Welcome to Xinghan Group Co., Ltd.
20Cr hot rolled steel round bars
Classification :
Product
Product introduction
GB 20Cr alloy Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 28-34 HRc. GB 20Cr steel Annealing delivery hardenss less than 250HB.20Cr With a lower carbon content range, So GB 20Cr alloy steel have good weldability.
GB 20Cr alloy steel equivalent specification: ASTM A29/A29M, DIN EN 10083/3, JIS G4053 and GB/T 3077. GB 20Cr equivalent steel round bar and flat bars can be cut to your required sizes. China steel 20Cr hot rolled and forged steel bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. GB 20Cr steel equivalent material bars are supplied in round, square and flat shapes.
GB 20Cr alloy Steel is a high quality Quenched and Tempered Alloy Structural steel. It belongs to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered GB 20Cr Steel Hardness is 28-34 HRc. GB 20Cr steel Annealing delivery hardenss less than 250HB. With a lower carbon content range, GB 20Cr alloy steel equivalents have good weldability.
GB 20Cr forged steel bar and hot rolled steel bar is widely used for a variety of applications in the used in the automotive and engineering industries for toolholders and other such components. Mostly used in the manufacture of the demand is higher, intensity of heart surface wear, under section under 30 mm or small carburized parts of complex shape and load (oil quenching), such as: transmission gear, gear shaft, CAM, worm, piston pin, claw clutch, etc
Compared with 15Cr steel, it has higher strength and hardenability. The critical hardening diameter in oil reaches 4-22mm, and the critical hardening diameter in water reaches 11-40mm, but its toughness is poor. There is a tendency for grains to grow, and direct quenching at cooling has a greater impact on impact toughness. Therefore, after carburizing, secondary quenching is required to improve the toughness of the part core without temper brittleness; steel has high cold strain plasticity and can be drawn in cold conditions. ; Machinability is good under high temperature normalizing or quenching and tempering state, but poor after annealing; 20Cr is pearlite, with good weldability, generally does not need heat treatment after welding, but parts with a thickness greater than 15mm need to be preheated before welding When it reaches 100～150℃, tempering heat treatment is not required after welding.
Product parameters
Technical data
20Cr hot rolled steel sheet Chemical Composition
| Chemical Composition (%) | ||||||||
| Steel Grade | C | Si | Mn | P | S | Cr | Ni | Cu |
| 20Cr | 0.18～0.24 | 0.17～0.37 | 0.50～0.80 | ≤0.035 | ≤0.035 | 0.70～1.00 | ≤0.030 | ≤0.30 |
Mechanical properties
| Yield strength σs/MPa (>=) | Tensile strength σb/MPa (>=) | Elongation δ5/% (>=) |
Reduction of area ψ/% (>=) |
Impact absorbing energy Aku2/J (>=) | Hardness HBS 100/3000 max |
| ≧540 | ≧835 | ≧10 | ≧40 | ≧47 | ≦179 |
Equivalent Of 20Cr alloy Structure Steel
| USA | Germany | China | Japan | France | England | Italy | Poland | ISO | Austria | Sweden | Spain |
| ASTM/AISI/UNS/SAE | DIN,WNr | GB | JIS | AFNOR | BS | UNI | PN | ISO | ONORM | SS | UNE |
| 5120 / G51200 | 20Cr4 / 1.7027 | 20Cr | SCr420 | 18C3 | 527A20 | 20Cr4 |
Heat treatment Related
- Annealing of 20Cr Alloy structural steel
Slowly heated to 850 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. The 20Cr alloy steel will get MAX 250 HB （Brinell hardness）.
- Hardening of GB Alloy structural steel 20Cr
First quenching heated slowly to 880°C, Then after adequate soaking at this temperature quench in oil or water. Temper as soon as tools reach room temperature. Second quenching heat to 780-820°C， then quenching in oil or water.
- Tempering of 20Cr Alloy structural steel
Heat to 20°C, then cool in water or oil.normal delivery hardness 179HB Min.
Applications
GB 20Cr steel is widely used for a variety of applications in the used in the automotive and engineering industries for toolholders and other such components. Mostly used in the manufacture of the demand is higher, intensity of heart surface wear, under section under 30 mm or small carburized parts of complex shape and load (oil quenching), such as: transmission gear, gear shaft, CAM, worm, piston pin, claw clutch, etc.; For the heat treatment deformation and high abrasion resistance parts, should be high frequency surface quenching after carburizing, such as modulus is less than 3 of the gear, shaft, spline shaft, etc. This steel can be used in the quenched and tempered state and used in the manufacture of large and medium under impact load in her work parts, this kind of steel also can be used as a low carbon martensite steel quenching, further increasing steel yield strength and tensile strength increased (about 1.5 ~ 1.7 times). Typical applications such as valve bodies, pumps and fittings, Shaft, the high load of wheel, bolts, double-headed bolts, gears, etc
Regular size and Tolerance
Steel round bar: Diameter Ø 5mm – 3000mm
Steel plate: Thickness 5mm – 3000mm x Width 100mm – 3500mm
Steel Hexagonal bar: Hex 5mm – 105mm
Others 20Cr have not specified size, pls contact our experienced sales team.
Processing
GB 20Cr alloy steel round bar and flat sections can be cut to your required sizes. 20Cr alloy steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. GB 20Cr steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.
Storage video
Warehouse storage
The group company and factory cover an area of more than 800 mu, with more than 1,500 employees, and its business covers more than 20 countries and regions around the world. Xinghan Group is committed to developing new types of steel products and building a first-class coated sheet and steel manufacturing enterprise with international competitiveness. Xinghan Group hopes to grow into a widely respected and sustainable global resource-based enterprise through continuous pursuit of excellence, create better social, economic and environmental benefits, and bring more competitive value returns to employees and customers.
Packing and delivery
The company has major production lines such as pickling, cold rolling, hot dip galvanizing, hot dip galvanizing, thick plate galvanizing and color coating, forming an annual production capacity of 1 million tons of pickling coil, 1 million tons of cold rolled sheet and 900,000 tons of hot dip galvanized sheet. Galvanized and hot-dip galvanized aluminum zinc silicon steel sheet scale 450,000 tons thick galvanized steel plate scale 300,000 tons color coated steel plate scale is one of the largest steel and non-ferrous metal smelting and processing suppliers in Shandong Province.
Customer visit
The company adheres to the development strategy of "seeking development by science and technology, seeking efficiency by management", adheres to the core values of "people-oriented, integrity, responsibility and excellence", adheres to the development system of "green products and green industry", "promotes high-quality beyond development in an all-round way", and realizes the vision of "building a first-class aluminum processing service enterprise with international competitiveness".
Application field
The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision machining, auto parts, machinery, electronic products, molds, medical treatment Equipment, construction, decoration, etc.
COOPERATIVE PARTNER
FAQ
Q:How long is your delivery time?
A:Within 5 days for stock size, 15-30 days for customized size.
Q:How can I get an accurate quote?
A:Please provide the information of prodcuts standard, material, size and quantity.
Q:When can I get your reply after the inquiry.
A:Within 15 minutes during working time, whthin 12 hours during non-working time.
Q:What product information do I need to provide?
A:You need to provide the grade, width, thickness,coating and the number of tons you need to purchase.
Q:Can you provide sample ?
A: We can provide the samll samples in stock for free, as long as you contact us. Customized samples will take about 5-7days.
Q:How many coutries you already exported ?
A: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan,India, etc.
Q: Can we visit your factory?
A: Sure, we welcome you to visit our factory , check our production lines and know more about our strength and quality.
Q:Can you send samples?
A:Of course, we can send samples to all parts of the world, our samples are free, but customers need to bear the courier costs.
RELATED PRODUCTS
GET A FREE QUOTE
CONTACT US
Tel : +8615562508601
Email : cnxh001@xhsteelgroup.com
WhatsApp：+8615562508601
Address : 166 Xingfu Town, Boxing County, Binzhou City, Shandong Province, China
GET A FREE QUOTE