GB/T 3098.8-2010 in English

《GB/T 3098.8-2010紧固件机械性能 -200℃～+700℃使用的螺栓连接零件》由TC85（全国紧固件标准化技术委员会）归口，主管部门为中国机械工业联合会。

1 Scope

This part of GB/T 3098 specifies the material designation and mechanical properties of bolt and nut as well as the relevant technical requirements for low temperature toughness at -200℃ and high temperature strength at +700℃.

As an important supplement of GB/T 3098.1, GB/T 3098.2 and GB/T 3098.4, it is applicable to the mechanical properties of fasteners in particular working environment of lower than -50℃ or higher than +150℃.

2 Normative References

The following referenced documents are indispensable for the application of this document. For undated references, only the dated edition applies. For the undated reference, the latest edition (including any amendments) applies.

GB/T 228 Metallic Materials - Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892:1998)
GB/T 3098.1 Mechanical Properties of Fasteners - Bolts, Screws and Studs (GB/T 3098.1-2010, ISO 898-1:2009, MOD)
GB/T 3098.2 Mechanical Properties of Fasteners – Nuts - Coarse Thread (GB/T 3098.2-2000, idt ISO 898-2:1992)
GB/T 3098.4 Mechanical Properties of Fasteners – Nuts - Fine Pitch Thread (GB/T 3098.4-2000, idt ISO 898-6:1994)
GB/T 3098.6 Mechanical Properties of Corrosion-resistant Stainless-steel Fasteners - Part 1: Bolts, Screws and Studs (GB/T 3098.6-2000, idt ISO 3506-1:1997)
GB/T 3098.15 Mechanical Properties of Fasteners - Nuts Made of Stainless-steel (GB/T 3098.15-2000, idt ISO 3506-2:1997)
GB/T 3103.4 Tolerances for Fasteners - Components for Bolted Connections Made mainly from Materials with a High Temperature Strength
GB/T 3104 Fasteners; Widths across Flats of Hexagon Products (GB/T 3104-1982, eqv ISO 272:1982)
GB/T 4340.1 Metallic Materials - Vickers Hardness Test - Part 1: Test Method (GB/T 4340.1-2009, ISO 6507-1:2005, MOD)
GB/T 13807.2 Connections with Waisted Stud - Studs (GB/T 13807.2-2008, DIN 2510-3/4/8:1971, MOD)
GB/T 13807.3 Connections with Waisted Stud - Nuts Extension Sleeves (GB/T 13807.3-2008, DIN 2510-5/6/7:1971, MOD)
DIN EN 10269:2006-07 Steels and Nickel Alloys for Fasteners with Specified Elevated and/or Low Temperature Properties
AD 2000-Instruction W2 ), Austenite and Austenite - Ferritic Steel
AD 2000-Instruction W71), Bolt and Nut Made of Ferritic Steel
AD 2000-Instruction W101), Low Temperature Material - Iron Material
TRD 1061), Steel Bolt and Nut
VdTUV WB 113/2 ), Rolled or Forged and Pressed High-temperature Resistant Austenitic Steel, ×8 CrNiMoBNb16-16+wk - Material Designation Nr1.4986+wk
VdTUV WB 435/32), Rolled or Forged and Pressed Heat-resistant Austenitic Steel, ×5Ni Cr Ti 26 15-16 - Material Designation Nr1.4980
VdTUV WB 4902), Bolt and Nut Made of Heat-resistant Steel 35B2 - Material Designation Nr 1.5511

3 Terms and Definitions

For the purposes of this part, the terms and definitions specified in DIN EN 10269, GB/T 3098.1, GB/T 3098.2, GB/T 3098.4, GB/T 3098.6 and GB/T 3098.15 apply.

Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Material and Mechanical Property Class
5 Inspection
6 Identification Mark
7 Labeling
Annex A (Informative) Steel for High-temperature or/and Low-temperature Fasteners - Comparison of Material Designation between Chinese Standard and DIN EN 10269