ISO 20740:2019 pdf free.Martial arts – Wushu Taiji sword – Requirements and test method.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
-ISO Online browsing platform: available at https://www.so.org/obp
– IEC Electropedia: available at http://www.electropedia.org/
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 2.3.3 guard device assembled on the hilt (3.4) to protect hands
Note 1 to entry: See Figure 3. 3.4 hilt part next to the guard (3.3) for the hand to hold the sword
Note 1 to entry: See Figure 4.5.2.2 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 (P0 B) 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 3.5.6.4 The blade shall not be sharp, with the thickness of its end no less than 1,2 mm, that of its middle part no less than 0,7 mm and the tip no less than 0,2 mm. 5.7 Aspect 5.7.1 The surface roughness of blades shall be more than Ra 0,40 (according to ISO 4287). 5.7.2 The pommel, hilt, guard, blade and metallic decorative pieces shall have a smooth and delicate surface with no flaking, cracking or peeling.5.7.3 The blade shall not be turned and the surface shall be free of chips, cracks, apparent scratches or spots. 5.7.4 The surface of the scabbard shall be with uniform and smooth coating and no apparent scratches. 5.7.5 The left-right deviation of the central ridge shall be less than 2 mm. 5.8 Assembling 5.8.1 The pommel, hilt, guard and blade shall be connected firmly with each other and not easily loose. 5.8.2 The connection between the end of the blade and the bolt shall be able to sustain a tension of 500 N without deformation or flaking.
5.8.3 The pommel, hilt and blade shall be on the same line, with a deviation less than 3 mm.
5.8.4 The bolt shall not be higher than the screw-nut after being assembled. 5.9 Corrosion resistance
Surface-treated blade and metal parts shall be maintained above grade 6 (according to ISO 9227) after the neutral salt spray test (according to ISO 9227).ISO 20740 pdf download.