High Toughness High-Quality Round Steel 1.7335/ASTM A182 F11 F12 Round Steel 13crmo44 Round Alloy Steel Bar

• Type: Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Carbon Steel
• Technique: Hot Rolled
• Shape: Bar
• Surface Treatment: Blace/Polishing/Oiling or Galvanizing/ etc
• Model NO.: 1.7335/ASTM A182 F11 F12
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Wear-Resistant Steel, Cold Heading Steel, Free-Cut
• Delivery Conditions: Forging/Hot Rolling/Cold Drawing
• Heat Treatment: Annealing/Normalizing/Q+T
• Testing: Physical Properties, Flaw Detection
• Delivery Date: 7-20days
• Transport Package: Standard Seaworthy Export Packaging or as Required
• Specification: 3000-9000mm
• Trademark: meide
• Origin: Shandong, China
• HS Code: 84802000
• Production Capacity: 1000 Ton/Month

Product Description

About products

The alloy structural steel has proper hardenability. After proper metal heat treatment, its microstructure is uniform sorbite, bainite or extremely fine pearlite, so it has higher tensile strength and yield strength ratio (generally about 0.85), higher toughness and fatigue strength, and lower ductile brittle transition temperature. It can be used to manufacture machine parts with large section size. Alloy structural steel is generally divided into quenched and tempered structural steel and case hardened structural steel.
1. The carbon content of quenched and tempered structural steel is generally about 0.25%~0.55%. For structural parts with a given section size, if they are quenched and tempered along the section, the mechanical properties are good. If they are not quenched and there is free ferrite in the microstructure, the toughness is reduced. For steel with temper brittleness tendency, such as manganese steel, chromium steel, nickel chromium steel, etc., it shall be cooled quickly after tempering. The quenching critical diameter of this kind of steel increases with the increase of grain size and alloying element content. For example, 40Cr and 35SiMn steels are about 30~40mm, while 40CrNiMo and 30CrNi2MoV steels are about 60~100mm. They are commonly used to manufacture structural parts such as shafts and connecting rods that bear large loads.
2. Case hardened structural steel is used to manufacture parts with hard and wear-resistant surface and flexible core, such as gears and shafts. In order to make the parts have high toughness in the core, the carbon content in the steel should be low, generally 0.12-0.25%, and there are also appropriate alloy elements to ensure proper hardenability. Nitrided steel also needs to add alloy elements that are easy to form nitrides (such as Al, Cr, Mo, etc.). Carburizing or carbonitriding steel, after carburizing or carbonitriding at 850-950 ºC, is quenched and used in the low temperature tempering (about 200 ºC) state. Nitrided steel is directly used after nitriding treatment (480~580 ºC) and no longer subject to quenching and tempering treatment.

chemical composition

Grade	C	Si	Mn	Cr	Ni	Mo	P	S	Cu
							≤
20Mn2	0.17-0.24	0.17-0.37	1.40-1.80	≤0.30	≤0.30	≤0.10	0.030	0.030	0.30
SMn420	0.17-0.23	0.15-0.35	1.20-1.50	≤0.35	≤0.25		0.030	0.030	0.30
1524	0.19-0.25	0.15-0.30	1.35-1.65	-	-		0.040	0.050	0.20
22Mn6	0.18-0.25	0.10-0.40	1.30-1.65	≤0.40	≤0.40	≤0.10	0.025	0.035	0.30
20SiMn2MoV	0.17-0.23	0.90-1.20	2.20-2.60	≤0.30	≤0.30	0.30-0.40	0.030	0.030	0.30
15Cr	0.12-0.17	0.17-0.37	0.40-0.70	0.70-1.00	≤0.30	≤0.10	0.030	0.030	0.30
15X	0.12-0.18	0.17-0.37	0.40-0.70	0.70-1.00	≤0.30	-	0.035	0.035	0.30
SCr415	0.13-0.18	0.15-0.35	0.60-0.90	0.90-1.20	≤0.25	-	0.030	0.030	0.30
5115	0.13-0.18	0.15-0.35	0.70-0.90	0.70-0.90	-	-	0.040	0.040	-
17Cr3	0.14-0.20	0.15-0.40	0.60-0.90	0.70-1.00	-	-	0.025	0.035	0.40
1.7016	0.14-0.20	≤0.30	0.60-0.90	0.70-1.00		-	0.025	0.025	0.25
20Cr	0.18-0.24	0.17-0.37	0.50-.080	0.70-1.00	≤0.30	≤0.10	0.030	0.030	0.30
20X	0.17-0.23	0.17-0.37	0.50-0.80	0.70-1.00	≤0.30		0.035	0.035	0.30
SCr420	0.18-0.23	0.15-0.35	0.60-0.90	0.90-1.20	≤0.25		0.030	0.030	0.30
5120	0.17-0.22	0.15-0.35	0.70-0.90	0.70-0.90			0.040	0.040	-
20Cr4	0.17-0.23	0.15-0.40	0.60-0.90	0.90-1.20			0.025	0.035	0.40
40Cr	0.37-0.44	0.17-0.37	0.50-0.80	0.80-1.10	≤0.30	≤0.10	0.030	0.030	0.30
40X	0.36-0.44	0.17-0.37	0.50-0.80	0.80-1.10	≤0.30	-	0.035	0.035	0.30
SCr440	0.38-0.43	0.15-0.35	0.60-0.90	0.90-1.20	≤0.25	-	0.030	0.030	0.30
5140	0.38-0.43	0.15-0.35	0.70-1.20	0.70-0.90	-	-	0.040	0.040	-
41Cr4	0.38-0.45	0.10-0.40	0.90-1.20	0.90-1.20	-	-	0.025	0.035	0.40
1.7035	0.38-0.45	-	0.90-1.20	0.90-1.20	-	-	0.025	0.025	0.25
50Cr	0.47-0.54	0.17-0.37	0.50-0.80	0.80-1.10	≤0.30	≤0.10	0.030	0.030	0.30
50X	0.46-0.54	0.17-0.37	0.50-0.80	0.80-1.10	≤0.30	-	0.035	0.035	0.30
5150	0.48-0.53	0.15-0.35	0.70-0.90	0.70-0.90	-	-	0.040	0.040	-
5140	0.38-0.43	0.15-0.35	0.7-0.9	0.7-0.9	≤0.25	≤0.06	≤0.035	≤0.04	≤0.35
1.7335	0.08-0.18	≤0.35	0.4-1	0.7-1.15	-	0.4-0.6	≤0.025	≤0.01	≤0.3

 

Product Description

Category	Grade	Diameter	Standard
High speed steel	6542,M2,M35,M42	1mm-600mm	GB/T3077-1999
Mold steel	Cr12,Cr12MoV,Cr12Mo1V1,D2,SKD11,DC53	1mm-600mm	GB/T3077-1999
Carbon structure steel	Q195, Q215, Q235, Q275	1mm-600mm	GB/T700-2006
Low alloy high strength structure steel	Q295, Q345, Q390, Q420, Q460	1mm-600mm	GB/T1591-2006
Prime Carbon structure steel	10#, 20#, 35#, 45#, 60#, 20Mn, 65Mn, B2, B3, JM20, SH45,S45C, C45	1mm-600mm	GB/T699-1999
Alloy structure steel	30Mn2, 40Mn2, 27SiMn, 42Crmo,20Cr, 40Cr, 20CrMo, 35CrMo, 20CrMnTi, 30CrMnTi,20MnVB, 20MnTiB, 20CrNiMo, Q345B, 35MnBM,40MnB,36Mn2V, 45MnV,	1mm-600mm	GB/T3077-1999
Spring Steel	65Mn, 60Si2Mn, 50CrVA	1mm-600mm	GB/T1222-2002
Bearing Steel	GCr15, GCr15GD,55SiMoV	1mm-600mm	GB/T18254-2002
Structural steels subject to end-quench hardenability requirements	20CrMnTi, 30CrMnTi, 20Cr, 40Cr, 30CrMo, 42CrMoA, 27SiMn, 40Mn2H, 20CrNiMo, 40Mn2, q345b, 35MnBM, 40MnB,45MnV.	1mm-600mm	GB/T5216-2002

Features and applications

Heating surface pipes used for low and medium pressure boilers (the working pressure is generally not greater than 5.88Mpa, and the working temperature is below 450 ºC); It is used for heating surface pipes, economizers, superheaters, reheaters, pipes for petrochemical industry, etc. of high-pressure boilers (the working pressure is generally above 9.8Mpa, and the working temperature is between 450 ºC and 650 ºC).

Mechanical properties

thickness t mm	Heat treatment or condition	tensile strength σb Mpa	Yield point σs Mpa	Elongation δ %	Impact absorbed energy KV2 J
t≤16	Normalizing and tempering (+NT)	450~600	≥300	≥19	* ≥31
16<t≤60	Normalizing and tempering (+NT)	450~600	≥290	≥19	≥31
60<t≤100	Normalizing and tempering (+NT)	440~590	≥270	≥19	≥27
100<t≤150	Normalized and tempered (+NT) or quenched and tempered (+QT)	430~580	≥255	≥19	≥27
150<t≤250	Quenching and tempering (+QT)	420~570	≥245	≥19	≥27

Packaging	1. by bundles, each bundle weight under 3 tons, for small outer diameter steel bars, each bundle with 4 - 8 steel strips. 2. after making by bundle, covered with Polyethylene waterproof cloth. 3. make black paints painting on each bar, then make bundles
20 feet container contains dimension	Length under 6000mm
40 feet container contains dimension	Length under 12000mm
By bulk vessel	Freight charge is low by bulk cargo, and large heavy sizes can not be loaded into containers can shipping by bulk cargo

FAQ

1. Who are we?
Our headquarter is located in Shandong, China. Since 2022, we have sold to North America (60.00%), Western Europe (14.00%) and South America (6.00%). There are about 11-50 people in our office.

2. How do we guarantee quality?
Always provide pre-production samples before mass production;
Always carry out final inspection before shipment;

3. What can you buy from us?
Copper, aluminum, die steel, titanium, customized machine parts
4. Why should you buy from us instead of other suppliers?
The company has 25 years of production experience. It has advanced precision production equipment, modern large warehouse, 200000 tons of inventory goods and a number of long-term stable cooperative customers.

5. What services can we provide?
Accepted delivery conditions: FOB, CFR, CIF, EXW
Accepted payment currency: US dollar, Euro, Japanese yen, Canadian dollar, Australian dollar, Hong Kong dollar, British pound, RMB, Swiss franc;
Accepted payment type: T/T, L/C, D/P D/A, PayPal;
Optional ports: Tianjin, Shanghai, Guangzhou;
Spoken: English, Chinese

6. How can we get your price?
A. We need the following information to quote for you:
1).  Product Name
2).  standard
3).  Material grade (chemical composition)
4).  dimension
5).  amount
6).  Special part drawin