Valid

GB/T 3098.8-2010Mechanical properties of fasteners -- Parts for bolted connections for use at temperatures from -200 Celsius~+700 Celsius (English PDF)

紧固件机械性能 -200℃～+700℃使用的螺栓连接零件

Preview PDF

This is a limited preview

Buy now to download the full PDF (17 pages)

Need quotation for your management?

Get a formal quotation for GB/T 3098.8-2010 in 30 minutes.

Issued by

General Administration of Quality Supervision, Inspection and Quarantine of PRC

Level / Type

National · Recommended

Issue date

January 10, 2011

Implementation date

October 1, 2011

Scope

GB/T 3098.8-2010 is the English-translated version of 紧固件机械性能 -200℃～+700℃使用的螺栓连接零件.

GB/T 3098.8-2010 — This part of GB/T 3098 specifies the material designations and mechanical properties of bolts and nuts, as well as the relevant technical requirements for low temperature toughness at -200 °C and high temperature strength at +700 °C. As an important supplement to GB/T 3098.1, GB/T 3098.2, GB/T 3098.4, it is applicable to the mechanical properties of fasteners in special working environments with working temperatures below -50 °C or above +150 °C.

Found what you need?

Document preview — GB/T 3098.8-2010

National Standard of the People's Republic of China

ICS: 21.060.10
Classification: J 13

Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC

Foreword...3
1 Scope...6
2 Normative references...6
3 Terms and definitions...7
4 Material and mechanical property grade...7
5 Inspection...15
6 Identification marks...17
7 Marking...17

Foreword

This Part of GB/T 3098 (hereinafter referred to as this Part) is one of the national

standards "Mechanical properties of fasteners" series. The series includes:

a) GB/T 3098.1-2010 Mechanical properties of fasteners - Bolts, screws and studs;

b) GB/T 3098.2-2000 Mechanical properties of fasteners - Nuts - Coarse thread;

c) GB/T 3098.3-2000 Mechanical properties of fasteners - Set screws;

d) GB/T 3098.4-2000 Mechanical properties of fasteners - Nuts - Fine pitch thread;

e) GB/T 3098.5-2000 Mechanical properties of fasteners - Tapping screws;

f) GB/T 3098.6-2000 Mechanical properties of corrosion-resistant stainless-steel

fasteners - Part 1: Bolts, screws and studs;

g) GB/T 3098.7-2000 Mechanical properties of fasteners - Thread rolling screws;

h) GB/T 3098.8-2010 Mechanical properties of fasteners - Parts for bolted

connections for use at temperatures from -200 °C ~ +700 °C;

i) GB/T 3098.9-2010 Mechanical properties of fasteners - Prevailing torque type

steel nuts;

j) GB/T 3098.10-1993 Mechanical properties of fasteners - Bolts, screws, studs and

nuts made of non-ferrous metals;

k) GB/T 3098.11-2002 Mechanical properties of fasteners - Drilling screws with

taping screw thread;

l) GB/T 3098.12-1996 Mechanical properties of fasteners - Cone proof load test on

nuts;

m) GB/T 3098.13-1996 Mechanical properties of fasteners - Torsional test and

minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm;

n) GB/T 3098.14-2000 Mechanical properties of fasteners - Widening test on nuts;

o) GB/T 3098.15-2000 Mechanical properties of fasteners - Nuts made of stainless-

steel;

p) GB/T 3098.16-2000 Mechanical properties of fasteners - Set screws made of

stainless-steel;

q) GB/T 3098.17-1996 Mechanical properties of fasteners - Preloading test for the

Mechanical properties of fasteners - Parts for bolted

connections for use at temperatures from -200 °C ~ +700 °C

1 Scope

This part of GB/T 3098 specifies the material designations and mechanical properties

of bolts and nuts, as well as the relevant technical requirements for low temperature

toughness at -200 °C and high temperature strength at +700 °C.

As an important supplement to GB/T 3098.1, GB/T 3098.2, GB/T 3098.4, it is

applicable to the mechanical properties of fasteners in special working environments

with working temperatures below -50 °C or above +150 °C.

2 Normative references

The following documents are essential to the application of this document. For the dated

documents, only the versions with the dates indicated are applicable to this document;

for the undated documents, only the latest version (including all the amendments) is

applicable to this standard.

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 fasteners stainless steel bolts, screws and

studs (GB/T 3098.6-2000, idt ISO3506-1:1997)

GB/T 3098.15 Mechanical properties of fasteners stainless nut (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/T13807.2 Connections with waisted stud - Studs (GB/T 13807.2-2008, DIN

2510-3/4/8:1971, MOD)

GB/T13807.3 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 - Instructions W2 1), austenitic and austenitic - Ferritic steels

AD 2000 - Instructions W7 1), bolts and nuts made of ferritic steel

AD 2000 - Instructions W10 1), low temperature materials - Iron materials

TRD 106 1) Steel bolts and nuts

VdTUV WB 113/2 2) Rolled or forged high temperature resistant austenitic steel,

×8 CrNiMoBNb16-16+wk - Material number Nr1.4986+wk

VdTUV WB 435/3 2) Rolled or forged heat-resistant austenitic steel, ×5Ni Cr Ti 26

15-16 - Material number Nr1.4980

VdTUV WB 490 2) Bolts and nuts made of heat-resistant steel 35B2 - Material

number Nr1.5511

3 Terms and definitions

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, GB/T 3098.15 apply to this Part.

4 Material and mechanical property grade

4.1 Mechanical properties

Table 1 gives austenitic steel fasteners with a minimum operating temperature of -

200 °C. The properties of the material shall comply with the provisions of GB/T 3098.6

and GB/T 3098.15.

1 Source: Beuth Publishing Co., Ltd., Berlin 10772.

2 Source: TÜV Publishing Co., Ltd. Rheinland, Postal Code 101750, 50672 Cologne.

- The tensile strength of the nut material shall be higher than 70% of the tensile

strength of the bolt material;

- The reasonable matching of bolt and nut materials is shown in Table 3.

Note: If the bolt material is selected according to Table 3 and a load-bearing sleeve is used, the

load-bearing sleeve shall preferably be made of the same material as the bolt.

4.2.2 Bolts with full load capacity

Bolts that meet the following requirements at the time of fracture can be considered to

have full load capacity:

- When the bolts are subjected to a tensile test, the minimum tensile load (Rm,min ×

As, nominal) in Table 4a or Table 5a can be reached;

- When the bolts made of steel and nickel-chromium steel in Table 2 are tested

according to GB/T 3098.1, the fracture shall occur within the length of the

unthreaded thread;

- When the bolts made of austenitic steel in Table 1 are tested according to GB/T

3098.6, the fracture shall occur within the length of the unthreaded thread or the

unthreaded shank.

4.2.3 Nuts with full load capacity

When broken, nuts that meet the following requirements can be considered to have full

load capacity:

- The nut can withstand the minimum tensile load of the bolt given in Table 4a or

Table 5a (Rm,min × As, nominal);

- The outer diameter of the round nut or the minimum width across flats of the

hexagonal nut meets the requirements of GB/T 3104;

- The minimum height of the coarse-pitch nut meets the requirements of Type 1; the

minimum height of the fine-pitch nut meets the requirements of Type 2.

performed on the actual bolts in accordance with GB/T 3098.6 to determine RP0.2, Rm,

For bolts with full load-bearing capacity and materials in accordance with Table 2, a

tensile test is performed on the actual bolts in accordance with GB/T 3098.1 to

determine Rm (Table 3).

5.3 Nuts with full load-bearing capacity

Arbitration test:

For nuts with full load-bearing capacity and materials in accordance with Table 1 or

Table 2, the proof load is determined in accordance with GB/T 3098.2 or GB/T 3098.4

(Table 4b or Table 5b).

5.4 Bolts with reduced load-bearing capacity

Arbitration test:

For waisted shank bolts with reduced load-bearing capacity and materials in accordance

with Table 1, a tensile test is performed on the actual bolts in accordance with GB/T

228 to determine: RP0.2, Rm, A, Z (according to DIN EN 10269).

For bolts with reduced bearing capacity and materials in accordance with Table 1, low

head bearing capacity, and uniform performance (such as grade 50, state as +AT

according to DIN EN 10269), tensile tests are carried out on machined samples

according to GB/T 228 to determine: RP0.2, Rm, A, Z (according to DIN EN 10269).

For bolts with reduced bearing capacity and materials in accordance with Table 1, low

head bearing capacity, grade 70 (state as +C700 according to DIN EN 10269), and cold

work hardened, tensile tests are carried out on the actual bolts according to GB/T 3098.6

to determine the minimum tensile load.

For bolts with reduced bearing capacity and materials in accordance with Table 2,

tensile tests are carried out on machined samples according to GB/T228 to determine:

RP0.2, Rm, A, Z (according to DIN EN 10269). Only when the bolt length cannot be

subjected to tensile testing, its Vickers hardness value is tested according to GB/T

4340.1 (according to GB/T 3098.1).

5.5 Nuts with reduced load capacity

For nuts with reduced load capacity and materials in accordance with Table 1, the proof

load shall be determined according to GB/T 3098.2 or GB/T 3098.4.

For nuts with reduced load capacity and materials in accordance with Table 2, the

Vickers hardness shall be determined according to Table 2 and GB/T 4340.1.

6 Identification marks

Connector products that meet the requirements of this Part must have the manufacturer's

identification mark; the steel group and performance grade shall be made according to

Table 1, or the manufacturer's identification mark and material abbreviation shall be

made according to Table 2. If there is no other agreement, the marking requirements

shall be selected from GB/T 3098.6, GB/T 3098.15 or GB/T 3098.4, or GB/T13807.2

and GB/T 13807.3.

When the design of austenitic bolts or nuts requires a certain material, the material

number shall be used instead of the steel group selected according to GB/T 3098.6 or

GB/T 3098.15.

7 Marking

Fasteners made of cold-toughness or high-temperature strength materials shall be

marked with the steel group and performance grade according to Table 1, or the

abbreviation of the material shall be marked according to Table 2, for example:

Marking of equal-length double-headed studs with thread specification d = M30,

nominal length l = 200 mm, L-type, material A4-70, product grade TB, surface with

oxidation treatment:

Stud GB/T 13807.2 LM30×200-TB-A4-70-Oxidation

Marking of equal-length double-headed studs with thread specification d = M30,

nominal length l = 200 mm, L-type, material GA, product grade TB, surface with

oxidation treatment:

Stud GB/T 13807.2 LM30×200-TB-GA-oxidation

When austenitic bolts or nuts are designed with certain materials, the material number

shall be used instead of the marking of the steel group selected according to GB/T

3098.6 or GB/T 3098.15:

Stud GB/T 13807.2 LM30×200-TB-1.4541-70-oxidation

......

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 228 · ISO 6892 · ISO 898 · GB/T 3098.4 · ISO3506 · ISO 3506 · ISO 272 · ISO 6507 · GB/T13807.2 · GB/T 13807.2-2008 · GB/T13807.3

Cited by

How to Download GB/T 3098.8-2010

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.