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EspañaStainless Steel Sand Casting for Concealed Faucet Rough-In Bodies Has Reached 95%+ Production Yield
不锈钢砂铸预埋体良品率达到95%+：卫浴暗装系统进入新的制造阶段
YUSON’s current production data show that stainless steel sand-cast concealed faucet rough-in bodies have reached 95%+ yield. After casting and machining, the parts undergo comprehensive dimensional verification plus internal and external leakage inspection. In our current comparative validation, dimensional stability and leakage-control performance are outperforming comparable brass rough-in bodies. This article explains why concealed applications are currently the most practical market for stainless steel sand casting and what this means for OEM/ODM sanitaryware development.
YUSON目前生产数据显示，不锈钢砂铸暗装预埋体的良品率已经达到95%以上。铸造与机加工完成后，产品进行全面尺寸验证以及内漏、外漏检测。在当前对比验证中，尺寸稳定性和泄漏控制表现已经超过同类铜预埋体。本文将解释为什么暗装预埋件是现阶段不锈钢砂铸最现实的应用方向，以及这项工艺对OEM/ODM卫浴产品开发意味着什么。
1. What changed in stainless steel faucet sand casting?
1. 不锈钢水龙头砂铸真正发生了什么变化？
For years, the biggest concern around stainless steel faucet casting was not whether stainless steel could be cast, but whether the process could deliver acceptable yield, dimensional stability, pressure reliability and decorative quality at the same time.
过去多年，不锈钢水龙头铸造真正的问题并不是“不锈钢能不能铸”，而是能不能同时做到良率、尺寸稳定、耐压可靠以及高端外观。
For concealed rough-in components, one of those constraints disappears: the raw casting does not need to become a polished visible surface.
对于暗装预埋件来说，其中一个最大的限制条件消失了：铸件外表面根本不需要成为用户可见的镜面外观。
不锈钢砂铸暗装预埋体，完成关键功能接口加工。
2. Current production result: 95%+ yield
2. 当前量产结果：良品率95%+
生产良品率
全面尺寸检验
内漏与外漏检测
According to YUSON’s current production and validation data, stainless steel sand-cast rough-in bodies are achieving over 95% yield. The inspection flow covers critical dimensions, machined interfaces, internal leakage and external leakage.
根据YUSON当前生产和验证数据，不锈钢砂铸预埋体良品率已经超过95%。检验流程覆盖关键尺寸、机加工接口、内漏以及外漏。
暗装应用避开了装饰表面的瓶颈，让工程性能成为第一优先级。
3. Why concealed faucet rough-in bodies are ideal for stainless steel sand casting
3. 为什么暗装预埋体特别适合不锈钢砂铸？
Concealed faucet and shower rough-in bodies require corrosion resistance, mechanical strength, stable waterway geometry, reliable sealing and accurate assembly interfaces. These are exactly the areas where an integrated stainless steel casting combined with precision machining can create value.
暗装龙头和淋浴预埋体真正需要的是耐腐蚀、结构强度、稳定水路、可靠密封和精确装配接口。这些恰恰是不锈钢一体铸造配合精加工能够发挥价值的地方。
适用于暗装卫浴产品的复杂不锈钢砂铸结构。
Compared with decorative faucet bodies, rough-in parts do not require mirror polishing, brushed decorative consistency or direct PVD appearance. That allows the manufacturer to focus resources on casting integrity, machining accuracy and leak-tightness.
与外观龙头本体相比，预埋件不需要镜面抛光、装饰拉丝一致性，也不需要直接承担PVD外观。因此制造过程可以把更多资源集中在铸件完整性、机加工精度和密封可靠性上。
4. Sand casting + CNC machining: how final precision is achieved
4. 砂铸 + CNC：最终精度是怎么实现的？
铸造形成一体化本体，精密机加工形成最终功能接口。
Sand casting should not be judged by raw-surface roughness alone. In a production-grade rough-in body, the casting defines the integrated waterway and structural geometry. CNC machining then controls cartridge seats, threads, sealing surfaces and assembly dimensions.
不能只通过毛坯表面粗糙度来判断砂铸工艺。在量产级预埋体中，砂铸负责一体化水路和结构几何，CNC随后控制阀芯座、螺纹、密封面和装配尺寸。
不锈钢砂铸后完成精密加工的螺纹和接口。
5. What quality controls matter for brand customers?
5. 对品牌客户来说，真正重要的质量控制是什么？
For OEM/ODM and brand-level programs, the supplier evaluation should move beyond “can you cast it?” and focus on whether the production system is repeatable.
对于OEM/ODM和品牌级项目，供应商考察不应该停留在“你能不能铸出来”，而应该看整个生产体系是否具备重复稳定性。
- Raw material chemistry and batch traceability / 原材料化学成分与批次追溯
- Casting process consistency and defect control / 铸造过程一致性与缺陷控制
- Critical wall thickness and dimensional verification / 关键壁厚与尺寸验证
- Machined cartridge seats, threads and sealing surfaces / 阀芯座、螺纹、密封面加工
- Internal leakage and external leakage inspection / 内漏与外漏检测
- Pressure and durability validation according to the final product and target market / 按最终产品及目标市场进行压力与耐久验证
- First-article approval, batch inspection and traceability / 首件确认、批次检验与追溯
功能可靠性和泄漏控制，是暗装不锈钢阀体的关键质量门槛。
6. From single rough-in bodies to integrated concealed waterway systems
6. 从单个预埋体走向集成式暗装水路系统
适用于暗装淋浴和面盆系统的一体化不锈钢水路。
Once the process becomes stable, the commercial opportunity expands quickly. The same casting logic can be applied to concealed basin mixer bodies, concealed shower mixers, thermostatic rough-ins, diverters and more integrated valve modules.
当工艺稳定以后，商业应用范围会快速扩大。同样的砂铸逻辑可以用于暗装面盆龙头、暗装淋浴龙头、恒温预埋体、分水器以及更高集成度的阀体模块。
应用正在从单个部件扩展到更完整的暗装系统。
不锈钢砂铸预埋体进入完整暗装阀体总成。
7. Stainless steel vs brass rough-in bodies: what should buyers compare?
7. 不锈钢与铜预埋体，采购商应该比较什么？
A meaningful comparison should not stop at raw material price per kilogram. Buyers should compare finished-part cost, yield, machining time, leakage rejection rate, corrosion resistance, scrap value, traceability and lifecycle risk.
真正有意义的比较不能只看每公斤原材料价格，而应该看成品综合成本、良率、机加工时间、泄漏不良率、耐腐蚀、废料回收、追溯以及全生命周期风险。
In YUSON’s current validation, stainless steel rough-in bodies are already showing stronger dimensional consistency and leakage-control performance than comparable brass rough-in bodies. However, the exact cost advantage or disadvantage still depends on geometry, alloy grade, casting weight, machining cycle and production volume.
在YUSON当前验证中，不锈钢预埋体已经在尺寸一致性和泄漏控制方面表现出优于同类铜预埋体的结果。但最终成本是否更低，仍取决于结构、材料牌号、铸件重量、加工节拍和订单规模。
8. Final conclusion
8. 最终结论
The near-term breakthrough for stainless steel sand casting in sanitaryware is not the visible faucet body. It is the concealed engineering core.
不锈钢砂铸在卫浴行业近期真正的突破点，不是用户看得见的龙头外壳，而是墙里面的工程核心。
With 95%+ yield, systematic dimensional control and leakage validation, stainless steel sand-cast rough-in bodies have moved from a development topic toward a scalable manufacturing platform.
当良品率达到95%+，并建立系统化尺寸控制和泄漏验证以后，不锈钢砂铸预埋体已经从一个研发话题，开始走向可规模化的制造平台。
The fastest path is to scale stainless steel sand casting first in concealed rough-in systems, accumulate more production data and continuously improve the process. Decorative applications can come later.
最快的路径，是先把不锈钢砂铸大规模应用到暗装预埋系统，在持续量产中积累数据、不断优化工艺，再逐步向外观件扩展。
The 95%+ yield and comparative performance statements in this article are based on YUSON’s current production and validation data. Product certification and regulatory compliance remain project- and market-specific.
本文95%+良品率及性能对比均基于YUSON当前生产与验证数据。产品认证及市场准入仍需结合具体项目与目标市场确认。
FAQ
Can stainless steel sand casting be used for concealed faucet rough-in bodies?
Yes. Based on YUSON’s current production results, stainless steel sand-cast rough-in bodies are already being produced with over 95% yield and full dimensional and leakage inspection.
可以。根据YUSON目前生产结果，不锈钢砂铸预埋体已经实现95%以上良品率，并进行完整尺寸和泄漏检测。
Why use stainless steel sand casting for rough-in parts instead of visible faucet bodies?
Rough-in bodies do not require premium decorative surfaces, so manufacturers can focus on structural integrity, corrosion resistance, machining accuracy and leak-tightness.
因为预埋件不需要高等级装饰外观，因此可以把制造重点集中在结构完整性、耐腐蚀、加工精度和密封可靠性上。
Does 95%+ casting yield mean the final valve automatically meets every market approval?
No. Casting yield is a manufacturing capability indicator. Final market approval depends on the complete product, wetted materials, performance testing and the applicable regulations or certification scheme in the destination market.
不是。95%+良品率代表制造能力，但最终市场准入仍取决于完整产品、过水材料、性能测试以及目标市场适用的法规和认证体系。
Let’s Talk About Stainless Steel Rough-In Systems
一起讨论不锈钢暗装预埋系统
If you are developing concealed basin mixers, concealed shower mixers, thermostatic rough-in systems or stainless steel sanitaryware, we are open to OEM/ODM development, sample validation, material discussions and joint product development.
如果您正在开发暗装面盆龙头、暗装淋浴龙头、恒温预埋系统或不锈钢卫浴产品，欢迎与我们进行 OEM / ODM 开发、样品验证、材料工艺讨论和联合产品开发。
Phone Number: +86-21 61428790, 61428791
Mob (WhatsApp): +86-13818241770
Email: [email protected]
Web: www.yusongroup.com
Location: F1 Floor, Building 9, No. 1568 Changyang Road, 200082, Shanghai, China
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