Introduction of Grey Iron in ISO 185
Grey Cast Iron is also known as flake graphite cast iron, and less commonly as lamellar graphite cast iron. castings in ISO 185 are popular gray iron material.
Manufacture Process for Grey Iron in ISO 185
- Sand Casting
- Shell Casting
- Lost Foam Casting
Our Services
- Sand Casting
Casting Quality focus on Metal Parts industry, we provide professional service in Metal Casting field.
Sand Casting is a popular metal form method, are suitable for all materiel, such as grey iron, ductile iron, malleable iron, carbon steel, stainless steel, aluminum and bronze.
- Investment Casting
Also named as precision lost wax casting, mainly suitalbe for carbon steel and stainless steel parts. We also provide grey iron and ductile iron and aluminum and bronze parts by investment casting. It can achieve the best appearance with good tolerance
- Shell Casting
Shell casting method is a good option to replace investment casting and sand casting. the quality is better than sand casting parts, suitable for bulk production.
- Permanent Mold Casting
For aluminum parts and Brozne parts
- CNC Machining
CNC Milling, CNC turning with 5 xix CNC center, we provide precision machining for all castings based on customers design drawings.
- CAD Design
Mechanical Design service based on customers requirement, our software is Solidworks and AutoCAD.
- Tools/Mold Design
Mould design and production will be served for metal casting ad plastic injection industry. Based on our more than 10 years experience, we supply professional molds for our customers in Europe and North American.
PDF VIEWStandard of Grey Iron
ISO 185: 2005 Grey Cast Irons – Classification (grey cast iron)
Grey Iron in ISO 185 Equivalent Material Grades
| ISO 185:2004 | ISO 185:1988 | EN 1561 | ASTM A48 | JIS G5501 | SAE J431 | GB/T 9439:2010 |
| ISO 185/JL/150 | 150 | EN-GJL-150 | 150 | FC150 | G9H12 | HT150 |
| ISO 185/JL/200 | 200 | EN-GJL-200 | 200 | FC200 | G10H18 | HT200 |
| ISO 185/JL/225 | – | – | 225 | – | G10/21/G11H18 | HT225 |
| ISO 185/JL/250 | 250 | EN-GJL-250 | 250 | FC250 | G11H20 | HT250 |
| ISO 185/JL/275 | – | – | 275 | – | G12H21/G13H19 | HT275 |
| ISO 185/JL/300 | 300 | EN-GJL-300 | 300 | FC300 | G13H22 | HT300 |
| ISO 185/JL/350 | 350 | EN-GJL-350 | 350 | FC350 | G13H24 | HT350 |
| ISO 185/JL/HBW155 | H145 | EN-GJL-HB155 | – | – | H10 | H155 |
| ISO 185/JL/HBW175 | H175 | EN-GJL-HB175 | – | – | H11 | H175 |
| ISO 185/JL/HBW195 | H175/H195 | EN-GJL-HB195 | – | – | H13/H14 | H195 |
| ISO 185/JL/HBW215 | H175/195/215 | EN-GJL-HB215 | – | – | H15 | H215 |
| ISO 185/JL/HBW235 | H195/215/235 | EN-GJL-HB235 | – | – | H18 | H235 |
| ISO 185/JL/HBW255 | H215/235/255 | EN-GJL-HB255 | – | – | H20 | H255 |
Grey Iron in ISO 185 Material Property
Density:
- ISO 185/JL/150 – 7.1kgs/dm3;
- ISO 185/JL/200 and ISO 185/JL/225 – 7.15kgs/dm3;
- ISO 185/JL/250 and ISO 185/JL/275 – 7.2kgs/dm3;
- ISO 185/JL/300 and ISO 185/JL/350 – 7.25kgs/dm3;
Grey Iron in ISO 185 Chemical Composition Requirements
The chemical composition shall be left to the discretion of the manufacture , shall ensure that the requirements of ISO 185 standard are met for the material grade . No any standard mentioned the chemistry composition, so we only suggest the following chemistry based on our experience.
| Grade | Wall Thickness (mm) | C | Si | Mn | P ≤ | S ≤ |
| ISO 185/JL/100 | – | 3.4~3.9 | 2.1~2.6 | 0.5~0.8 | 0.3 | 0.15 |
| ISO 185/JL/200 | <30 30~50 >50 | 3.3~3.5 3.2~3.5 3.2~3.5 | 2.0~2.4 1.9~2.3 1.8~2.2 | 0.5~0.8 0.5~0.8 0.6~0.9 | 0.2 0.2 0.2 | 0.12 0.12 0.12 |
| ISO 185/JL/250 | <30 30~50 >50 | 3.2~3.5 3.1~3.4 3.0~3.3 | 1.6~2.0 1.5~1.8 1.4~1.6 | 1.7~0.9 0.8~1.0 0.8~1.0 | 0.15 0.15 0.15 | 0.12 0.12 0.12 |
| ISO 185/JL/300 | <30 30~50 >50 | 3.0~3.3 2.9~3.2 2.8~3.1 | 1.4~1.7 1.3~1.6 1.2~1.5 | 0.8~1.0 0.9~1.1 1.0~1.2 | 0.15 0.15 0.15 | 0.12 0.12 0.12 |
| ISO 185/JL/350 | <30 30~50 >50 | 2.9~3.2 2.9~3.2 2.8~3.1 | 1.4~1.7 1.2~1.5 1.1~1.4 | 0.8~1.0 0.9~1.1 1.0~1.2 | 0.15 0.15 0.15 | 0.10 0.10 0.10 |
Grey Iron in ISO 185 Mechanical Property
The material can be designated as two methods: a) the tensile strength in separately casting; b) the hardness of material.
| Grade | Wall thickness mm | Mechanical Requirements | |||
| Tensile strength mandatory Value | Tensile Strength anticipated value in castings | ||||
| Symbol | Over | Up to | In separately casting sample (N/mm2) ,min | In cast-on samples (N/mm2) min | Tensile Strength, Rm min, (MPa) |
| ISO 185/JL/100 | 5 | 40 | 100 | – | – |
| ISO 185/JL/200 | 2.5 | 5 | 150 | – | 180 |
| 5 | 10 | – | 155 | ||
| 10 | 20 | – | 130 | ||
| 20 | 40 | 120 | 110 | ||
| 40 | 80 | 110 | 95 | ||
| 80 | 150 | 100 | 80 | ||
| 150 | 300 | 90 | – | ||
| ISO 185/JL/200 | 2.5 | 5 | 200 | – | 230 |
| 5 | 10 | – | 205 | ||
| 10 | 20 | – | 180 | ||
| 20 | 40 | 170 | 155 | ||
| 40 | 80 | 150 | 130 | ||
| 80 | 150 | 140 | 115 | ||
| 150 | 300 | 130 | – | ||
| ISO 185/JL/225 | 5 | 10 | 225 | – | 230 |
| 10 | 20 | – | 205 | ||
| 20 | 40 | 190 | 170 | ||
| 40 | 80 | 170 | 150 | ||
| 80 | 150 | 155 | 135 | ||
| 150 | 300 | 145 | – | ||
| ISO 185/JL/250 | 5 | 10 | 250 | – | 250 |
| 10 | 20 | – | 225 | ||
| 20 | 40 | 210 | 195 | ||
| 40 | 80 | 190 | 170 | ||
| 80 | 150 | 170 | 155 | ||
| 150 | 300 | 160 | – | ||
| ISO 185/JL/275 | 10 | 20 | 275 | – | 250 |
| 20 | 40 | 230 | 220 | ||
| 40 | 80 | 205 | 190 | ||
| 80 | 150 | 190 | 175 | ||
| 150 | 300 | 175 | – | ||
| ISO 185/JL/300 | 10 | 20 | 300 | – | 270 |
| 20 | 40 | 250 | 240 | ||
| 40 | 80 | 220 | 210 | ||
| 80 | 150 | 210 | 195 | ||
| 150 | 300 | 190 | – | ||
| ISO 185/JL/350 | 10 | 20 | 350 | – | 315 |
| 20 | 40 | 290 | 280 | ||
| 40 | 80 | 260 | 250 | ||
| 80 | 150 | 230 | 225 | ||
| 150 | 300 | 210 | – | ||
Brinell hardness of castings of grey cast iron:
| Grade material | Relevant Wall thickness (mm) | Brinell hardness (HBW) | ||||
| Symbol | Over | Up to | Min | Max | ||
| ISO 185/JL/HBW155 | 2.5 | 5 | – | 210 | ||
| 5 | 10 | 185 | ||||
| 10 | 20 | 170 | ||||
| 20 | 40 | 160 | ||||
| 40 | 80 | 150 | ||||
| ISO 185/JL/HBW175 | 2.5 | 5 | 170 | 260 | ||
| 5 | 10 | 140 | 225 | |||
| 10 | 20 | 125 | 205 | |||
| 20 | 40 | 110 | 185 | |||
| 40 | 80 | 100 | 175 | |||
| ISO 185/JL/HBW195 | 4 | 5 | 190 | 275 | ||
| 5 | 10 | 170 | 260 | |||
| 10 | 20 | 150 | 230 | |||
| 20 | 40 | 135 | 210 | |||
| 40 | 80 | 120 | 195 | |||
| ISO 185/JL/HBW215 | 5 | 10 | 200 | 275 | ||
| 10 | 20 | 180 | 255 | |||
| 20 | 40 | 160 | 235 | |||
| 40 | 80 | 145 | 215 | |||
| ISO 185/JL/HBW235 | 10 | 20 | 200 | 275 | ||
| 20 | 40 | 180 | 255 | |||
| 40 | 80 | 165 | 235 | |||
| ISO 185/JL/HBW255 | 20 | 40 | 200 | 275 | ||
| 40 | 80 | 185 | 255 | |||
Grey Iron in ISO 185 Heat Treatment Requirement
Generally, the castings are supplied without heat treatment.
Grey Iron in ISO 185 Application
- Pump and valve
- Machinery bed.
- Machinery parts.
Grey Iron Machinability:
Very good, easy for machining such as milling, turning or drilling.
Grey Iron Weldability:
Very bad. Generally, castings welding require the purchaser’s approval. The welding process and the filler metals should be appropriated to the use of the casting in manner intended.
As a professional manufacturer in China, We Casting Quality focus on Metal Parts OEM industry, and provide solutions and services in Metal Casting field as following:
- Sand Casting
- Investment Casting, Lost Wax process
- Shell Casting
- Lost Form Casting
- CNC Machining
- CAD Design
- Tools/Mold Design
Material Supplied
- Cast Iron Castings (Grey Iron, Malleable Iron, Ductile Iron)
- Carbon Steel and Alloy Steel Castings
- Stainless Steel and Duplex Stainless Steel Castings
- Aluminum Castings
- Bronze and Brass Castings
- Titanium and Cobalt Alloy Castings
What We Can Do
- Design Ability
Our engineers will help you to improve the designs based on casting technology, then The simulation software will be processed to verify the casting pouring system. Pro/E, Solidworks, AutoCAD and ProCast are available in Casting Quality Industrial.
- Saving Cost
Some manufacture processes may lead high cost. We will analyse the designs and advise the suitable methods to our customers. The best solution will be adopted.
- Quality Control
From the raw material selecting to bulk production processing, all procedures will follow PPAP program if necessary. The certificates will be provided including chemistry, hardness, mechanical property or NDT testing.
- Production Capacity
The max iron/steel castings can reach 30tons in weight, meanwhile the minus casting is around 1gram only.
We also have prototyping and 3D scanning ability for sample plan.
- Logistic Service
The products will be delivered directly to customer’s workshop, which will save plenty of work for clients.