Audit Spotlight Structural Steel Custom Fabrication

Custom A36 Steel Plate Sourcing for Hydraulic Press Manufacturing

Macrodyne Presses & Automation needed a verified Chinese steel fabricator capable of producing custom-dimensioned, ASTM A36-compliant structural steel plates for their hydraulic press frames. Luckee conducted full on-site verification — from raw material coil provenance to live XRF chemical testing on the floor.

Macrodyne Presses & Automation (Canada)
ASTM A36 Structural Steel Plate
CNC Flame Cutting + Surface Machining
On-Site XRF Chemical Verification
Audit Verdict
APPROVED
A
Material Compliance
A
Cutting Capability
A−
Dimensional Accuracy
B+
Documentation
99.74% Fe
Iron content — XRF confirmed
0 Critical
No critical findings on audit
200mm+
Max plate thickness observed
Wuxi
Mill-direct coil supply confirmed

What Macrodyne Needed Confirmed

Macrodyne Presses & Automation manufactures heavy-duty hydraulic presses and automation systems for industrial clients across North America. Their press frames and platens require large-format, custom-dimensioned structural steel plates — often exceeding 150mm in thickness — with strict dimensional tolerances and verifiable ASTM A36 material compliance.

Finding a Chinese fabricator capable of delivering at this specification, with genuine mill-traceability and reliable custom cutting capability, requires more than a supplier profile. Macrodyne engaged Luckee to physically verify the supply chain from raw steel coil to finished custom-cut plate — confirming that the material, the fabrication process, and the documentation were all genuinely in place.

The audit covered three stages of the supply chain in a single visit: the raw material yard (Wuxi steel coil inventory), the CNC flame cutting workshop, and the finished custom plate warehouse — with live XRF chemical testing conducted on-site on representative samples from the production batch.

Client
Macrodyne Presses & Automation Inc. — Ontario, Canada
Material Spec
ASTM A36 structural carbon steel plate — custom dimensions
Application
Hydraulic press frames, bolster plates, platen components
Audit Scope
Raw material provenance, CNC cutting capability, XRF chemical analysis, dimensional verification, documentation review
Mill Origin
Wuxi, Jiangsu — major Chinese hot-rolled steel trading hub
Custom press frame steel plates in fabrication workshop
Custom-machined press frame plates in the fabrication workshop — including a large plate with a precision rectangular pocket, consistent with Macrodyne's press frame specifications.
Live Chemical Analysis

XRF Test Conducted On-Site — A36 Confirmed

The single most important verification for any structural steel supply relationship is chemical composition. Supplier-provided Mill Test Reports (MTRs) can be falsified, misattributed, or attached to the wrong heat. Luckee's auditor used a handheld XRF analyser directly on a representative plate from the production batch. The result: a confirmed carbon steel match with 99.74% Fe and 0.26% Mn — fully within ASTM A36 limits.

Carbon Steel — Exact Match 09/22/22 · Sample #11
Fe
99.74%
spec: 98.25–100
Mn
0.26%
spec: 0.00–1.50
Not Detected (ND)
Cr
ND < 0.14% — no chromium alloying
Ti
ND < 0.30% — no titanium alloying
V
ND < 0.11% — no vanadium alloying
Co
ND < 0.42% — consistent with plain carbon steel
✓ Live On-Site Test
XRF handheld analyser showing A36 chemical test results

What the Audit Verified Across the Supply Chain

Six findings from the on-site visit — covering raw material origin, fabrication capability, dimensional compliance, and documentation quality.

Raw Material
Mill-Direct Steel Coil Supply — Wuxi Yard Inspected
The raw material source was physically inspected at a Wuxi steel trading yard (gantry crane visible). Multiple hot-rolled coils with heat-stamped coil IDs (R22011622A020, R22000855A020, etc.) were observed. Heat numbers allow traceability back to the originating mill cast — a prerequisite for credible MTR documentation.
✓ Verified
Chemical Compliance
ASTM A36 Composition Confirmed by XRF
Live XRF analysis on a production-batch sample returned Fe 99.74% and Mn 0.26% — both within ASTM A36 specification. No alloying elements (Cr, Ti, V, Co) detected, consistent with unalloyed structural carbon steel. Result classified by the instrument as "Carbon Steel — Exact Match".
✓ XRF Confirmed
CNC Cutting Capability
BTHG CNC Flame Cutter — Multi-Torch, Active Production
A BTHG multi-torch CNC flame cutter was observed in active production cutting thick steel plate. The machine was cutting custom profiles with visible chalk markings of order dimensions on the plate face. Cutting arc and slag characteristics confirmed operation on heavy-gauge structural plate (est. 50–150mm). Nesting optimization visible in completed batch.
✓ Verified
Custom Profiles
Complex Custom Profiles and Pockets — Confirmed In-House
Multiple finished plates with precision-machined rectangular and square pockets were observed on the workshop floor — geometries consistent with hydraulic press frame and bolster plate requirements. Surface finishing quality on machined faces was inspected: consistent tool marks and flatness observed. Large-format plates (est. 2000×1800mm+) present and dimensionally marked.
✓ Verified
Dimensional Verification
Plate Markings Cross-Checked Against Order Dimensions
Chalk and paint markings on finished plates (e.g. "2015×180×360" and "4671" job numbers visible) were cross-referenced against the customer order parameters. Thickness of stacked plates was measured. Flatness of machined surfaces was assessed visually and by straightedge. Dimensional deviation was within acceptable tolerance for press frame applications.
✓ Verified
Documentation
MTR Provision — Confirmed Available, Format Improvement Recommended
Mill Test Reports were available for the production heat and were traceable to the coil heat numbers observed in the raw material yard. MTR format and content met minimum ASTM A36 documentation requirements. Luckee recommended standardising MTR delivery in English alongside Chinese originals, and including the third-party XRF verification reference in the shipment documentation package.
⚠ Minor Improvement Noted

The Supply Chain Through the Auditor's Lens

From steel coil yard to finished custom plates — every stage documented on the day of the audit. Click any image to enlarge.

Audit Verdict

Supplier Approved for Macrodyne's A36 Steel Plate Programme

No critical findings were recorded. The factory demonstrated genuine CNC flame cutting capability for heavy-gauge structural plate, confirmed ASTM A36 chemical compliance via live XRF analysis, and showed a credible raw material traceability path from Wuxi mill coils through to finished custom plates. MTR documentation was available and traceable. One minor recommendation was made regarding English-language MTR formatting for Canadian import documentation. Macrodyne was advised to proceed to a trial order with mandatory third-party inspection of the first shipment.

Overall Result
APPROVED
A
Material Compliance (XRF)
A
CNC Cutting Capability
A−
Dimensional Accuracy
B+
MTR Documentation

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