Q/BQB 615-2018 English PDF (QBQB615-2018)

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Q/BQB 615-2018: Carbon steel plates for machine structural
Q/BQB 615-2018
ENTERPRISE STANDARD OF BAOSTEEL CO., LTD.
Replacing BZJ 615-2013
Carbon steel plates for machine structural
ISSUED ON: JANUARY 15, 2018
IMPLEMENTED ON: APRIL 10, 2018
Issued by: Baoshan Iron and Steel Co., Ltd.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 General technical requirements ... 4 
4 Classification and codes ... 5 
5 Dimensions, shapes, weights and tolerances ... 5 
6 Technical requirements ... 5 
7 Inspections and tests ... 6 
8 Annex ... 7 
Annex A (Informative) Comparison table for similar designations in this
Standard and the reference standard ... 8 
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009
“Directives for standardization - Part 1: Structure and drafting of standards”.
This Standard is based on the market demand and the actual situation of
Baoshan Iron and Steel Co., Ltd. (referred to as Baosteel for short).
This Standard replaces BZJ 615-2013 “Carbon thick steel plate for mechanical
structure”. Compared with BZJ 615-2013, the main change in this Standard is
as follows:
- the reference number to the standard was modified to Q/BQB 615.
Annex A of this Standard is informative.
This Standard was proposed by Manufacturing Management Department of
Baoshan Iron and Steel Co., Ltd.
This Standard shall be under the jurisdiction of Manufacturing Management
Department of Baoshan Iron and Steel Co., Ltd.
This Standard was drafted by Manufacturing Management Department of
Baoshan Iron and Steel Co., Ltd.
Drafter of this Standard: Huang Jinhua.
This Standard was issued in January 2018 for the first time.
Carbon steel plates for machine structural
1 Scope
This Standard specifies the dimensions, shapes, technical requirements, tests
and inspections, marks and quality certificates of carbon steel plates for
machine structural use.
This Standard is applicable to the carbon steel plates for machine structural use
that are produced by Baoshan Iron and Steel Co., Ltd.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 223, Methods for chemical analysis of iron, steel and alloy
GB/T 4336, Carbon and low-alloy steel - Determination of multi-element
contents - Spark discharge atomic emission spectrometric method (routine
method)
GB/T 20066, Steel and Iron - Sampling and Preparation of Samples for the
Determination of Chemical Composition
GB/T 20123, Steel and iron - Determination of total carbon and sulfur content
Infrared absorption method after combustion in an induction furnace (routine
method)
GB/T 20125, Low-alloy steel - Determination of multi-element contents -
Inductively coupled plasma atomic emission spectrometric method
Q/BQB 600, Thick steel plate for high strength welded structure
3 General technical requirements
Unless otherwise specified by the standard, the steel plates that are supplied
in accordance with this Standard shall comply with the corresponding
requirements of Q/BQB 600.