Metallurgical examination of metals (alloys) is carried out in order to detect metal particles and traces of metallization at objects, to study the qualitative and quantitative composition of metals and alloys and products from them, to establish the technology and time for the manufacture of products from metals and alloys, their operating conditions, modifications associated with circumstances of the event.
The objects of metallurgical expertise are very diverse:
- steel products and their blanks: home-made and factory-made knives, daggers, daggers, brass knuckles and other steel objects serving as instruments of crime, their fragments, debris;
- fragments and details of explosive devices, shells, mines;
- parts of destroyed parts of vehicles and other mechanisms;
- particles and sawdust of locking and signaling devices;
- wire;
- cable products, metal pipes, metal hoses and their fragments;
- articles made of precious metals and alloys, jewelry, native gold;
- traces of metallization;
- products and parts thereof made of non-ferrous metals for household use (dishes, garments, etc.) and much more.
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Objects of metallurgical expertise are seized in almost all categories of criminal and civil cases and can be objects of research not only for this kind of expertise, but also for complex metallurgical, other classes and types of expertise: trasological, electrical, fire-technical, ballistic, explosive, autotechnical. Metallurgical expertise is in demand by the customs authorities for foreign trade operations. / P>
The most common diagnostic questions are:
- what metal, alloy this item is made of (fragment);
- what is the brand of this metal, alloy; what is the scope of this metal, alloy;
- whether there is a metal coating on the presented object;
- what are its composition and purpose; whether there are metal particles on the carrier object; what is their composition; for the manufacture of what household products this metal could be intended;
- whether there are traces of metallization on the carrier object and what composition; what is the source of their origin; the object of what shape and size they could be left;
- whether the metal (alloy) presented for research is precious; what is the percentage of components in it and what sample does it correspond to; whether this gold is native or industrial; whether this piece of jewelry is made of native or industrial gold; from which deposit this native gold originates;
- what is the method of manufacturing this product; what processing it was subjected to; how long the object was oxidized (rusty); what are the causes and mechanism of destruction of this metal object (node, part);
- whether a metal coin or medal is counterfeit; what alloy of them and in what way (for example, casting into a non-metallic or metallic form, stamping using a matrix and a punch made by engraving, etc.) it was made;
- whether there are traces of melting on the presented metal objects; whether the melting of cable products (electrical wires and cables), metal pipes and metal hoses, electrical panel housings and other products occurred as a result of external thermal effects or emergency operation of the power grid; if reflow occurred due to emergency mode, then under what conditions (for example, before the fire: room temperature and the absence of combustion products in the air, or during the development of a fire: in conditions of high temperature and smoke);
- how is this metal object divided into parts; whether a thermal cutting device was used for this, the type of this device; what welding consumables were used for cutting; what was the qualification of the person who performed the electric arc (oxy-fuel) cutting.
Identification issues within the framework of the metallurgical expertise include:
- whether the metal or alloy from which the products and comparative samples are made (for example, a ring and an ingot of gold) have a common group affiliation in composition;
- whether a metal product (fragment) and comparative samples have a common group affiliation in terms of manufacturing and operation features;
- whether this object and comparative samples were made from the same alloy, steel grade;
- whether this metal fragment is part of this product (a metal particle removed from the victim's body and a knife, a plate with a number and a car body, etc.);
- whether this object is made from a specific metal object (a knife blade from a given steel plate, a crown from discovered industrial gold);
- whether the compared metal objects belong to a single source of origin: to the products of one plant (for example, sheets of roofing iron), a single batch, a single mass (native gold and gold particles on a microbalance);
- at the same or different deposits, gold was mined, seized from several suspects (or is this native gold mined at a certain deposit, is this jewelry made of gold from a certain deposit).
Microparticles of metals and alloys and traces of metallization (in combination with other objects) can be used to establish the fact of contact interaction of objects.
For example, when conducting a metallurgical examination of fused wires, the metallurgical examination establishes the conditions for the formation of metal fusion; in combination with the electrical one - issues related to the causes of emergency operation of the power grid are resolved, and in combination with the fire-technical one - the presence of a cause-and-effect relationship in the emergency mode in the power grid, conductor melting and fire
As part of the metallurgical expertise, small permanent magnets are used to detect microparticles of ferrous metals. Microparticles of metals and alloys and traces of metallization are removed together with the carrier object. Fragments of electrical wiring containing reflow are marked, the places of their removal are indicated on the electrical diagram of the object and its plan.
To carry out a metallurgical examination, metal objects are each packed separately in paper bags or cardboard boxes and supplied with explanatory notes. If there are foreign deposits on them, for example, blood, or objects are damp (the knife is removed from the reservoir), they must be dried at room temperature before packing. Sealed packaging of wet metal objects or objects with biological layers, for example, in plastic wrap, is highly undesirable, since metal corrosion and decomposition (decay) of layers may begin.
Examination of metals and alloys
Service (for 1 sample) | Deadlines | Price without VAT* |
X-ray fluorescence analysis | ||
X-ray fluorescence spectrometry (XRF) | up to 4 days | 44 USD |
X-ray fluorescence spectrometry (XRF, without issuing a protocol) | up to 2 days | 23 USD |
Sample preparation for XRF mechanical | up to 3 days | 44 USD |
Sample preparation for XRF with annealing (2 samples) | up to 7 days | 81 USD |
Determination of alloy grade (alloying + carbon + grade) | up to 7 days | 102 USD |
Determination of alloy grade (alloying + carbon + grade, without issuing a protocol) | up to 4 days | 84 USD |
Determination of the carbon content (AN-7529, 0.03-99.99) | up to 7 days | 93 USD |
Atomic emission analysis | ||
Inductively Coupled Plasma Atomic Emission Spectrometry (ICPE, >5 ppm, per sample) | up to 14 days | 105 USD |
Qualitative analysis of all elements (ICPE, screening, >5 ppm) | up to 14 days | 105 USD |
Quantitative analysis of one element (ICPE, >1-10 ppb, for 1 element) | up to 14 days | 140 USD |
Sample preparation for ICPE | up to 14 days | 40 USD |
Analytical chemistry | ||
Methods of analytical chemistry, simple method | up to 7 days | 130 USD |
Methods of analytical chemistry, complex technique | up to 14 days | 267 USD |
X-ray diffraction | ||
Powder X-ray diffraction (XRD) | up to 14 days | 151 USD |
Sample preparation of solid or liquid samples for XRD | up to 3 days | 44 USD |
Coating expertise | ||
Coating thickness determination (ISO 2808): | ||
magnetic induction method (10 points, 3-5000 microns) | up to 5 days | 56 USD |
eddy current method (per 1 sample, 10 points, 5-2000 µm) | up to 5 days | 51 USD |
metric method (5 points, 10-2500 microns) | up to 3 days | 47 USD |
drip method (5 points, from 2.5 µm) | up to 5 days | 74 USD |
XRF method (ISO 3497, 1 point, from 0.01 µm) | up to 4 days | 44 USD |
gravimetric method (arbitration, 3 points, no limit) | up to 7 days | 144 USD |
Sample preparation (removal of coating, up to 10 points) | up to 7 days | 28 USD |
Thickness measurement | ||
Thickness by ultrasonic method (per 1 sample, 5 points, 0.8-300 mm) | up to 7 days | 56 USD |
Thickness by metric method (per 1 sample, 5 points, 0.01-25.0 mm) | up to 7 days | 47 USD |
Measurement of roughness | ||
Surface roughness (per 1 sample, 2-300 µm) | up to 7 days | 49 USD |
Surface roughness (per 1 sample, Ra 0.005-16 µm, Rz 0.02-160 µm) | up to 14 days | 460 USD |
Metal hardness measurement | ||
Hardness on a stationary device (HB, HRC, HRB, HV) (per 1 sample) | up to 14 days | 86 USD |
Hardness on a portable device (ASTM A956) | up to 7 days | 63 USD |
Microhardness (per 1 sample, 5 injections) | up to 14 days | 95 USD |
Preparation of standard samples for mechanical testing | up to 7 days | 123 USD |
Mechanical testing of metal and alloys | ||
Mechanical test for abrasion (first hour) | up to 7 days | 37 USD |
Mechanical test for abrasion (every subsequent hour) | up to 1 day | 5 USD |
Mechanical tensile testing of samples (2-5 samples, до 200 kН) | up to 14 days | 160 USD |
Mechanical testing of samples for bending (2-5 samples) | up to 14 days | 160 USD |
Mechanical tests of samples for compression (2-5 samples) | up to 14 days | 160 USD |
Impact test at room temperature (2-5 samples) | up to 14 days | 133 USD |
Impact testing at low temperatures (from 0 to -80 °С, 2-5 samples) | up to 14 days | 153 USD |
Preparation of standard samples for mechanical testing | up to 14 days | 153 USD |
Metallographic studies and SEM | ||
Metallographic study of the structure (preparation, etching, grain, structure) | up to 14 days | 251 USD |
Electron micrograph + quantitative analysis of the composition (SEM EP-XRF, up to 5 points) | up to 14 days | 156 USD |
Sample preparation for microphotography (cutting, polishing, grinding, drying, vacuuming, deposition) | up to 14 days | 70 USD |
Flaw detection of metals and alloys | ||
Capillary control (first dm2) | up to 7 days | 74 USD |
Capillary control (each subsequent dm2) | up to 7 days | 16 USD |
Magnetic particle inspection (MPD, first dm2) | up to 7 days | 100 USD |
Magnetic particle inspection (MPD, each subsequent dm2) | up to 7 days | 33 USD |
Visual-optical control of joints (first line) | up to 7 days | 49 USD |
Visual-optical control of joints (each subsequent l.m.) | up to 7 days | 19 USD |
Visual-optical control of the base metal (first m2) | up to 7 days | 49 USD |
Visual-optical control of the base metal (each subsequent m2) | up to 7 days | 19 USD |
Ultrasonic flaw detection of joints (first line) | up to 7 days | 67 USD |
Ultrasonic flaw detection of joints (each subsequent r.m.) | up to 7 days | 19 USD |
Base metal ultrasonic testing (first m2) | up to 7 days | 67 USD |
Ultrasonic flaw detection of the base metal (each subsequent m2) | up to 7 days | 21 USD |
Determining the causes of damage and breakdowns | ||
Fractographic analysis of fractures (for 1 fracture) | up to 14 days | 226 USD |
Determining the causes of damage (for 1 question) | up to 14 days | 226 USD |
Study of bank bullion | ||
Inspection of the metal surface for compliance with the sample (XRF) | up to 4 days | 44 USD |
Checking the homogeneity of the metal (ultrasound) | up to 7 days | 56 USD |
Checking the density of metal (hydrostatics) | up to 3 days | 47 USD |
other services | ||
Compliance with certificates and other documents, confirmation or refutation of brand conformity (without the cost of brand identification) | up to 14 days | 35 USD |
Radioactivity level (gamma and beta background) | up to 3 days | 35 USD |
The prices are approved by the director of LLC "In Consulting" 02.11.2024. Deadlines are indicated in working days
For a free consultation, you can use On-line consultation, or call us or write to the messengers.For information about the cost of services go to Tariffs or place Application for Services.