>> HK-20 jewelry investment powder

HK-20 jewelry investment powder

Name：HK-20 jewelry investment powder NO.：HK-20

Features

1、The casting mold can bear temperature as high as 830℃(1526℉)~850℃(1562℉),
     and has high thermal shock resistance. It can be used in precision casting of noble
     metal with melting temperature under 1300℃.

2、The investment contains oxidation-resisting microcrystals. It prevents casting
     surface from oxidizing during high tempera-ture melting metal pouring in.

3、Applicable in up to 14karat gold added high temperature alloy (such as
     palladium), silver alloy superior line of jewelry casting.

4、Mold cavity duplicates are highly clear and accurate; the cast-ing surface is
     extremely smooth.

5、Automatically collapsed when dip into water, easy to pattern drawing.

Packaging specifications

货号（No.）	规格(Packaging)
2001	45kg(100lb.)/Drum(桶)
2002	45kg(100lb.)/bags(袋)
2003	22.5kg(50lb.)/bags(袋)

Technical Informations：

Model:	HK-20	HK-2000	HK-1000
Water/Powder Ratio:	38-40:100	38-40:100	39-40:100
Working Time:	9-10 min	9-10 min	11-12 min
Initial Set Time:	12-15 min	12-15 min	13-16 min
Thermal Expansion @730℃:	0.72%	0.75%	0.78%
Setting Expansion @2hrs.:	0.50%	0.50%	0.60%
Thermal Compressive strength (730℃×1hrs):	0.71 MPa	0.69 MPa	0.62 MPa
Setting Compressive strength (2hrs.):	1.30 MPa	1.27 MPa	1.19 MPa
Max.Burnout Temp.:	830℃(1,526℉)	750℃(1,382℉)	720℃(1,328℉)