Titanium plate quotation difference of 50 yuan/kg, behind 3 truths

Last month, I assisted a Jiangsu customer to carry out titanium material comparison work, with the same specification of 10mm thick TA2Titanium PlateThe three suppliers offered quotations of 185 yuan, 215 yuan and 235 yuan per kilogram respectively, with a price difference of up to 50 yuan/kg.The customer is very confused, the same brand specificationsTitanium PlateWhy is the price gap so big?To this end, we visited three production plants, Three core causes of price difference were found., Combined with Baoji China titanium grain titanium industry many years of practical operation experience, Share with chemical equipment purchasersTitanium PlateKey points of pit avoidance for procurement.

Truth 1: Raw materials are inferior The manufacturer with the lowest quotation adopts the production mode of mixed melting of recycled titanium and new materials, titanium scrap, titanium scrap recycling, Then mixed with 30%-50% new titanium sponge to produceTitanium Plate。this kindTitanium PlateImpurity content is high, iron, oxygen element index easy to exceed the standard;The ductility of the material is poor, and it is easy to crack when deep drawing is carried out.The actual service life of the equipment compared to the production of new raw materialstitanium plate30%-50% reduction.Although the brand number on the warranty is still marked TA2, the actual properties of the material have shrunk significantly. Identify these blended recyclablestitanium plateapproach to, Supplier required to provide SGS, Third party test report such as Puni, Focus on iron verification, oxygen, nitrogen, Hydrogen impurity element index, Reclaimed material preparationtitanium plateIron content is usually high.

Truth 2: Negative thickness deviation GB/T 3621-2007titanium plateThe allowable deviation of thickness is clearly specified, and the deviation range of ordinary grade plate is ±0.3-1.0mm.Some suppliers will produce according to the lower limit of deviation, Sign ID 10mm, The actual thickness is only 9.2mm or even 9.0mm.The actual weight of the plate is reduced by 8%-10% compared with the theoretical weight, which is also a hidden price reduction means. Simple calculation: one ton of 10mm markedtitanium plateIf the actual thickness is only 9 mm, the actual supply weight is reduced by 100 kg.According to the price of 200 yuan per kilogram, this supplier alone can reduce the cost by 20,000 yuan. identification methods, After arrival, use a micrometer to measure the thickness at multiple points, Measure at least four corners of the plate and the center of the plate, The supplier may also be required to provide thickness measurement records in advance.

Fact 3: Simplification of the production process Titanium plate complete production process includes melting, forging, hot rolling, annealing, pickling, finishing six procedures.Low-cost suppliers will cut two key processes, Eliminate annealing process, The residual stress inside the plate cannot be eliminated, sheet flatness difference, Easy deformation in subsequent processingThe pickling process is omitted, and the oxide scale remains on the surface of the plate, which affects the subsequent welding and corrosion resistance. Identify simplified process products, Request process flow cards and heat treatment records from suppliers, Regular special material manufacturers can provide complete production process files.

Combined with the field investigation experience, three suggestions for avoiding pitfalls in procurement are summarized: First, verify raw material qualification, Ask the supplier for proof of source of sponge titanium raw materials and third-party material inspection report, Ensure traceability of raw materials Second, do a good job of thickness acceptance, Multi-point measured thickness with micrometer when goods arrive at the factory, Carefully select suppliers who settle only on theoretical weight Third, verify the production process, Conditions permit site visits to factory production lines, Or ask for production process information, key validation annealing, Pickling process is complete.

Judgment of reasonable quotation interval of titanium plate Taking TA2 hot rolled titanium sheet with thickness of 10mm as an example to calculate cost composition, the raw material cost of titanium sponge is about 100 yuan per kilogram, forge, hot rolling, anneal, the overall proces cost of pickling is about 70-90 yuan per kilogram, The reasonable quotation range of the market is 180-220 yuan per kilogram. Quotation is less than 170 yuan per kilogram, need to be alert to raw materials mixed with recycled materials or production process cuts;Quotations higher than 250 yuan per kilogram, generally additional brand premium or customized processing costs.

GB/T 3621-2007: Acceptance criteria for titanium sheet Titanium plate specification quick lookup table: 10 common thicknesses How to choose titanium?3-Step Decision Making 5 questions to ask when purchasing titanium

For the same TA2 titanium plate, why is the quotation gap so big? Although they are labeled TA2,, But different manufacturers of raw materials (recycled materials/new titanium sponge), thickness negative deviation control, Production process integrity and brand premium, Will cause huge price differences, The price difference of some scenes can reach more than 50 yuan/kg.

How to judge whether the supplier of titanium plate is reliable? Five indicators can be verified, Complete third-party inspection report, Raw material traceability, Complete production process, Material Quality Assurance Specification, Industry customers have a good reputation, These conditions are recommended to be met simultaneously.

Can low-cost titanium plates be put into production? Low-cost sheets can be put into use in the short term, but the service life of the material will shrink significantly.If the purchase price is 30% cheaper, the life of the plate may be shortened by 30%-50%, and the overall cost will be higher in the full life cycle of 5 to 10 years.

How to accept the thickness of titanium plate arrival? Multi-point measurement with micrometer, Select at least 5 points at the four corners and the center point of the plate, Retain measured data, Check the thickness deviation according to GB/T 3621-2007.

What are the identification methods for recycled titanium plates? There are three methods in total: check the third-party test report to observe the impurity content;Observe the fracture of the material, and the grain structure of the recovered material is coarse;Check the surface of the plate, the surface finish of the titanium plate produced by recycled materials is relatively poor.