wqz198 发表于 2009-8-10 17:58:33

what's mean "surface hardening group 5"?

product specfication            PDQB 2102

material                           40Cr         classBB

alternative material       M800L       class   - surface hardening group               5

How to understandsurface hardening group5? It is included a product specification.See above(part)
thanks very much!

wqz198 发表于 2009-8-10 18:08:28

PRODUCTSPECIFICATION               PDQB2102 MATERIAL                                              40Cr               CLASS      BB ALTERNATIVEMATERIAL               M800L             CLASS   - SURFACE   HARDENING   GROUP                           5

hlqhlq 发表于 2009-8-11 08:27:03

I guess there are some surface hardening groups in other specification and you may find group 5.

wty728 发表于 2009-8-11 10:29:33

maybe it means the place 5 need to surface hardening，like partial harden

slfly 发表于 2009-8-11 11:27:45

I think,if you want to know the meaning"surface hardening group 5",you need to read the original text of "PDQB2102".

tom2005 发表于 2009-8-22 09:23:05

I consider it is only state situation of surface hardness, but you can find it from specification.

wangzhaoyan 发表于 2009-9-5 14:13:41

I think 5# is right."sureface harding group 5 "in the specification of PDQB 2102.

fendou 发表于 2009-9-7 09:02:49

we don't have any specification.so we all don'tknow.Please check up your specification.

liangdeyu 发表于 2009-9-7 10:16:43

maybe can find inthe specification
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