JIS G3114 SMA 50 AW structural weathering steel plate - Knowledge

SMA 50 AW Steel Description

SMA 50 AW steel is a structural weathering steel which is also referred to as atmospheric corrosion resistant steel. SMA 50 AW steel chemical composition can increase resistance to atmospheric corrosion compared to other steels.

SMA 50 AW Steel

This is because it forms a protective layer on SMA 50 AW steel surface under the influence of the weather, So which could more accurately be termed as an "Atmospheric Corrosion Resistant Steel".

SMA 50 AW steel Delivery condition

Hot Rolled, Cold Rolled, Normalized, Quenched, Tempering, Thermal Mechanical Control Process (TMCP), Electroslag Remelting Technical, HIC test.

SMA 50 AW steel application

Due to the super property, SMA 50 AW steel has a widely use in Mine fans, earth moving buckets, trailers and large road vehicles, drill rings, cranes, excavators, underground mining equipment, bridges and other high strength components requiring superior toughness.

SMA 50 AW Steel Application

SMA 50 AW steel chemical composition by [%]

CEV

Max 0.16

Max 0.5

0.5 - 1.5

Max 0.035

0.4 -0.8

Max 0.009

0.25-0.55

Max 0.52

*Note:
1. The steels may show a Ni content of max 0.65 %;

2. For long SMA 50 AW steel, the P and S content can be 0.005% higher;

3. The SMA 50 AW steel may contain max. 0.30 % Mo and max. 0.15 % Zr

4. It is permissible to exceed the specified values provided that for each increase of 0.001 % N, the P max. content will be reduced by 0.005 %; the N content of the ladle analysis, however, shall not be more than 0.012 %

5.The max. value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0.020 % or if sufficient other N binding elements are present.

SMA 50 AW steel Mechanical properties

Nominal thickness (mm)	to 16	16-40	40-63	63-80	80-100	100-150
ReH - Minimum yield strength (MPa)	355	345	335	325	315	295
Nominal thickness (mm)	To 3		3-100		100-150
Rm -Tensile strength (MPa)	510-680		470-630		450-600
Nominal thickness (mm)	3-40		40-63		63-100	100-150
A - Minimum elongation Lo = 5,65 √ So (%)	22		21		20	18
Nominal thickness (mm)	1.5 - 2		2-2.5		2.5-3
A - Minimum elongation Lo = Lo = 80 mm (%)	16		17		18
Temperature	-20			0
Notch impact test. Min. absorbed energy	27			27

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JIS G3114 SMA 50 AW