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Document GMW GMW3032 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
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GMW GMW3032 Document Information:
Title
High Strength Sheet Steel, 180 MPa through 550 MPa Yield Strengths
GM Worldwide
Publication Date:
Aug 1, 2007
Scope:
This specification covers the requirements for continuous cast
sheet steel with specified minimum yield strengths from 180 MPa
through 700 MPa and is applicable to uncoated and coated, cold or
hot rolled low carbon, solid solution strengthened,
bake-hardenable, interstitial free or high strength low alloy
substrates with good formability. Continuously hot or cold rolled
flat products shall be supplied as coils or sheet. Hot rolled flat
products are usually supplied in thicknesses greater than 1.75 mm.
These flat products are used for cold forming and for manufacturing
of welded tubes. Cold rolled flat products with the appropriate
surface type and surface finish are suitable for the application of
surface coatings (metallic hot dipping, electrolytic plating, hot
spray painting, organic coatings and/or other coatings). This
specification does not apply to steel for case hardening and cold
reduced, work hardened strips. Additional requirements or
agreements shall be specified by regional GM Automotive Operations
(GM) business units [e.g., North America (GMNA), Europe (GME),
Latin America (GMLAAM), and Asia Pacific (GMAP)].
Material Description.
The material designation is defined by the GMW base metal
specification number, steel product type, minimum yield strength,
and finish type. The steel product type is designated by CR for
cold rolled products, or HR for hot rolled products. A numeral
(180, 210, 240, etc.) will designate the minimum yield strength
level in megapascals (MPa). A designation of steel type shall be
added to bake hardenable (B0 and B2), solid solution strengthened
grades (P and IF), and high strength low alloy (LA) steels as shown
in section 8. The dual phase (DP) grades have been removed from
this specification and are now covered by equivalent grades in
GMW3399. GMW3032M-ST-S CR550 has been deleted from this
specification and has been replaced by GMW3399M-ST-S CR690T/550Y
DP. An "F" designation may be added on engineering and/or
manufacturing documents following an LA steel type to specify the
steel as inclusion-controlled. The steel grades will correspond to
the chemical and mechanical requirements as shown in Tables 1, 2,
3, 4 and 5. The finish type, an alpha character, will designate the
finish as E (exposed) or U (unexposed). In addition, products which
are not coated shall have the word "UNCOATED" added to the call-out
after the steel type, but before the finish designation. The above
descriptive items are used together to form the coding system.
Examples of the coding system for engineering part drawings and
manufacturing engineering documents are shown in section 8.
Material Identification.
(See Appendix A).
Typical Applications.
Typical applications are coated or uncoated sheet metal parts
consisting of high strength sheet steel with specified minimum
yield strengths from 180 MPa through 700 MPa.
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