Shipping Records - 18NiC300 - ASTM A538 Maraging steel bar Export to France - Lork Group

Our quality inspection process is safeguarded by a dual-stage system comprising both initial and secondary inspections. The preliminary inspection for every shipment encompasses five fundamental checks: specifications, quantity, tolerances, surface quality, and packaging. For example:

Dimensional Tolerances: We used a micrometer to measure the thickness and width of the 18NiC300 maraging steel bars at multiple points. Simultaneously, we carefully inspected the edges to ensure they were free of burrs. In cases where slight burrs were present, we lightly sanded the cut surfaces.

Surface Quality: 18NiC300 maraging steel bars is susceptible to scratches, dents, and oil stains. Upon unpacking, the leading and trailing ends of the bar are subjected to a thorough inspection.

The second round of re-inspection comprises 3 to 6 specific data tests—such as chemical composition analysis, mechanical property testing, hardness testing, and specialized examinations. Adhering to the principle of "grounding operations in standard protocols and relying on the proper use and sterilization of testing instrumentation," multiple rounds of random sampling and data cross-verification are conducted to ensure the "correctness" of the material.

Chemical Composition Report: Spectroscopic Analysis Report. The key parameters monitored include: Nickel (Ni) content 18.00–19.00%; Chromium (Cr) content 0.50–0.80%; Molybdenum (Mo) content 4.60–5.20%; Cobalt (Co) content 8.50–9.50%; Iron (Fe) content 17.0–20.0%; as well as other trace elements.

Note: The cobalt content is a defining characteristic of this specific material grade, distinguishing it from low-cobalt or cobalt-free alternative grades. Cobalt significantly enhances the aging response rate and peak strength. As indicated by the spectrometer analysis data shown in the image above, the cobalt content meets the required specifications!