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Blog2023-03-05T00:18:51+08:00

H13 Tool Steel Promotion (Until Mar-15th only)

H13 Tool Steel Materials for Promotion. Deadline: March-15th ! Take actions before all materials sold out ! All materials are in good quality with EAF/ESR process and vacuum degassing. All materials are in forged, annealed, black condition, and the UT class meet SEP1921-84 E/e class. Click in for details !

March 9th, 2016|Tags: |Comments Off on H13 Tool Steel Promotion (Until Mar-15th only)

ISO 9001 certificate

Otai Special Steel Co is now ISO 9001:2008 certified. We have completed the ISO 9001 auditing and our ISO 9001 certificate is released. Welcome customers all over the world to get in touch with us for your tool steel and engineering steel requests.

February 23rd, 2016|Comments Off on ISO 9001 certificate

A2 vs O1 Steel, Brief Comparison

A2 steel is knows as air harden steel while O1 steel is oil harden steel. Here we briefly compare this two tool steel grades as follows. A2 tool steel belongs to A-Group in ASTM A681, which have high hardenability and may be hardened in air. O1 tool steel belongs to O-Group in A681 standard, which must be hardened by quenching in oil.

December 21st, 2015|Tags: , |Comments Off on A2 vs O1 Steel, Brief Comparison

Round Steel Bar Tolerance: BS 970-3 VS ISO 286-2

As you may know, in steel industry, there must be some dimension and sizes for one product or a project. And for each size of product, there will be some standard and tolerance requirements. In this post, we share the different round steel bar tolerance requirements between BS 970-3 and ISO 286-2 standard, for cold drawn, turned and precision round steel bar.

October 12th, 2015|Comments Off on Round Steel Bar Tolerance: BS 970-3 VS ISO 286-2
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