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MIM Materials

Applicable materials for Metal injection molding

MIM process is applicable to a wide range of materials, including low alloy steel, stainless steel, tool steel, nickel base alloy, tungsten alloy, hard alloy, titanium alloy, magnetic materials, Kovar alloy, fine ceramics, etc

What kind of metal products are suitable for the MIM process:
1. MIM components weight usually is 0.2g – 200g.
2. The projected area is 100 square centimeters.
3. The MIM parts size accuracy above 10MM is ±0.5%.
4. The MIM parts maximum wall thickness is 10MM.
5. Minimum size 0.2MM.

Table 1 Commonly used MIM materials and their application fields

Material system
Alloy brand, composition
Application field
Low alloy steel
Fe-2Ni、 Fe-8Ni
Various structural parts of automobile, machinery and other industries
Stainless steel
316L 、17-4PH、 420、 440C
Medical instruments, watch parts
Hard alloy
WC-Co
All kinds of knives, clocks, watches
ceramic
Al 2O3 、 ZrO2 、 SiO2
IT electronics, daily necessities, clocks and watches
Heavy alloy
W-Ni-Fe、 W-Ni-Cu、 W-Cu
Military industry, communications, daily necessities
Titanium alloy
Ti、Ti-6Al-4V
Medical and military structural parts
Magnetic material
Fe、 NdFeB、 SmCo5、Fe-Si
Various magnetic components
Tool steel
CrMo4、M2
Various tools

Table 2 Properties of commonly used MIM materials:

Material Designation
Alloy Composition (wt%)
Condition
Density ρ (g/cm³)
UTS σ b(Mpa)
YS σ 0.2(Mpa)
Elongation σ (%)
Hardness
Low Alloy Steel
MIM4600 (MIM2200)
Ni 1.5~2.5% Mo 0.5% max Fe balance
Sinterd
7.50
290
125
40
45~65HRB
MIM4600 (modeifed) (MIM2700)
Ni 6.5~8.5% Mo 0.5%max Fe balance
Sinterd
7.60
410
210
26
70~90HRB
MIM4605
Ni 1.5~2.5% Mo 0.2~0.5% C 0.4~0.6% Fe balance
Sinterd
Heat Treated
7.50
7.50
415
1655
255
1480
15
2
65-85HRB
45~50HRC
MIM4140
Ni 0.75~1.25% Cr 0.75~1.25% Mo 0.75%max C 0.3~0.5% Fe balance
Sinterd
Heat Treated
7.50
7.50
820
1400
620
820
10
5
70~100HRB
45~45HRC
Stainless Steel
MIM SS316L
C 0.03%max Ni 10~14% Mo 2~3% Cr 18~20% Fe balance
Sinterd
7.75
500
250
4
65~85HRB
MIM SS304
C 0.08% max Ni 8~10% Cr 18~20% Fe balance
Sinterd
7.65
480
270
35
65~85HRB
MIM SS420
C 0.2~0.4% Cr 12~14% Fe balance
Heat Treated
7.40
1310
11500
6
40~45HRC
MIM 17-4PH
C 0.07%max Cr 15.5~17.5% Cu 3~5% Ni 3~5% Nb 0.15~0.45% Fe balance
Sinterd
Heat Treated
7.50
7.50
900
1185
730
1090
6
5
20~28HRC
32~42HRC
MIM SS310S
Sinterd
7.70
520
205
40
80~100HRB
Magnetic Materials
MIM Fe3Si
C0.05% Si 2.5~3.5% Fe balance
Sinterd
7.60
530
390
24
75~85HRB
MIM Fe50Ni
C 0.05%max Ni 49~51% Fe balance
Sinterd
7.70
455
160
30
50~65HRB
MIM Fe50Co
C 0.05%max Co 48~50% Fe balance
Sinterd
7.70
205
140
~1.0
65~85HRB
MIM SS430
C 0.05max Cr 16~18% Fe balance
Sinterd
7.50
400
240
25
65~HRB

Table 3 Comparison between MIM and other processes:

Comparison project
MIM
P/M
Die Casting
Investment Casting
Machining
Part density
High
Low
High
Fair
High
Part tensile strength
0.5mm
1mm
0.8mm
2mm
0.5mm
Part surface finish
Fine1 μ m Ra
Coares
Medium
Medium 5 μ m Ra
Fine
Parts miniaturization capability
Good
Fair
Poor
Fair
Good
Parts thin-walled capacity
Many
Average
Few
Average
Many
Parts complexity
95~100%
<95%
99~100%
99~100%
99~100%
Tolerance of part design
Average
High
Average
Average
High
Mass production capacity
Good
Poor
Fair
Good
Good
Adaptive material range
High
High
High
Fair
Low
Supply capacity
Average
Low
Low
Average
High

Metal injection molding is a new powder metallurgy process, it can produce high density and complex shape sintered parts without machining. With the unique characteristics of MIM materials, MIM is able to produce precision metal parts for a variety of products, including automobiles, mobile phones, hand tools, dental instruments, pneumatic tools, power hand tools, surgical instruments, sporting goods and laptop computers. The most commonly used metal materials in MIM process are stainless steel, alloy steel and soft magnetic materials.

Jiehuang MIM, we specialize in MIM parts of stainless steel, low alloy steel material.

Jiehuang MIM can manufacture precision MIM components of different materials according to your needs.

Looking forward to your contact with us

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