SM570 High Strength Low Alloy HSLA Steel

SM570 High Strength Low Alloy HSLA Steel

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SM570 is a low-alloy high-strength steel, with good toughness and weldability, and some also has corrosion resistance, low temperature resistance, etc. SM570 steel plate plate grade: "SM": said the Japanese standard low-alloy high-strength steel; "570": that the steel plate Yield strength is not less than 570MPa; SM570 steel plate implementation standards: the implementation of JISG3106 standard.

 

 

Symbol	Chemical composition
	C max	Si max	Mn	P max	S max
SM570	0.19	0.55	1.6 max	0.035	0.035

 

 

mbol	Yield point or proof stress N/mm2 (min)		Tensile strength N/mm2	Elongation
	Thickness of steel mm		Thickness of steel mm	thinckness	Test piece	% min
	16 or under	Over 16-40	100 or under
SM570	460	450	570-720	<5	NO.5	19
				≥5 <16	NO.5	26
				≥16 <50	NO.5	20

 

 

 

 

 

 

 

 

 

 

Delivered in hot rolled or normalized condition, delivery condition can also be specified according to technical requirements.

Thickness direction performance requirements: Z15, Z25, Z35.

Requirements for flaw detection of steel plate: one, two, three.

Density of steel plate: 7.85/cubic meter.

Rational weight formula: thickness * width * length * density.

 

 

SM570 high strength plate has excellent mechanical properties with high tensile strength, yield strength and elongation. Specifically, the tensile strength of SM570 high strength sheet metal is between 1100-1300 MPa, the yield strength is between 800-900 MPa, and the elongation is between 18%-25%. In addition, SM570 high strength structural steel plate has good bending and welding properties, which can meet various processing and fabrication requirements.

SM570 high tensile alloy steel sheet has good corrosion resistance and can be used in a variety of corrosive environments such as marine environments, industrial atmospheres and chemical media. This is mainly due to its low carbon content and phosphorus and sulfur content, as well as moderate amounts of chromium, molybdenum, copper and other alloying elements added. In practical applications, the corrosion resistance of SM570 high tensile steel sheet is widely recognized and can effectively improve the service life and safety of structures.

 

1.What is SM570 Steel?

SM570 Steel is hot rolled steel for welded structure in the form of plates, sheets & strips for architecture, engineering structures. SM570 steel is a material grade and designation defined in JIS G3106 standard. JIS G3106 is a Japanese material standard for hot rolled steel for welded structure steel plates, sheets, strips for Architecture, Engineering Structures. The hot rolled steel for welded structure SM570 steel is more reliable in its tensile strength than SM520C steel.

 

2.Dimensional Characteristics of SM570 steel

The applicable thickness for this SM570 steel material as defined in the JIS G3106, it is from 6 mm to 300 mm.

 

3.What is SM570 steel equivalent to?

SM570 steel equivalent grades are ST52-3, A572 Gr. 50, EN S355JR and so on. GNEE steel is one of the famous JIS SM570 steel plate suppliers in China. JIS SM570 steel plate offers low yield and tensile strength and is usually supplied in normalized or control rolled delivery condition.

EU EN	USA -	Germany DIN,WNr	Japan JIS	France AFNOR	England BS	European old EN	Italy UNI
S460M (1.8827)	A572Gr.65 A913Gr.65	StE460 StE460TM	SM570	E460R	55C	FeE460KGTM	FeE460KG FeE460KGTM

Applications of SM570 Steel are in manufacturing welded erections, buildings and parks.

 

4.What are the properties of SM570 steel?

SM570 is a strength of 60kgf grade steel which possess excellent low temperature toughness, provides advantages in material saving, weight reducing and optimize available spaces, especially for high rise buildings and large-span truss structural engineering.

 

5.Difference Between SM570 material And A572 Grade 50

SM570 (JIS G3106) and A572 Grade 50 (ASTM) are both high-strength, low-alloy (HSLA) structural steels used for similar applications, such as construction and heavy equipment.

 

A572 Gr 50 is often cited as a common equivalent for SM570.

 

sm570 material VS A572 Grade 50 Comparison of mechanical properties

Property	SM570 (JIS G3106)	A572 Grade 50 (ASTM)
Tensile Strength	570–720 MPa	450–620 MPa
Yield Strength	Minimum 420–460 MPa (varies by thickness)	Minimum 345 MPa
Elongation	Minimum 19% (for plates ≤ 16mm)	Minimum 18% (in 200mm) or 21% (in 50mm)
Toughness (Impact Test)	Standard impact testing at 0°C (32°F) or lower, with minimum energy values specified. This is often a key feature of Japanese standards for welded structures.	Optional impact testing. Unless specifically requested, impact performance is not guaranteed under the base A572 standard.

 

sm570 material VS A572 Grade 50 Comparison of chemical composition

Both steels are HSLA grades with low carbon content to improve weldability. Alloying elements are used to enhance strength and other properties.

Alloying Element	SM570 (JIS G3106)	A572 Grade 50 (ASTM)
Carbon (C)	≤ 0.20%	≤ 0.23%
Manganese (Mn)	≤ 1.50%	≤ 1.35%
Phosphorus (P)	≤ 0.04%	≤ 0.03%
Sulfur (S)	≤ 0.05%	≤ 0.03%
Niobium/Columbium (Nb)	Specified range (e.g., 0.005–0.05%) for grain refinement	Specified range (0.005–0.05%) but optional depending on type
Vanadium (V)	Also specified for strength enhancement	Specified range (0.01–0.15%) but optional depending on type
Copper (Cu)	Optional for improved corrosion resistance	Optional for improved corrosion resistance (weathering grades)

 

Key distinguishing factors

Weldability: Both steels offer good weldability due to their low carbon content. However, the tighter controls on impurities and microalloying in some SM570 variants can offer slightly better weldability for specific applications.

Toughness: The most significant difference is the standard inclusion of low-temperature impact testing for SM570 under the JIS standard. This ensures better performance in dynamic loading or low-temperature environments. For A572 Gr 50, a customer must specifically request and specify impact testing to guarantee similar performance.

Regional standards: While often treated as equivalents, SM570 is a Japanese (JIS) standard, and A572 Gr 50 is a US (ASTM) standard. The manufacturing, quality control, and testing procedures adhere to these respective systems.

Yield strength: SM570 offers a slightly higher minimum yield strength than A572 Gr 50, particularly at thinner plate dimensions. This allows for a more efficient strength-to-weight ratio in some design scenarios.

Conclusion

While SM570 and A572 Grade 50 can be substituted for each other in many general structural applications, SM570 provides stricter guarantees on material performance. If an application requires guaranteed low-temperature toughness or higher strength at thinner plate dimensions, SM570 is the more reliable choice under its standard specification. A designer would need to explicitly request and verify these properties from a supplier of A572 Gr 50 to ensure comparable performance.

 

6.ASTM A572 Grade 50 vs S355JR

ASTM A572 Grade 50 and S355JR are both high-strength low-alloy structural steel grades used in a variety of applications. Here's a comparison between these two grades:

 

ASTM A572 Grade 50

Chemical Composition:Carbon (C): 0.23%Manganese (Mn): 1.35%Phosphorus (P): 0.04% maxSulfur (S): 0.05% maxSilicon (Si): 0.40% maxCopper (Cu): 0.20% min (when specified)Niobium (Nb): 0.005-0.05% (when specified)

Mechanical Properties:Tensile Strength: 450-620 MPa (65-90 ksi)Yield Strength: 345 MPa (50 ksi) minElongation: 18% min in 8", 22% min in 2"

Applications:ASTM A572 Grade 50 is used in bridges, buildings, construction equipment, freight cars, machinery, truck parts, and transmission towers where high strength and improved weldability are required.

 

S355JR (EN 10025-2)

Chemical Composition:Carbon (C): 0.24%Manganese (Mn): 1.60%Phosphorus (P): 0.035% maxSulfur (S): 0.035% maxSilicon (Si): 0.55% max

Mechanical Properties:Tensile Strength: 470-630 MPaYield Strength: 355 MPa minElongation: 20% min in 8", 22% min in 2"

Applications:S355JR is a widely used structural steel grade in Europe and is typically used in general construction and engineering structures, such as bridges, ships, power plants, and building structures.

 

Comparison

Chemical Composition: ASTM A572 Grade 50 and S355JR have similar carbon content but differ slightly in manganese and other alloying elements. The slight differences can influence their mechanical properties and weldability.

Mechanical Properties: Both grades have a minimum yield strength of 355 MPa, but ASTM A572 Grade 50 offers a higher tensile strength range, making it suitable for slightly more demanding applications.

Applications: ASTM A572 Grade 50 is commonly used in heavier construction applications requiring higher strength, while S355JR is versatile and widely used in various structural applications across Europe.

 

In summary, both ASTM A572 Grade 50 and S355JR are excellent choices for structural steel applications, with ASTM A572 Grade 50 providing higher strength capabilities and S355JR offering versatility and widespread use in European construction projects. The choice between them would depend on specific project requirements, regional standards, and application needs.

 

 

 

 

 

 

We have enough SM570 High Strength Low Alloy HSLA Steel in stock, and we can also customize it according to your needs.

 

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