Carbon Steel
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产品描述
符合标准：
JB/T 4747 HD309L AWS A5.9 EQ309L EN 12072 23 12 L ISO 14343 B-BS309L
说明：WD-309L主要成分是低C-22Cr-12Ni，主要使用于带极埋弧堆焊和电渣堆焊中过渡层的焊接；亦可用于热交换器等场合下的单层成型堆焊。堆焊效率高，母材稀释率低；焊道成型美观。搭接熔合平滑，堆焊金属中杂质元素含量低。
用途：广泛应用于石化行业中加氢设备、核容器、尿素设备、海洋平台设备等的堆焊使用。
化学成分：
注意事项：
1、焊前严格对母材打磨，去除铁锈、油污等影响焊接的因素，必须预热。
2、过渡层堆焊时，在保证焊道成型的前提下尽量降低过渡层堆焊厚度(3-3.5 mm)；耐蚀层堆焊时，在保证焊道成型的前提下可以适当增加耐蚀层的厚度(3.5-4 mm)。
3、使用平特性电源效果更好。
4、堆焊位置以水平至2°左右的上坡焊为宜。
推荐焊接参数：
WD-309L Stainless Steel Strip Electrodes for Surfacing
Standards:
AWS A5.9 EQ309L
EN 12072 23 12 L
ISO 14343 B-BS309L
Introduction
The main composition of WD-309L is low C-22Cr-12Ni. This strip is mainly used as transition layer in the welding of submerged arc surfacing with strip electrodes and electroslag surfacing, and also can be used in single-layer forming surfacing of heat exchanger and etc. Due to high surfacing efficiency, low penetration of parent metal, good forming appearance of weld, smooth lapping fusion and low contents of impurity elements in surfacing metal.
Applications
This strip can be extensively used in industry of petrochemical, such as the surfacing service for Hydrogen-added equipment, nuclear vessel, urea equipment, ocean platform equipment and etc.
Typical Chemical Composition of All-Weld Metal
Notice:
1. The parent metal should be strictly ground before welding, and the factors affecting welding such as rust, oil stain and etc should be removed. Preheat must be required.
2. When surfacing on the transition layer, the thickness of transition layer surfacing should be reduced on the premise of ensuring weld forming. (3-3.5 mm); while surfacing on the corrosion resistant layer, the thickness of corrosion resistant layer should be increased properly. (3.5-4 mm)
3. In electroslag surfacing, using flat slope power source will be better.
4. From horizontal to 2° upslope welding is preferred for the surfacing position.
Sizes Available and Recommended Parameters:
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