TECHNICAL INFORMATION

NSSC550

NSSC550 screws are martensitic grade with remarkably enhanced quench hardening.

1. High Strength :
Achieves high fastening power and no change in thread shape during tapping due to high centre hardness.

2. Super Toughness :
Achieves excellent high toughness by using an appropriate combination of components.

3. High corrosion resistance :
Superiority to the standard SUS304 in corrosion resistance achieved by the appropriate addition of Cr, Mo and N, as well as the control of trace elements.

* NSSC550 was developed by Nippon Steel & Sumikin Stainless Steel Corporation.

CATALOG DOWNLOAD (PDF)

Products

SUNLOCK-550

SUNLOCK-550

Non-circular & Low torque tapping screw

EXCEL-550

EXCEL-550

Self drilling screw

EXCEL-550 (specified Thick plate)

EXCEL-550
(specified Thick plate)

Non-circular & Low torque self drilling screw

1.Ingredients

C Ni Cr Mo N
0.10-0.20 1.00-2.40 12.50-14.00 1.80-2.30 0.50-0.15

* Source : Nippon Steel & Sumikin Stainless Steel Corporation

2.Physical properties

Longitudinal
elastic modulus
N/mm2
Transverse
elastic modulus
N/mm2
Density
g/mm2
Thermal expansion
coefficient
x10-6/
2.05×105 7.94×104 7.75 11.5

* Source : Nippon Steel & Sumikin Stainless Steel Corporation

3.Mechanical properties

Tensile strength
N/mm2
Shear Strength
N/mm2
Surface
hardness HV
Core hardness
HV
Head toughness
test
1650 1100 550 515 EXCELLENT

*Source : Maruemu Works Co., Ltd.

4.Corrosion resistance

Pitting corrosion potential

Pitting corrosion potential

* Source : Nippon Steel & Sumikin Stainless Steel Corporation

Salt spray test (ISO9227, 1000h)
SUS410

SUS410

NSSC550

NSSC550

* Source : Maruemu Works Co., Ltd.
* NSSC550 series have a "V" on the head as a mark.
NSSC550 also got the same result by Kestenich (Sulfur Dioxide) test (DIN 50018, 20cycles).

Precautions

1) Test data should be used only as a reference.
2) NSSC550 must not be used at temperature above 200 and highly corrosive environments.

Should you have any questions, please contact us through any of following channels.

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Technical information