GNEE Steel automotive stainless steel
SAPH440 steel is structural cold-rolled steel in the form of plates, sheets & strips for automobile structural applications. SAPH440 is a material grade and designation defined in JIS G 3113 standard. JIS G 3113 is a Japanese material standard for Cold-Rolled steel plates, sheets, strips for automobile structural usage. The structural quality hot rolled SAPH440 steel is more reliable in its tensile strength than SAPH400 steel. It can be used in automotive applications where more strength is needed & the material does not fail under exceeding loading.
SAPH310/SAPH370 steel Mechanical properties
|
Symbol |
Elongation (rolling direction)% |
Bendability |
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|
NO.5 test piece |
No.1A test piece |
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|
≥1.6 <2mm |
≥2.0 <2.5mm |
≥2.5 <3.15mm |
≥3.15 <4.0mm |
≥4.0 <6.3mm |
≥6.3mm |
Bending angle |
Inside Radius |
Test piece |
||
|
<2.0mm |
≥2.0 mm |
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|
SAPH310 |
33 |
34 |
36 |
38 |
40 |
26 |
180° |
Flat on itself |
Thickness x 1.0 |
No.3 transversely to rolling direction |
|
SAPH370 |
32 |
33 |
35 |
36 |
37 |
25 |
180° |
-Thickness x 0.5 |
Thickness x 1.0 |
|
|
SAPH400 |
31 |
32 |
34 |
35 |
36 |
24 |
180° |
Thickness x 1.0 |
-Thickness x 1.0 |
|
|
SAPH440 |
29 |
30 |
32 |
33 |
34 |
22 |
180° |
Thickness x 1.0 |
Thickness x 1.5 |
|
THE CHEMICAL COMPOSITION OF SAPH440 STEELS
JIS G 3113 defines the chemical composition of SAPH440 steels as under:
Carbon (C) is not identified in the standard.
Manganese (Mn) is not identified in the standard.
Maximum percentage of Phosphorous (P) is 0.040 percent.
Maximum percentage of Sulphur (S) is 0.040 percent.
Remaining is iron (Fe) percentage and with few negligible impurities.
MECHANICAL PROPERTIES OF SAPH440 STEELS
The tensile strength of the SAPH440 Steels is expressed in Newton per millimeters and it must be at least 440 N/mm2 (MPa).
The yield strength is minimum 275 to minimum 305 N/mm2 (MPa) depending on the thickness.
The elongation property of SAPH440 steel varies with the ranges of thickness. The minimum percentage ranges for elongation is 29 to 34 minimum. Only over 6.5 mm thickness requires 22 minimum percentage elongations. Higher thickness gauges usually show higher elongation than lower gauges.
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GNEE Steel is a leading international manufacturer of steel products. We provide raw materials, semi-finished and finished steel products for construction and architecture, home appliance, furniture, automobile, machinery manufacturing, advertising, and other industries. At GNEE Steel, there is a wide range of surface treatment methods, coating or painting types, base metal, steel grades, sizes, colors or patterns, and designs to meet different application needs. We also have some new materials, like nano-coated steel, to better meet your requirements.
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