HR2 steel coil, as a high-quality hot-rolled steel, has shown excellent performance in all walks of life due to its unique material characteristics. However, to have a deeper understanding of HR2 steel coil, we need to further explore its chemical composition, mechanical properties and application scenarios.

First of all, from the chemical composition point of view, HR2 steel coil is mainly composed of iron, carbon and a small amount of silicon, manganese, phosphorus, sulfur and other elements. This ratio makes HR2 steel coil have excellent mechanical properties and processing properties. Among them, the carbon content has a decisive influence on the hardness and strength of steel, while elements such as silicon and manganese help to improve the toughness and wear resistance of steel.

In terms of mechanical properties, HR2 steel coil shows excellent strength and toughness. Its tensile strength and yield strength are both high, which enables it to withstand large external forces without deformation or fracture. At the same time, HR2 steel coil also has good ductility and impact toughness, which enables it to maintain good stability when subjected to shock or vibration.

In terms of application scenarios, HR2 steel coil is widely used in construction, automobiles, ships, bridges, machinery manufacturing and other fields. In the construction field, HR2 steel coils are often used to make structural parts such as beams, columns, and plates. Their excellent mechanical properties ensure the stability and safety of building structures. In the automotive field, HR2 steel coils are used to manufacture parts such as car bodies and chassis. Their good processing performance and strength make cars more durable.

In general, HR2 steel coils have become an indispensable high-quality material in modern industry with their unique material properties and a wide range of application scenarios. In the future, with the advancement of science and technology and the development of industry, the application field of HR2 steel coils will be further broadened.

As a key material in the power industry, silicon steel sheet B35AH270 is increasingly used in fields such as power transformers and generators. Its unique electromagnetic and mechanical properties make it play an irreplaceable role in the process of power transmission and conversion. However, with the continuous development and innovation of power industry technology, the performance requirements for silicon steel sheet B35AH270 are also increasing. In order to meet this demand, researchers are constantly exploring new preparation processes and modification methods to further improve the performance of silicon steel sheet B35AH270. In terms of preparation technology, researchers have optimized process parameters such as smelting, rolling and heat treatment to make the microstructure of silicon steel sheet B35AH270 more uniform and the grain size smaller, thereby improving its electromagnetic and mechanical properties. At the same time, they also adopted some advanced surface treatment technologies, such as laser etching and ion implantation, to further improve the surface quality and corrosion resistance of silicon steel sheet B35AH270. In terms of modification methods, researchers have improved the magnetic and mechanical properties of silicon steel sheet B35AH270 by adding rare earth elements and alloy elements. These modification methods can not only improve the magnetic permeability and saturation magnetic induction intensity of silicon steel sheet B35AH270, but also reduce its iron loss and hysteresis loss, thereby improving the efficiency and reliability of power equipment. Looking to the future, the application prospects of silicon steel sheet B35AH270 in the power industry will be broader. With the rapid development of new energy, smart grid and other fields, the performance requirements for power equipment will continue to increase, and silicon steel sheet B35AH270, as a high-performance electromagnetic material, will play a more important role in it.

Baosteel 5-meter heavy plate mill was established in March 2005, with the annual production capacity of 1.8 million tons. Its main production equipments are provided by German SMS and SIE. The 5-meter heavy plate mill extensively adopts the state of-the-art heavy plate technologies and facilities in the world, including high precision of rolling technique, TMCP/DQ technology, automatic control technique for strong leveling process, automatic cutting technique, automatic online ultrasonic detective tech nique, non-oxidation heat treatment technique, pre-leveler, comprehensive plate surface measuring apparatus and automatic marking, etc. In this way, requirements of high dimensional accuracy and mechanical property for high grade heavy steel plates from customers can be satisfied. The heavy plate mill can produce high strength machinery structure steel, hull structural steel plates, offshore structural steel plates, oil and gas transportation pipeline steel plates, high strength construction structural steel plates and steel plates for boilers and pressure vessels. In the past decade Baosteel has exerted utmost effort to develop and supply high-quality heavy plates to meet customers’ demands. We are continuously expanding our products types, improving our products quality. A Variety of Available Grades A total of 9 grades are available: the basic series with 2 grades of hardness, and the alloy series with 4 grades, and the easy weld ing series with 3 grades, providing a complete product line that can meet a wide range of applications. Basic Series This series consists of grades pro duced with the main emphasis on their hardness levels, the chemical composition being basically simple while the addition of other alloying elements is restrained. Alloy Series This series contains alloying elements in greater quantities than the basic series. Both the prescribed hardness and low-temperature toughness are guaranteed. Easy Welding Series This series contains restrained con tents of carbon and alloying elements. The value of CEV is lower than the standard series and the alloy series, which is good to welding. Grade and Specifications

Typical Grade and Specifications for B-HARD
Grade	Specifications
	Thickness, mm	Width, mm	Length, mm
B-HARD360A/B (Basic type)	6-90	1300-4200	6000-25000
B-HARD360C/D/E (Alloy type)	6-80	1300-4200	6000-25000
B-HARD360CFA/B/C/D/E (Easy welding)	6--20	1300-4200	6000-25000
B-HARD400A/B (Basic type)	6-90	1300-4200	6000-25000
B-HARD400C/D/E (Alloy type)	6-80	1300-4200	6000-25000
B-HARD400CFA/B/C/D/E (Easy welding)	6--20	1300-4200	6000-25000
B-HARD450A/B/C/D/E (Alloy type)	6-75	1300-4200	6000-25000
B-HARD450CFA/B/C/D/E (Easy welding)	6--20	1300-4200	6000-25000
B-HARD500A/B/C/D/E (Alloy type)	6-75	1300-4200	6000-25000

Chemical Composition

Typical Chemical Composition for B-HARD
Grade	Chemical Composition wt.%											CEVa
	C≤	Si≤	Mn≤	P≤	S≤	Cr≤	Mo≤	Ni≤	Ti≤	Alt≥	B≤	≤
B-HARD360 (Basic type)	0.2	0.6	1.6	0.025	0.015	0.8	0.3	0.2	0.05	0.015	0.005	0.55
B-HARD360 (Alloy type)	0.2	0.6	1.6	0.025	0.015	0.8	0.5	0.8	0.05	0.015	0.005	0.58
B-HARD360CF (Easy welding)	0.18	0.6	1.8	0.025	0.015	0.6	0.3	0.5	0.05	0.015	0.005	0.52
B-HARD400 (Basic type)	0.2	0.6	1.6	0.025	0.015	0.8	0.3	0.2	0.05	0.015	0.005	0.56
B-HARD400 (Alloy type)	0.2	0.6	1.6	0.025	0.015	0.8	0.5	0.8	0.05	0.015	0.005	0.6
B-HARD400CF (Easy welding)	0.18	0.6	1.8	0.025	0.015	0.6	0.3	0.5	0.05	0.015	0.005	0.53
B-HARD450 (Alloy type)	0.25	0.7	1.6	0.02	0.01	1	0.8	0.8	0.05	0.015	0.005	0.65
B-HARD450CF (Easy welding)	0.22	0.7	1.6	0.02	0.01	0.6	0.5	0.5	0.05	0.015	0.005	0.63
B-HARD500 (Alloy type)	0.3	0.7	1.6	0.02	0.01	1.5	1	1	0.05	0.015	0.005	0.7

According to a report released by the International Stainless Steel Forum (ISSF). Preliminary statistics show that world stainless steel crude steel production increased by 7.8% month-on-month to 14.76 million tons in the second quarter of this year, while it fell by 1.7% to 28.4 million tons in the first half of the year. ISSF data shows that China's stainless steel crude steel production increased by 8.2% in the first half of this year, while stainless steel crude steel production in Asia except China and South Korea fell by 14.6%, the United States fell by 13.5%, and fell by 13.4%.

Chemical composition of soft steels in mass percent
Material	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Al (%)	Ti (%)
VW50065 CR5	≤ 0.02	≤ 0.50	≤ 0.30	≤ 0.020	≤ 0.020	≥ 0.010	≤ 0.30
Mechanical properties of soft steels (testing in transverse direction)
Material	Proof stress  R(p0.2)	Tensile strength R(m)	Elongation at break			r		n (10-20/Ag)
	MPa	MPa	A	A (50 mm)	A (80 mm)	r(90/20)	r(m/20)
			%	%	%
VW50065 CR5	110-170	260-330	－	≥ 42	≥ 41	≥ 2.1	≥ 1.8	≥ 0.22

Chemical composition of soft steels in mass percent
Material	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Al (%)	Ti (%)
VW50065 CR4	≤ 0.06	≤ 0.50	≤ 0.40	≤ 0.025	≤ 0.025	≥ 0.010	≤ 0.30
Mechanical properties of soft steels (testing in transverse direction)
Material	Proof stress  R(p0.2)	Tensile strength R(m)	Elongation at break			r		n (10-20/Ag)
	MPa	MPa	A	A (50 mm)	A (80 mm)	r(90/20)	r(m/20)
			%	%	%
VW50065 CR4	140-180	270-330	－	≥ 40	≥ 39	≥ 1.9	≥ 1.6	≥ 0.20

Chemical composition of soft steels in mass percent
Material	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Al (%)	Ti (%)
VW50065 CR3	≤ 0.08	≤ 0.50	≤ 0.50	≤ 0.030	≤ 0.030	≥ 0.010	≤ 0.30
Mechanical properties of soft steels (testing in transverse direction)
Material	Proof stress  R(p0.2)	Tensile strength R(m)	Elongation at break			r		n (10-20/Ag)
	MPa	MPa	A	A (50 mm)	A (80 mm)	r(90/20)	r(m/20)
			%	%	%
VW50065 CR3	140-210	270-350	－	≥ 38	≥ 38	≥ 1.8	≥ 1.5	≥ 0.18

Chemical composition of soft steels in mass percent
Material	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Al (%)	Ti (%)
VW50065 CR2	≤ 0.10	≤ 0.50	≤ 0.50	≤ 0.065	≤ 0.045	≥ 0.010	－
Mechanical properties of soft steels (testing in transverse direction)
Material	Proof	Tensile	Elongation at break			r		n10 – 20/Ag
	stress Rp0.2	strength Rm	A	A50 mm	A80 mm	r90/20	rm/20
	MPa	MPa	%	%	%
VW50065 CR2	140-240	270-370	－	≥ 34	≥ 34	≥ 1.3	≥ 1.2	≥ 0.16

Chemical composition of soft steels in mass percent
Material	C (%)	Si (%)	Mn (%)	P (%)	S (%)	Al (%)	Ti (%)
VW50065 CR1	≤ 0.12	≤ 0.50	≤ 0.60	≤ 0.065	≤ 0.045	≥ 0.010	－

Mechanical properties of soft steels (testing in transverse direction)
Material	Proof	Tensile	Elongation at break			r		n10 – 20/Ag
	stress Rp0.2	strength Rm	A	A50 mm	A80 mm	r90/20	rm/20
	MPa	MPa	%	%	%
VW50065 CR1	140-300	270-410	－	≥ 30	≥ 28	－	－	－

On the 25th local time, Mike Johnson, a Republican congressman from Louisiana, received 220 votes in the election of Speaker of the House of Representatives and was elected as the new Speaker of the House of Representatives. Democratic candidate Hakeem Jeffries received 209 votes. Johnson is currently the vice chairman of the House of Representatives Republican Conference and was selected as the Republican candidate for speaker on the evening of the 24th.