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Japan buy LY authentic 304 stainless steel expansion screw pull pull screw M6-M8-M10-M12-M14-16

price:USD$779.00
discount 70% in 2018-09-21 to 2018-09-23
price: USD$ 545.30
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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膨胀螺丝系列-1 

DIN934-1
There are positive and negative tolerances, especially for the beat. The reference specifications are made up of D*L (screw diameter * total length)Setting: mm
Conventional model
The total length is L (mm)
The length of casing is l (mm)
The screw diameter is D (mm)
The casing diameter is d (mm)
Punching size (mm)
M6*50
50
35
6
8
8mm bit drilling
M6*60
60
40
6
8
M6*70
70
50
6
8
M6*80
80
55
6
8
 
M8*60
60
40
8
10
10mm bit drilling
M8*70
70
50
8
10
M8*80
80
55
8
10
M8*100
100
70
8
10
M8*120
120
90
8
10
 
M10*60
60
35
10
12
12mm bit drilling
M10*70
70
45
10
12
M10*80
80
55
10
12
M10*100
100
75
10
12
M10*120
120
90
10
12
 
M12*80
80
50
12
16
16mm bit drilling
M12*100
100
70
12
16
M12*120
120
90
12
16
 
M14*100
100
60
14
18
18mm bit drilling
M14*120
120
80
14
18
M12*150
150
100
14
18
 
M16*100
100
60
16
20
20mm bit drilling
M16*120
120
80
16
20
M16*150
150
100
16
20
The reference specifications consist of D*L (screw diameter * screw length), positive and negative tolerances, and mind care

Chemical composition,%, Max
group C Si Mn P S Cr Mo Ni Cu Characteristic
304-A2 0.1 1 2 0.05 0.03 15-20   8-19 4

The work hardening rate is moderate, suitable for general cold room processing and stretching, cold processing performance is good, widely used in the outer six corners screw, nut and washer products

316-A4 0.08 1 2 0.045 0.03 16-18.5 2-3 10-15 1

With molybdenum, the corrosion resistance is better than 304, especially suitable for seawater and chemical media, more corrosion resistance and pitting resistance.

Note:

1) if the content of nickel is less than 8%, the minimum content of manganese must be 5%
2) the minimum content of copper is not limited when the nickel content is greater than 8%
3) when the chromium content is below 17%, the minimum content of nickel is 12%
4) for the austenitic stainless steel with the largest carbon content of 0.03%, the nitrogen content can reach 0.22
5) for larger diameter products, in order to achieve the specified mechanical properties, in the manufacturer's manual, there may be a higher carbon content, but the martensitic steel should not exceed 0.12%

Mechanical properties
category group Performance grade Screw nominal diameter Tensile strength mpa/mm2 Non proportional elongation should be mpa/mm2 After the elongation of mpa/mm2
austenite A2,A4 50

≤ 39

500 210 0.6d
70

≤ 24

700 450 0.4d
80

≤ 24

800 600 0.3d

Question 1

Why does 1. stainless steel bring magnetism?

304 stainless steel belongs to austenitic stainless steel, austenite in cold processing part or a small amount into martensite, martensite is magnetic, so 304 stainless steel is non-magnetic or micro magnetic. Specific Baidu inquiry 304 stainless steel why magnetic?.

Question 2

2. how to identify authentic 304 stainless steel products?

Support the detection of 304 stainless steel special detection liquid, if not change color as authentic 304 stainless steel.304药水小标-1
Support chemical composition analysis and spectrum analysis.激光药水小标-1
Support smoke test, simulate the actual use environment.

Question 3

3. what are the most commonly used stainless steel?

201 stainless steel, suitable for use in a dry environment, water easily rust.
304 stainless steel, outdoor or humid environment, corrosion resistance, strong acid resistance.
316 stainless steel and molybdenum, more corrosion resistance and pitting corrosion resistance, especially suitable for seawater and chemical media.

Since 2003, the world stainless steel raw material prices, cheap stainless steel domestic market there is a kind of "low nickel" (Ni Ni1.5-4.5%) of austenitic stainless steel, the price is about 15%-40% lower than 304 stainless steel, corrosion proof capability is relatively low, superior products are full power 304 or 316 austenitic stainless steel products.