Ferrous Metallurgy Industrial Criterion for Cored Wire of the People’s Republic of China

YB/T 053-2007

Ⅰ Subject Contents and Application Scope

This criterion specified product category, technical requirements, test methods, inspection rules as well as marks for package, storage and transportation and quality certificate of cored wires.

This criterion is applicable to all kinds of cored wires used in steelmaking and casting wire feeding.

Ⅱ Normative Referenced Document

The clauses in the following documents have been clauses of this criterion by referencing. Any referenced document marking date, all the followed modification bill (excluding corrected contents) or revision edition is inapplicable to this criterion. However, all parties who reached agreements in accordance with this criterion are encouraged to study whether they can use the latest versions of these documents.

GB/T 716 Carbon Structure Steel Cold-Rolled Steel Strip

GB/T 2082.1 Atomized Aluminum Powder, Part 1, Air Atomized aluminum

GB/T 2272 Ferro Silicon

GB/T 2449 Industrial Sulphur and Its Experiment Methods

GB/T 3282 Ferro Titanium

GB/T 3795 Ferro Manganese

GB/T 4138 Rare Earth Magnesium Silicon Ferro Alloy

GB/T 4153 Mixed Rare Earth Metal

GB/T 4864 Metal Calcium and Its Products

GB/T 5682 Boron

GB/T 13237 High quality Carbon Structure Steel Cold-rolled Thin Steel Plate and Steel Strip

YB/T 067 Silicon Calcium Barium Aluminum Alloy

YB/T 5051 Silicon Calcium Alloy

YB/T 5059 Low Carbon Steel Cold-Rolled Steel Strip

YB/T 5299 Asphalt Coke

YB/T 5308 Reduced Ferro Powder for Powder Metallurgy

YB/T5358 Silicon Barium Alloy

Ⅲ Classification

1. Cored wire is divided into single and composite cored wire according to composition of core material group. Single cored wire is a kind of cored wire that is packed with a kind of alloy powder or nonmetal powder. Composite cored wire is that is packed with two kinds or more kinds of alloy powder and one kind of alloy powder and non-metal powder.

Ⅳ. Technical Requirements

1. Steel strip selected for cored wire should meet the provisions of GB/T716, GB/T13237 and YB/T5059y.
2. The core powder used for cored wire should meet the provisions of GB/T2082.1, GB/T2272, GB/T244GB/T3282, GB/T3795, GB/T4138, GB/T4153, GB/T4864, GB/T5682, YB/T067, YB/T5051, YB/T5299, YB/T5308 and YB/T5358 respectively.

YB/T 053-2007

3. Physical characteristics of cored wire should meet the provisions of Form 1.

Form 1

4. For cored wire that takes other alloy powder as the core powder, the characteristics are determined by the supplier and the demand through negotiation.
5. The steel strip should be degreased or de-rusted before coating.
6. Core powder of cored wire should keep dry with no other impurities.
7. Alloy cored wire should be firmly coated and seamed precisely with no leak, crack, broken wire, void package, empty package. It should be clear on surface with no greasy dirt.

Ⅴ. Experiment Methods

1. Measure the section size of outer section with vernier calipers. Each plate is measured for not less than 5 times respectively at different parts with not less than 1m of interval.

2. For core powder mass per unit length, balance range that meets the requirement of this criterion is adopted.

Ⅵ. Rules of Inspection

1. Technical supervision department of the producer is responsible for quality inspection of alloy cored wire.
2. The finished product of cored wire is 10 plates or 20t per batch. One plate is picked from each batch and 2m ~ 10m is sampled at any part for inspection on geometric size, core powder mass per unit length and technical requirements.
3. As inspecting, if any inspection item is non-conforming, the inspected plate of alloy cored wire is non-conforming. One sample should be taken from other two plates of the alloy cored wire of the same batch for re-inspection on non-conforming item (in addition to chemical composition of alloy cored wire). If one sample for re-inspection is non-conforming, the batch of alloy cored wire is non-conforming. Plate-by-plate inspection is allowed. The conforming plate is deliverable.

Ⅶ. Package, storage and transportation, mark and quality certificate

1. Package

The outline out of alloy cored wire is wrapped with a piece of plastic cloth tightly. Upon the demander’s approval, no package is permitted.

2. Storage and transportation

Cored wire should be stored in a dry warehouse with no corrosive gas. As freighting, moisture-proof measures should be taken.

3. Mark and quality certificate

A fadeless label shall be affixed to the outer side of each plate of alloy cored wire to indicate name, standard identification, content of main element, size, weight and mass of core powder, production unit, batch number and production date. Quality certificate attached the to the batch is provided.

• [Editor:张德众]