Technical Specifications of Valve Materials in China Chemical Composition and Hardness of Deposited Metal (Continued 4)

Domestic valve material technical standards   Deposited metal chemical composition and hardness (continued 4)

Serial number Electrode model Deposited metal chemical composition,%

Deposit gold

Is a hardness

HRC

(HB)

C Mn Si Cr Ni Mo W V Nb Co Fe B S P

other

element

Total amount

43 EDD-B2- ×× 0.60 ~ 1.00 0.40 ~ 1.00 1.00 3.00 ~ 5.00 - 7.00 ~ 9.50 0.50 ~ 1.50 0.50 ~ 1.50 - - margin - 0.035 0.035 1.00 -
44 EDD-C- ×× 0.30 ~ 0.50 0.60 0.80 5.00 ~ 9.00 1.00 ~ 2.50 0.80 ~ 1.20 0.03 0.04 55
45 EDD-D- ×× 0.70 ~ 1.00 - - 3.80 ~ 4.50 - 17.00 ~ 19.50 1.00 ~ 1.50 0.035 1.50
46 EDZ-A0- ×× 1.50 ~ 3.00 0.50 ~ 2.00 1.50 4.00 ~ 8.00 1.00 - - 0.035 1.00 -
47 EDZ-A1- ×× 2.50 ~ 4.50 - - 3.00 ~ 5.00 3.00 ~ 5.00 - - - 55
48 EDZ-A2- ×× 3.00 ~ 4.50 1.50 2.50 26.00 ~ 34.00 2.00 ~ 3.00 3.00 60
49 EDZ-A3- ×× 4.80 ~ 6.00 - - 35.00 ~ 40.00 4.20 ~ 5.80 -
50 EDZ-B1- ×× 1.50 ~ 2.20 - - 8.00 ~ 10.00 1.00 50
51 EDZ-B2- ×× 3.00 4.00 ~ 6.00 8.50 ~ 14.00 3.00 60  

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