SINORAY Spring Steel Wire is supplied on Coils, Spools, also other forms, properly packed, and delivered with documents.
Form of delivery
Spring steel wire is delivered in unit packages of a coil, individualized or on carriers, or a spool or spoolless core or as straight lengths.
Unless otherwise agreed at the time of ordering, the form of delivery will be coils; straight lengths shall be supplied in bundles.
Supply conditions of wire on coils/reels and spools
The wire of a unit package shall consist of one single length of wire originating from only one heat. For grades medium tensile wire and high tensile wire, only the welds prior to the last patenting operation are allowed; all other welds shall be removed, or - if so agreed upon - properly marked.
For the wire grades for still stress, welds are allowed at the size of the last patenting treatment. For other welds, the treatment of the welds shall be subject to an arrangement between the parties involved, depending on wire diameter and application.
Coil size
The coil internal diameter of coils is per below size:
Wire diameter and associated minimum coil internal diameter
| Wire Diametera(mm) | Minimum internal diameter (mm) |
| 0.25 <= d < 0.28 | 100 |
| 0.28 <= d < 0.50 | 150 |
| 0.50 <= d < 0.70 | 180 |
| 0.70 <= d < 1.60 | 250 |
| 1.60 <= d <4.50 | 400 |
| 4.50 <= d | 500 |
| For wire diameter below 0.25 mm specific agreements shall be made betwwen the parties. | |
Cast of wire
The wire is uniformly cast. Unless otherwise specified the wap diameter of wire supplied in coils/reels may expand when the binding wires are removed, but should usually not retract to an internal diameter smaller than the original cast diameter. The expansion shall be approximately even within a single package and within all the units in a production batch.
Helix cast of wire
The wire shall be dead cast. The requirement shall be considered fulfilled in the case of wire finer than 5,00 mm in diameter if the following condition is satisfied.
An individual wap taken from a coil/reel or bobbin and freely hung on hook may show an axial displacement “f” at the ends of the wap.
Spring wire products are delivered with specific testing and the relevant inspection document ( EN 10204) agreed at the time of enquiry and order.
The inspection document includes the following information :
Each unit shall be properly marked and identified so as to permit traceability and reference to the inspection documents.
The labels can withstand normal handling and contact with oil.
The labels normally show the information below. Other information shall be the subject of an arrangement between the parties.
Wire shipments shall be suitably protected against mechanical damage and/or contamination during transport.
Common Information on the labels / shipping marks include:
Designation;
Manufacturer;
Nominal diameter;
Spring wire grade;
Surface finish;
Cast number;
Coating;
Package number;
Origin of Country.