RFQ 準備用 PDF ワークシート
見積前の情報整理や、営業から顧客へ転送する用途に使える英語 PDF です。
これらの PDF は RFQ 準備用です。最終的な材料、形状、積層、疲労、取付条件は FeTech の技術レビューが必要です。
Start with the environment, not the catalog name
Many RFQs begin with a familiar alloy name. FeTech starts by asking what the spring will face: temperature, media, required life, maintenance interval and installation geometry. Those inputs narrow the material list much faster than brand names do.
A good disc spring material is the one that keeps the intended load profile through the real operating cycle, not the one with the highest headline strength on a datasheet.
How the main material families are typically used
Standard spring steels are the normal starting point for room-temperature and moderate-temperature industrial assemblies where high force and cost efficiency matter most. Stainless families enter when corrosion resistance becomes a real constraint. Nickel alloys are reserved for heat, severe media or load-retention risk that ordinary steels cannot comfortably cover.
- Spring steel: strong value for general machinery, bolting and controlled industrial duty.
- 17-7PH and other precipitation-hardening stainless options: good balance of corrosion resistance and spring performance.
- 316 and related stainless options: practical where corrosion resistance outweighs maximum force density.
- Inconel 718 and similar nickel alloys: for severe service, high temperature and demanding preload retention.
Common reasons material choices fail
Material mistakes usually come from solving only one problem. A team may specify corrosion resistance but ignore stress relaxation, or choose a high-strength alloy without checking whether media or temperature is actually the main risk.
For B2B spring projects, the alloy should be chosen with the whole joint in view: load, movement, media, temperature, surface condition, maintenance interval and cost of failure.
- Ignoring long-term relaxation at temperature.
- Using standard steel in chloride-rich or sour environments.
- Over-specifying premium alloys where the duty is mild and cost control matters.
- Failing to align surface finish, heat treatment and material choice.
A practical way to screen materials early
If the environment is mild and the load is high, start with spring steel. If corrosion dominates, compare stainless options. If the service combines high heat, corrosion and critical preload retention, move toward nickel alloys and check the stack design in more detail.
This screening logic helps buyers send a clearer first RFQ instead of turning material selection into a trial-and-error quotation cycle.
よくある質問
Is stainless steel always better than spring steel for disc springs?
No. Stainless steel helps in corrosive environments, but standard spring steel often gives better value and higher force capability in controlled service. The right answer depends on the actual operating conditions.
When should I move from stainless to nickel alloy disc springs?
Move up when the application needs better elevated-temperature strength retention, stronger resistance to severe media or longer maintenance intervals than stainless options can comfortably support.
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図面、積層スペース、目標荷重、温度、媒体、数量を送付してください。材料方向、積層ロジック、見積準備度を確認します。
- DIN 2093 置換または特注形状
- バルブ、フランジ、アクチュエータ、過酷用途の積層
- ステンレス、Inconel、Hastelloy、チタン、耐熱鋼の材料確認
最終形状、疲労寿命、K4 根拠、摩擦、支持面条件は技術確認が必要です。