Nakayama Mitsuboshi Steel Products, Ltd.  Nakayama Mitsuboshi Steel Products, Ltd.
 Nakayama Mitsuboshi Steel Products, Ltd.

Carbon steel square and rectangular tubes for general structure

 Carbon steel square and rectangular tubes for  general structure  (dark grey)

Carbon steel square and rectangular tubes for general structure for general structure (dark grey)

 Carbon steel square and rectangular tubes for  general structure  (red rust)

Carbon steel square and rectangular tubes for general structure for general structure(red rust)

 Carbon steel square and rectangular tubes for  general structure  (black)

Carbon steel square and rectangular tubes for general structure for general structure (black)

 Carbon steel square and rectangular tubes for  general structure  (plating)

Carbon steel square and rectangular tubes for general structure for general structure (plating)

 Carbon steel square and rectangular tubes for  general structure  (dark grey)
 Carbon steel square and rectangular tubes for  general structure  (red rust)
 Carbon steel square and rectangular tubes for  general structure  (black)
 Carbon steel square and rectangular tubes for  general structure  (plating)
Drawing

Carbon steel square and rectangular tubes for general structure

Carbon steel square and rectangular tubes for general structure is manufactured at our Shimizu, Sakai, Oita and Miyakonojo factories mainly for construction industry. It is also widely used in farming and gardening greenhouses and temporary construction site. In addition to black products, color products and pre-plated (Hot-dip zinc) products are available.

Application
  • Civil engineering, construction of buildings and other structures

 
Feature
  • 1. Thanks to high ratio of cross-sectional performance to the mass, it contributes to weight-saving in a structure.
  • 2. Steel strip used in the products is mainly manufactured by slit coils of Nakayama Steel Works, Ltd.
  • 3. In addition to a great selection of products, we can deal with products with a special specification as well.
  • 4. We also undertake other metal processing like cutting, drilling, notching, etc.
Manufacturing facilities Authentication number Authentication date Product name (JIS Number)
Shimizu factory QA0508007 May 20, 2008 Carbon steel square and rectangular tubes for general structure
(JIS G 3466)
Sakai factory
Oita factory
Miyakonojo factory

Color product

  • POINT01

    Jointly developed paints are used.

    The paint used was developed jointly by our company and a paint manufacturer and is mainly used for primary rust prevention.

  • POINT02

    Automatic line painting

    The entire surface is painted on the automated paint line, making it possible to apply a second coat on the site immediately.

About paint

Nami coat mitsuboshi 74 Aqua coat
JIS K 5674 class 2 (※1) qualified products

  Dark gray
Products in stock (N5 approximation)
  Red rust
Products in stock (10 R 3.5/7.5 approximation)

Namicoat P-1
JIS K 5621 (※2)
Equivalent to class2 and class 4

  Red rust
Products in stock (10 R 3.5/7.5 approximation)

(※1) JIS K 5674 "Lead- and Chromium-free anticorrosive paint" <Class 2: aqueous>
(※2) JIS K 5621 "General anticorrosive paint"

  • 01 The color of the swatch may differ from ones of actual products.
  • 02 The coating thickness of the painted product does not conform with the Building Construction Standard Specification (JASS).
  • 03 The following are available as repair paints for processed products such as furring strips and others.
    "74 Aqua repair paint dark gray" JIS K 5674 class 1: Nipponpaint Industrial Coatings Co., Ltd.
  • 04 In response to the customer's request to match the hue of the steel frame body with the dark gray product, the manufacturer has a line-up of the following paints as standard colors.
    "Green bosei quick-drying super-quick drying MK dark gray" JIS K 5674 class 1: Dai Nippon Toryo Co., Ltd.

Hot-dip zinc-coated steel strip products

  • POINT01

    Excellent corrosion resistance

    Even if the zinc coating is broken, partly exposing the iron base, the surrounding area is protected from rust by the sacrificial anticorrosion effect of zinc until the area reaches a certain size.

  • POINT02

    Beautifully finished surface

    Zinc has excellent adhesion and uniformity. The lubricating effect of zinc makes it easy for molding and generate graceful finished surface.

Types of hot-dip zinc-coated steel strip

JIS standard products

SGHC
SGH340
SGH400
SGH440
SGH490
SGH540
Minimum coating mass(total mass on both surfaces)
Type of coating Non-alloyed coating Alloyed coating
Coating mass symbol Z12 Z18 Z20 Z22 Z25 Z27 F12 F18
MInimum average coating mass at triple spots 120 180 200 220 250 275 120 180
Minimum coating mass at single spot 102 153 170 187 213 234 102 153
  • 01 Please consult with us in advance as the bolded part in the table are standard products and the others are build-to-order ones.
  • 02 The mInimum average coating mass at triple spots is applied to the average of the measured values of the three specimens taken from sample materials.
  • 03 The following are available as repair paints for processed products such as furring strips and others.
    "74 Aqua repair paint dark gray" JIS K 5674 class 1: Nipponpaint Industrial Coatings Co., Ltd.
  • 04 Alloyed coating is a process in which zinc-iron alloy is coated over the entire plating layer, consisting of mainly δ1 phase (Iron content of 7% to 16%).
  • 05 When top coat is required, use of alloyed coating is recommended.