説明
Five-percent-chromium high-temperature bolting
ASTM A193 B5 High Temperature Stud Bolts
ASTM A193 Grade B5 fully threaded alloy-steel stud bolts supplied to the required dimensions, threads and finish, with compatible heavy hex nuts and traceable documentation.
簡単な回答
ASTM A193 Grade B5 is a heat-treated chromium-molybdenum alloy-steel bolting grade containing substantially more chromium than B7. It is used when a piping or equipment specification requires B5 for high-temperature or special-purpose flange bolting.
製品の概要
とは何ですか ASTM A193 B5スタッドボルト?
ASTM A193 B5 stud bolts are high-temperature alloy-steel fasteners made to a chromium-molybdenum grade commonly described as five-percent-chromium bolting. The increased chromium content differentiates B5 from the more common B7 grade and aligns it with specific high-temperature piping and equipment material systems.
B5 identifies the bolting material and heat-treatment requirements; it does not define the flange, torque, overall stud length or service limit. A complete order states the ASTM edition, diameter, スレッドシリーズ, 長さ, compatible nut grade, 表面状態, testing and project inspection requirements.
ASTM A193 B5 stud bolt specifications
| 材料 | Chromium-molybdenum alloy steel, commonly described as 5% Cr |
|---|---|
| 熱処理 | Heat treated to ASTM A193/A193M Grade B5 |
| 構成 | Fully threaded flange stud; double-end configuration by drawing |
| スレッド | UNC, 8国連またはプロジェクト指定のシリーズおよびクラス ASME B1.1 |
| 寸法 | ASME B18.31.2, フランジのボルト締めスケジュールまたは承認された図面 |
| マッチするナット | ASTM A194/A194M 学年 3 when specified and compatible |
| 仕上げオプション | 無地, black or project-approved high-temperature coating |
| ドキュメント | MTC, 熱処理, 機械的試験, 硬度, PMI and dimensions as ordered |
最終寸法, 熱処理, class or grade properties, コーティング, testing and acceptance criteria follow the purchase order and contractually required standard edition.
このグレードを指定する理由?
Specify B5 when the approved piping material class or equipment datasheet explicitly calls for this chromium-molybdenum bolting grade. It is especially relevant when the adjoining pressure components use compatible chromium-alloy material systems and high-temperature performance is required.
エンジニアリングに関する重要なメモ
Do not substitute B7, B6 or B16 for B5 based on strength alone. 化学, 許容応力, oxidation behaviour, nut compatibility, coating temperature and the governing code must be reviewed for the actual joint.
スタッド, ナットと仕上げのオプション
代表的な用途
品質, 検査と文書化
B5 orders can be controlled with PMI and heat-number traceability so the chromium-alloy grade remains identifiable through cutting, threading, heat treatment and final inspection.
- EN 10204 3.1 注文時の材料試験証明書
- Heat-number and batch traceability from raw material to finished stud
- Chemical composition and mechanical-property records
- Heat-treatment record and hardness test results
- 寸法検査と校正済みねじゲージ
- PMI when specified for chromium or A-286 alloy identification
- 表面, coating or passivation inspection as applicable
- 第三者による検査, 契約に基づくマーキングと輸出梱包
お見積りに必要な情報
- ASTM規格, exact grade or class and required edition
- スタッド径, 全長, スレッドシリーズとスレッドクラス
- 適合ナット仕様, grade or class, style and quantity
- Design and operating temperatures plus any cyclic or upset conditions
- 無地, passivated, coated or plated finish and approved process
- MTC, PMI, 硬度, 引張, コーティングおよび第三者検査の要件
- Applicable piping code, equipment specification and owner supplements
- 量, delivery destination, 梱包方法と必要なスケジュール
よくある質問
What material is ASTM A193 B5?
B5 is a heat-treated chromium-molybdenum alloy-steel bolting grade commonly described as containing approximately five percent chromium.
Which nuts are commonly used with B5 stud bolts?
ASTM A194 学年 3 heavy hex nuts are commonly specified. The project must confirm nut grade, 寸法, finish and temperature compatibility.
Is B5 interchangeable with B7 or B16?
No automatic interchangeability should be assumed. The grades differ in chemistry and high-temperature characteristics, and substitution requires engineering and purchaser approval.
Can B5 stud bolts be PMI tested?
はい. PMI can be specified to verify alloy identity, with the method, sampling frequency, acceptance criteria and reporting stated in the inspection plan.
スタッドボルト関連商品
Reference standard
Material and class requirements are controlled by ASTM A193/A193M. ねじの形状とスタッドの寸法を参照してください。 ASME B1.1 そして ASME B18.31.2. State the contractually required edition in the purchase order and review all supplementary project requirements.
技術的な見積もりをリクエストする
Send the grade or class, bolting schedule, nut requirement, サービス条件, inspection plan and delivery destination for technical review.
