JIS G3321

JIS G3321

JIS G3321 Standard specifies requirements for hot-dip 55 % aluminium-zinc alloy-coated steel sheets (hereafter referred to as sheets), hot-dip 55 % aluminium-zinc alloy-coated steel strips (hereafter referred to as coils), and corrugated steel sheets manufactured by processing sheets into the shapes and dimensions specified in JIS G 3316 (hereafter referred to as corrugated sheets)

This Standard specifies requirements for hot-dip zinc-coated steel sheets (hereafter referred to as sheets), steel strips (hereafter referred to as coils), and corrugated steel sheets manufactured by processing sheets into the shapes and dimensions specified in JIS G 3316 (hereafter referred to as corrugated sheets).

Hot-dip aluminum-zinc-silicon steel, also called alu-zinc, galvalume (GL for short), is a steel sheet made of aluminum(Al 55%), zinc (Zn 43.5%), and silicon (Si 1.5%) alloy on both sides. The surface of galvalume coil has small and uniform aluminum-zinc spangle, bright color, and high surface hardness. Hot dipped galvalume steel coil can be coated with various colors of anti-finger print (AFP) semi permeable films. 

Hot dipped galvalume/aluzinc steel coil have better corrosion resistance, heat resistance, and heat reflection properties, compared to traditional galvanized steel products. GL galvalume steel coil are widely used in industries such as home appliances, construction, structures, and electrical appliances.

JIS G3321

JIS G3321 Equivalent

Chinese standard: GBT 14978

European standard: EN10215

American standard: ASTM A792M

What is SLGCC?

 SGlCC steel is a soft forming quality hot dip galvalume steel coil. SGLCC is a material grade and designation defined in JIS G 3321 standard. JIS G 3321 is a Japanese material standard for hot dip galvanized steels. The commercial quality hot dip galvanized steel is a type of steel that can be made after galvanizing a coil of SPCC cold rolled material.

JIS G3321 Specification

Based on Hot-roll Steel Sheet:

GradeThickness Range(mm)Application
SGLHC        1.60 ~ 2.30Commercial
SGLH400      High strength commercial
SGLH490

Based on Cold-roll Sheet:

GradeNominal ThicknessApplication
SGLCC0.24 ~ 2.3Commercial Hard
SGLCD0.27 ~ 1.6Drawing
SGLCDD0.40 ~ 1.6Deep Drawing
SGLC400 0.25 ~ 2.3    Structural Quality
SGLC440
SGLC490
SGLC5700.19 ~ 2.0

JIS G3321 Chemical Composition

GradeCMnPS
SGLHC0.15max.0.80max.0.05max.0.05max.
SGLH4000.25max.1.70max.0.20max.0.05max.
SGLH4900.30max.2.00max.0.20max.0.05max.
SGLCC0.15max.0.80max.0.05max.0.05max.
SGLCD0.10max.0.45max.0.03max.0.03max.
SGLCDD0.08max.0.45max.0.03max.0.03max.
SGLC4000.25max.1.70max.0.20max.0.05max.
SGLC4400.25max.2.00max.0.20max.0.05max.
SGLC4900.30max.2.00max.0.20max.0.05max.
SGLC5700.30max.2.50max.0.20max.0.05max.

JIS G3321 Mechanical properties

 

Tensile test characteristics

Based on Hot-Roll Sheet(units:%):

GradeYield strengthTensile strengthElongation %
N/mm2N/mm2 
SGLHC
SGLH400295 Min400 Min18 Min
SGLH490365 Min490 Min16 Min

NOTE 1 For SGLHC, a yield point or proof stress of 205 N/mm2 or over and a tensile strength of 270 N/mm2 or over may be used.

NOTE 2 1 N/mm2 = 1 MPa

Based on Cold-Roll Sheet (units:%):

GradeYield strengthTensile strengthElongation %
N/mm2N/mm2Thickness
0.25-0.4MM0.4-0.6MM0.6-1.0MM1.0-1.6MM1.6-2.3MM
SGLCC
SGLCD270 Min27 Min31 Min32 Min33 Min
SGLCDD270 Min29 Min32 Min34 Min35 Min
SGLC400295 Min400 Min16 Min17 Min18 Min18 Min18 Min
SGLC440335 Min440 Min14 Min15 Min16 Min18 Min18 Min
SGLC490365 Min490 Min12 Min13 Min14 Min16 Min16 Min
SGLC570560 Min570 Min

NOTE 1 For SGLCC, a yield point or proof stress of 205 N/mm2 or over and a tensile strength of 270 N/mm2 or over may be used.

NOTE 2 1 N/mm2 = 1 MPa Note a) The sheets and coils of SGCD4 shall be free from stretcher strain marks when being formed, for a period of six months after manufacture.

Thickness Tolerances

Tolerances on product thickness Tolerances on product thickness 

Thickness MMWidth MM
Under 630630-10001000-12501250-1400
Under 0.250.040.040.040.04
0.25-0.400.050.050.050.06
0.40-0.600.060.060.060.07
0.60-0.800.070.070.070.07
0.80-1.000.070.070.080.09
1.00-1.250.080.080.090.1
1.25-1.600.090.10.110.12
1.60-2.000.110.120.130.14
2.00-2.300.130.140.150.16

Coating Mass

The coating applied shall be of equivalent thickness on both surfaces.

Design Coating Mass Table

Design Coating MassAverage Triple-Spot TestSing-Spot Test
AZ707060
AZ909076
AZ120120102
AZ150150130
AZ170170145
AZ185185160
AZ200200170

This is the main description about the JIS G3321 production standard. I hope it will be helpful to you know about the JIS G3321 of Hot dipped galvalume steel coil or Aluzinc Steel Coil. If you are looking for Steel suppliers or Looking for other Steeel products, Welcome to contact us at any time and we will prefer to provide more service.

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