Standard No.:	GB/T 531.2-2009
English Name:	Rubber vulcanized or thermoplastic - Determination of indentation hardness - Part 2: IRHD pocket meter method
Chinese Name:	硫化橡胶或热塑性橡胶 压入硬度试验方法 第2部分：便携式橡胶国际硬度计法
Chinese Classification:	G40    Rubber products in general
Professional Classification:	GB    National Standard
Source Content Issued by:	AQSIQ; SAC
Issued on:	2009-4-24
Implemented on:	2009-12-1
Status:	superseded
Superseded by:	GB/T 531-1999 Rubber-Determination of indentation hardness by means of pocket hardness meters GB/T 39693.5-2025 Rubber, vulcanized or thermoplastic—Determination of hardness—Part 5: Indentation hardness by IRHD pocket meter method
Superseded on:	2026-3-1
Abolished on:	2026-03-01
Superseding:	GB/T 531-1999 Rubber-Determination of indentation hardness by means of pocket hardness meters
Target Language:	English
File Format:	PDF
Word Count:	2000 words
Translation Price(USD):	40.0
Delivery:	via email in 1 business day

1. Scope This part of GB/T 531 specifies a method for determining the indentation hardness of vulcanized or thermoplastic rubber by means of a pocket hardness meter calibrated in IRHD. The use of such meters is primarily intended for control, not specification, purposes . It is possible to increase precision by fixing the pocket hardness meter on a support.. 2. Normative references The following normative documents contain provision which, through reference in this text, constitute provisions of this national standard. For dated reference, subsequent amendments to, or revisions of, any of these publications do not apply. But the parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the standards indicated below. For undated references, the latest edition of the normative document referred to applies.