ISO 898 - 1:Testing Schemes from 9.1 to 9.
6 – Ensuring Bolt and Screw
Reliability
In mechanical components, bolts and screws are vital. ISO 898 - 1:2013
offers testing schemes to ensure their performance. Here are the key
testing schemes from sections 9.1 to 9.6:
1. Tensile Testing under Wedge Loading (9.1)
Scope: Finished bolts and screws (excluding studs), diameters 3 mm -
39 mm.
Purpose: Determines tensile strength (Rm) and checks the head -
shank transition.
Importance: Ensures fasteners can bear axial loads without head -
shank junction failure.
2. Tensile Testing for Finished Fasteners (9.2)
Scope: Carbon or alloy steel finished bolts, screws, studs.
Purpose: Measures the ultimate tensile strength (Rm).
Importance: Verifies fasteners can handle max tensile loads as per
performance class.
3. Tensile Testing for Elongation and Stress Determination (9.3)
Scope: Full - size bolts, screws, studs.
Purpose: Determines elongation after fracture (Af) and stress at
0.0048d non - proportional elongation (Rpf).
Importance: Provides insights into ductility and deformation behavior.
4. Tensile Testing for Reduced Loadability Fasteners (9.4)
Scope: Bolts and screws with head designs reducing loadability.
Purpose: Assesses tensile load capacity despite head design
limitations.
Importance: Ensures fasteners with geometric constraints meet
strength requirements.
5. Tensile Testing for Fasteners with Waisted Shank (9.5)
Scope: Fasteners with a waisted shank design.
Purpose: Determines tensile strength (Rm) considering the reduced
cross - sectional area.
Importance: Verifies load - bearing capacity of fasteners with design -
affected load distribution.
6. Proof Load Testing (9.6)
Scope: Finished bolts, screws, studs.
Purpose: Applies a specified tensile proof load and measures
permanent elongation.
Importance: Ensures fasteners can withstand defined loads without
permanent deformation.
These testing schemes collectively ensure bolts and screws perform
reliably under diverse conditions, giving manufacturers and users
confidence in their mechanical performance and helping prevent failures
in critical applications. Adhering to ISO 898 - 1:2013 upholds a global
benchmark for fastener quality and safety.
ISO 898-1: Testing Schemes from 9.1 to 9.6 – Ensuring Bolt and Screw
Reliability
In the world of mechanical components, bolts and screws are unsung
heroes, holding structures together under various stresses. The ISO 898-
1:2013 standard provides a comprehensive set of testing schemes to
ensure these fasteners meet required mechanical and physical
performance levels. Here’s a breakdown of the testing schemes from
sections 9.1 to 9.6 and why they matter:
1. Tensile Testing under Wedge Loading (9.1)
- Scope: For finished bolts and screws (excluding studs) with diameters
between 3 mm and 39 mm.
- Purpose: Determines tensile strength (Rm) and checks the integrity of
the transition between the head and the thread or unthreaded shank.
- Why Important: Ensures the fastener can withstand axial loads without
failing at the head-shank junction, a critical point for structural integrity.
2. Tensile Testing for Finished Fasteners (9.2)
- Scope: Covers finished bolts, screws, and studs made of carbon or alloy
steel.
- Purpose: Measures the ultimate tensile strength (Rm) of the fastener.
- Why Important: Verifies that the fastener can handle maximum tensile
loads as specified by its performance class.
3. Tensile Testing for Elongation and Stress Determination (9.3)
- Scope: Full-size bolts, screws, and studs.
- Purpose: Determines elongation after fracture (Af) and stress at 0.0048d
non-proportional elongation (Rpf).
- Why Important: Provides insights into the ductility and deformation
behavior of the fastener under tensile loads.
4. Tensile Testing for Reduced Loadability Fasteners (9.4)
- Scope: Bolts and screws with head designs that reduce loadability.
- Purpose: Assesses tensile load capacity despite head design limitations.
- Why Important: Ensures even fasteners with geometric constraints meet
strength requirements.
5. Tensile Testing for Fasteners with Waisted Shank (9.5)
- Scope: Fasteners with a waisted shank design.
- Purpose: Determines tensile strength (Rm) considering the reduced
cross-sectional area.
- Why Important: Verifies the load-bearing capacity of fasteners with
intentional design features that affect load distribution.
6. Proof Load Testing (9.6)
- Scope: Finished bolts, screws, and studs.
- Purpose: Applies a specified tensile proof load and measures permanent
elongation.
- Why Important: Ensures the fastener can withstand a defined load
without permanent deformation, crucial for applications requiring precise
dimensional stability.
These testing schemes collectively ensure that bolts and screws perform
reliably under diverse conditions. They provide manufacturers and users
with confidence in the mechanical performance of fasteners, helping to
prevent failures in critical applications. By adhering to ISO 898-1:2013, the
industry upholds a global benchmark for quality and safety in fastener
technology.
ISO 898-1: Testing Schemes from 9.1 to 9.6 – Ensuring Bolt and Screw
Reliability
In the world of mechanical components, bolts and screws are unsung
heroes, holding structures together under various stresses. The ISO 898-
1:2013 standard provides a comprehensive set of testing schemes to
ensure these fasteners meet required mechanical and physical
performance levels. Here’s a breakdown of the testing schemes from
sections 9.1 to 9.6 and why they matter:
1. Tensile Testing under Wedge Loading (9.1)
- Scope: For finished bolts and screws (excluding studs) with diameters
between 3 mm and 39 mm.
- Purpose: Determines tensile strength (Rm) and checks the integrity of
the transition between the head and the thread or unthreaded shank.
- Why Important: Ensures the fastener can withstand axial loads without
failing at the head-shank junction, a critical point for structural integrity.
2. Tensile Testing for Finished Fasteners (9.2)
- Scope: Covers finished bolts, screws, and studs made of carbon or alloy
steel.
- Purpose: Measures the ultimate tensile strength (Rm) of the fastener.
- Why Important: Verifies that the fastener can handle maximum tensile
loads as specified by its performance class.
3. Tensile Testing for Elongation and Stress Determination (9.3)
- Scope: Full-size bolts, screws, and studs.
- Purpose: Determines elongation after fracture (Af) and stress at 0.0048d
non-proportional elongation (Rpf).
- Why Important: Provides insights into the ductility and deformation
behavior of the fastener under tensile loads.
4. Tensile Testing for Reduced Loadability Fasteners (9.4)
- Scope: Bolts and screws with head designs that reduce loadability.
- Purpose: Assesses tensile load capacity despite head design limitations.
- Why Important: Ensures even fasteners with geometric constraints meet
strength requirements.
5. Tensile Testing for Fasteners with Waisted Shank (9.5)
- Scope: Fasteners with a waisted shank design.
- Purpose: Determines tensile strength (Rm) considering the reduced
cross-sectional area.
- Why Important: Verifies the load-bearing capacity of fasteners with
intentional design features that affect load distribution.
6. Proof Load Testing (9.6)
- Scope: Finished bolts, screws, and studs.
- Purpose: Applies a specified tensile proof load and measures permanent
elongation.
- Why Important: Ensures the fastener can withstand a defined load
without permanent deformation, crucial for applications requiring precise
dimensional stability.
These testing schemes collectively ensure that bolts and screws perform
reliably under diverse conditions. They provide manufacturers and users
with confidence in the mechanical performance of fasteners, helping to
prevent failures in critical applications. By adhering to ISO 898-1:2013, the
industry upholds a global benchmark for quality and safety in fastener
technology.
ISO 898-1: 从 9.1 到 9.6 的测试方案 – 确保螺栓和螺钉的可靠性
在机械部件的世界中，螺栓和螺钉是无名英雄，在各种应力下将结构固定在一起。 ISO 898-1:2013 标准提供了一套全面的测试方
案，确保这些紧固件满足所需的机械和物理性能水平。以下是关于 9.1 到 9.6 节测试方案的详细解读：
1. 楔负载下的拉伸试验（9.1）
- 适用范围：适用于直径在 3 毫米到 39 毫米之间的成品螺栓和螺钉（不包括螺柱）。
- 目的：确定抗拉强度（Rm），并检查头部与螺纹或无螺纹杆部之间过渡处的完整性。
- 重要性：确保紧固件能够在不因头部-杆部连接处失效的情况下承受轴向载荷，这对于结构完整性至关重要。
2. 成品紧固件的拉伸试验（9.2）
- 适用范围：覆盖由碳钢或合金钢制成的成品螺栓、螺钉和螺柱。
- 目的：测量紧固件的抗拉强度（Rm）。
- 重要性：验证紧固件是否能够承受其性能等级所规定的最大拉伸载荷。
3. 断裂后伸长率和应力确定的拉伸试验（9.3）
- 适用范围：全尺寸的螺栓、螺钉和螺柱。
- 目的：确定断裂后伸长率（Af）和在 0.0048d 非比例伸长时的应力（Rpf）。
- 重要性：提供紧固件在承受拉伸载荷时的塑性和变形行为的见解。
4. 减载能力紧固件的拉伸试验（9.4）
- 适用范围：头部设计降低载荷能力的螺栓和螺钉。
- 目的：尽管存在头部设计限制，但仍评估拉伸载荷能力。
- 重要性：确保即使具有几何约束的紧固件也能满足强度要求。
5. 带腰杆的紧固件的拉伸试验（9.5）
- 适用范围：带腰杆设计的紧固件。
- 目的：考虑截面积减小的情况下确定抗拉强度（Rm）。
- 重要性：验证具有影响载荷分布的故意设计特征的紧固件的承载能力。
6. 证明载荷试验（9.6）
- 适用范围：成品螺栓、螺钉和螺柱。
- 目的：施加规定的拉伸证明载荷并测量永久伸长。
- 重要性：确保紧固件能够在不发生永久变形的情况下承受规定载荷，这对于需要精确尺寸稳定性的应用至关重要。
这些测试方案共同确保了螺栓和螺钉在各种条件下都能可靠地工作。它们为制造商和用户提供了对紧固件机械性能的信心，有助于防止关键应
用中的故障。通过遵循 ISO 898-1:2013 标准，工业界维持了紧固件技术的全球质量与安全基准。
