rate strictly controlled below 0.1%.
✓ Full-Category Supply — Pistons, rods, springs, stampings & rubber parts.
✓ R&D Support — Custom powder metallurgy formulas & 7-10 day rapid prototyping.
✓ Proven Capacity — 50 million core pistons produced annually for global OEMs.

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