Xi'an, Shaanxi, China
Member Since: 2018
Business Type: Manufacturer/Factory,Trading Company
Square/Round Bar: 2~ 500mm
Flat/Sheet/Plate/Strip:0.1~600 x 10~ 2000mm
Steelmaking process: EF, EF/EAF+LF+VD, EF/EAF+ESR, hot forged/ hot rolled
Delivery condition: hot rolled, forged, annealed, quenched and tempered ,or as your special requirements.
Surface condition: black surface, polished surface, grinded surface, peeled surface, milled surface.
1. Chemical composition
2. Equivalent Steel Grade
|Standard||ASTM A29||DIN 17200||BS 970||JIS G4105||GB/T 3077||AS 1444|
3. Mechanical Properties
4. Surface Treatment
Plate: Origin Black, Orign cold rolled bright, Machined, Grinded
Bar: Origin Black, Orign cold rolled(drawn) bright, Turned, Peeled, Grinded
Round bar: Diameter(mm) Max 800mm; Length(mm) Max 12000mm.
Plate: Thickness(mm) Max 800mm; Width(mm) Max 2300mm; Length(mm) Max 12000mm.
Condition: Cold rolled(drawn)≤50mm, Hot rolled≤12-250mm, Hot forged≥50mm.(Thickness/Diameter)
6. Heat Treatment
Preheat the steel carefully, then raise the temperature to 1150-1200°C for forging. Do not forge below 850°C.
Heat the AISI 4140 slowly to 800-850°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace to 480°C followed by air cooling.
When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening.
AISI 4140 steel is usually supplied ready heat treated to 18-22HRC. If further heat treatment is required annealed AISI 4140 should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.
Heat the AISI 4140 carefully to a suitable temperature selected by reference to a tempering chart or table (usually between 550-700°C, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air. Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value.
--Annealing capacity: 4800 tons/ month
--Tempering capacity: 3000 tons/Month
Why Choose Us?
Excellent experts and professional production lines
Leading manufacture in China
Special steel Product Technology Solution Provider
Cost control-manufacturing and exporting by ourselves
Competitive price-without middleman
Strict quality control system
On time delivery
RGTECH new materials seek partners from all over the world. Once we become our agents, the price is favorable and the delivery time is given priority.
Now Italy, Taiwan, India, Thailand, the United States, Germany, agent distribution channels have been established.
Local agents can handle after-sales problems very well