1、 Comparison of Material Characteristics （1） Metal coffin Metal coffins are usually made of metal materials such as copper, iron, zinc, etc. Taking the 20 # steel metal coffin sold by Hebei Xubing International Trade Co., Ltd. as an example, 20 # steel is a high-quality carbon structural steel with good mechanical and processing properties. Its moderate carbon content not only ensures the strength and hardness of the steel, but also gives it good toughness and weldability. The specially treated No. 20 steel has been added with trace amounts of rare metal elements, further improving its hardenability, high-temperature strength, strength and toughness, as well as fatigue resistance. This makes metal coffins sturdy, durable, and highly corrosion-resistant, which can maintain structural stability for a long time and prevent deformation or cracking. （2） Wooden coffin Wooden coffins are often made of high-quality wood. These woods have natural textures and colors, giving people a natural and warm feeling. The wooden floor is warm and soft, with delicate and smooth textures. The newly cut wood surface is yellow with a hint of green, and emits a faint fragrance when it rains. It not only has a unique aroma and can prevent decay, but also has fine and beautiful patterns. The old material is asexual and not easily deformed. It is not cool to touch in winter and not hot in summer, and does not harm the body. It also has characteristics such as insect resistance and corrosion resistance. 2、 Comparison of production processes （1） Metal coffin The production process of metal coffins is relatively complex, requiring multiple steps such as cutting, welding, polishing, and surface treatment. Hebei Xubing International Trade Co., Ltd. adopts internationally leading German imported CNC laser cutting equipment to accurately cut the No. 20 steel plate, with an error controlled within ± 0.05mm. During the welding process, welding parameters are strictly controlled and various advanced welding techniques are used, such as robot automatic gas shielded welding and manual argon arc welding, to ensure that the weld seam is uniform and firm. After welding is completed, ultrasonic testing and X-ray testing will be conducted on the weld seam to ensure that the quality of the weld meets international standards. In terms of surface treatment, advanced acid pickling and phosphating treatment, as well as multi-layer spray painting or plastic spraying processes, are adopted to make the appearance of the coffin smooth and bright, which can effectively resist the erosion of the external environment. （2） Wooden coffin The production process of wooden coffins is relatively traditional, mainly including material selection, cutting, splicing, polishing, painting and other steps. When selecting materials, it is necessary to choose wood with excellent texture and beautiful grain. During the cutting and splicing process, attention should be paid to the splicing method and structural stability of the wood. Polishing and painting are to make the surface of the coffin smooth, increase aesthetics and durability. Some customized wooden coffins also use carving, inlay and other techniques to increase their artistic value.