Forged Flat Bar 18CrNiMo7-6 High Performance Alloy Steel Gear Steel

18CrNiMo7-6 is a case hardening steel with high toughness. There are a number of variants with high cleanliness requirements. All variants possess tighter composition ranges compared to the standard. One variant is produced with the quality class IQ (isotropic quality). This ensures a very low number of elongated sulphide inclusions which will give more isotropic properties. The high oxidic cleanliness will enable the steel to meet the same high cleanliness demands as for re-melted qualities.

Forged Flat bar 18CrNiMo7-6 Product features

Forged Flat bar 18CrNiMo7-6 Chemical Compostion

Forged Flat bar 18CrNiMo7-6 Mechanical properties

• 18CrNiMo7-6 has many grade, with different heat treatment process, different grade will have different performance on mechanical properties.
• Grade 159A - Variant with low sulphur content and high cleanliness demands
• Grade 159B - Variant with controlled sulphur content for consistent machinability and +H hardenability
• Grade 159Q - Isotropic properties (IQ) and better fatigue strength due to higher cleanliness levels, and a finer size and distribution of non-metallic inclusions
• Grade 159X - Variant with controlled sulphur content for consistent machinability and +H hardenability
• Grade 159S - Variant with increased sulphur content.
• Grade 4761(MoCN216) - Low sulphur variant of Imatra

Forged Flat bar 18CrNiMo7-6 Equivalent grades

Forged Flat bar 18CrNiMo7-6 Heat Treatment

• Normalizing:850 – 880°C/air
• Soft annealing:650 – 700°C/furnace
• Stress relieve:630- 650^oC
• Carburising:880 – 980°C
• Core hardening:830 – 870°C/water
• Intermediate annealing:630 – 650°C
• Case hardening:780 – 820°C/water
• Tempering:150 – 200°C

18CrNiMo7-6

Zhangjiagang Guangda Special Material Co.,Ltd was established in 2003.  We located in Jiangsu Province beside Shanghai. Act as the high-tech enterprises with high-quality special alloy materials as the core business belong to the "advanced iron and steel materials" industry under the strategic emerging industries supported by the state.

 1. Headquarter Zhangjiagang 220.000㎡                                   2. Rugao Base 420.000㎡                   

 3. Zhangjiagang Precision Manufacturing Base 200,000㎡     4. Deyang Base 350.000㎡

Guangda Main products.

1. Material :
Gunagda has formed more than 10 core technologies in material melting technology and has internationally advanced heat treatment production lines from smelting and forging. Annual capacity for high quality alloy ingot 500,000 tons .Guangda provide high quality gear steel, high quality die steel, special stainless steel, high temperature alloy, ultra-high strength steel and other new material products encouraged by the state.

2.Forgings:
Guangda provide different forgings of shaft ,gear blank , ring rolling, rough machining, heat treatment and finish machining. Our annual production capacity is 500,000 tons for various of free-die forgings, ring rollings .Guangda forgings are widely used in high-end equipment manufacturing industries such as new energy wind power, rail transit, mechanical equipment, aerospace, new energy power, gas turbine, Marine petrochemical, semiconductor chip equipment and so on.

3.Castings:
Our business mainly focuses on large casting equipment, and our products mainly include large wind turbine castings, large equipment and equipment castings, large plastic machinery castings, and large shell castings with a total annual capacity of 210,000 tons. We have formed a whole industrial chain of smelting, casting, machining and surface treatment, and our technology and cost control are leading in the world.

4.Precision machining parts:
Through continuous and high starting point technical transformation. Guangda has introduced world-class high-precision equipment for the gears manufacturing, established a complete quality management system and after-sales service network, and dedicated itself to providing users with high-quality products. Quality products and satisfactory service.​All products are manufactured with the most advanced and modern equipment of PAMA,Gleason,Danobat,Kehren,Nicolas,Pierto carnaghi and efficient technical team with an emphasis on cost effective production.Guangda pursues excellence & innovation with tight quality control & the most advanced technology in the industry.