ISO 20740:2019 pdf download – Martial arts – Wushu Taiji sword – Requirements and test method
1 Scope
This document specifies terms and definitions, product structure, requirements, test method and marking of Wushu Taiji (Tai Chi) sword.
This document is applicable to the sword used for the Wushu (Chinese martial arts also known as Kung Fu) Taiji (Tai Chi) sport.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters
ISO 8124-3, Safety of toys — Part 3: Migration of certain elements
ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 10289, Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates — Rating of test specimens and manufactured articles subjected to corrosion tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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3.1 Wushu Taiji sword
apparatus used for practice and demonstration of Wushu Taiji sport
Note 1 to entry: See Figure 1.
3.2 blade
part from tip to guard (3.3), including the edge, central ridge and tip
Note 1 to entry: See Figure 2.
5.2.2 The pommel shall be 45 mm to 50 mm long and 38 mm to 43 mm wide and 13 mm to 18 mm thick. The shape of the pommel shall be designed as shown in Figure 5.
5.2.3 The guard shall be 80 mm to 120 mm wide and 13 mm to 18 mm thick. The shape of the guard shall be designed as shown in Figure 3.
5.2.4 The blade shall be trapezoid and become narrower gradually from the end of the blade towards the tip, with the width of the blade end of 33 mm to 35 mm and that of the tip 22 mm to 24 mm.
5.2.5 The distance from the point of balance (POB) to the guard shall be 30 mm to 40 mm.
5.2.6 Deviations of the length of the blade and hilt shall be according to Table 1.
5.4 Elasticity
After the test according to 7.3, the straightness of the blade shall be less than 2 mm.
5.5 Coating adhesion
After the test on the surface-treated sword according to 7.4, the blade and metallic decorative pieces shall be without flacking or cracking.
5.6 Safety
5.6.1 The blade shall be well rounded at tip, with the radius greater than or equal to 3 mm (R ≥ 3 mm).
5.6.2 The blade edge, pommel, hilt, guard and metallic decorative pieces shall have a smooth surface without thorns or burrs.
5.6.3 Hazardous substances in the coatings on the scabbard and hilt shall be within the limits specified in Table 3