TECHNICAL SERVICES & SPECIFICATIONS

Facilities now available within the foundry have been bolstered by additional CAD and solidification modelling software. Vanguard Foundry can now receive CAD data from engineers, model the founding characteristics and agree necessary modifications to designs before customers waste time and money on equipment only to find modifications are required at a later date.

This facility will enable customers to get product to market faster and with confidence of a right first time approach.

Simulation of a mould filling with iron.

Compacted Graphite Irons

Compacted Graphite Iron (CGI) or Vermicular Graphite Irons utilise a modified form of the graphite nodules to produce a material which allows higher tensile strength than grey iron but retains the ability to dissipate heat and damp vibration.

Vermicular Irons
  chemical analysis mechanical analysis
C Si Mn P S Mo Ni Ti Mg Fe

tensile
strength
N/mm²
minimum

0.2% proof
stress
N/mm²
minimum
elongation
%
hardness
HBW 10/3000
GJV-SiMo4.1 3 to 3.6 4.3 to 4.7 max 0.3 max 0.05 max 0.02 0.5 to 0.7 max 0.6 max 0.2 (0.05*) balance min 520 min 450 min 2 200 to 250
GJV-SiMoNi5-1-1 2.8 to 3.4 4.6 to 5.0 max 0.3 max 0.07 max 0.02 0.6 to 0.08 0.5 to 0.7 max 0.2 (0.05*) balance min 520 min 420 min 1 210 to 260

* may deviate if microstructure is according to standard


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Special Cast Irons

Special cast irons covers a multitude of materials but high silicon-molybdenum and austempered ductile irons are two in regular production at Vanguard Foundry Ltd. High silicon-molybdenum irons were developed to meet the increasing demand for high strength ductile irons capable of operating at high temperatures. This material ideally suited applications such as manifolds and turbocharger housings where strength, oxidation resistance, structural stability and resistance to thermal cycling are key to performance. Austempered ductile iron was developed to provide a cost effective material with high strength but more importantly excellent wear resistance. The combination of strength and resistance to abrasion whilst retaining some ductility make it an ideal material for agriculture, construction, mining, gears, and many other diverse applications.

High Silicon Molybdenum Irons
  chemical analysis mechanical analysis
Vanguard
designation
C
%

Si
%

Mn
%
S
%
Mo
%
Mg
%

tensile
strength
N/mm²
minimum

0.2% proof
stress
N/mm²
minimum
elongation
%
0.5 to 0.7 SiMo 3 to 3.4 3.8 to 4.2 0.4 max 0.15 max 0.5 to 0.7 0.03 to 0.08 460 310 8
0.7 to 1.25 SiMo 3.2 to 3.8 4.0 to 5.0 0.4 max 0.15 max 0.7 to 1.25 0.03 to 0.08 550 480 5

notes:
1) The above internal specifications were created to accommodate the slight variations in customer to customer requirements.
On the very infrequent occasions that the customer's specification falls outside this range Vanguard's versatility means that most variations can be produced.
2) Typically these materials will be subject to a ferritising heat-treatment (anneal).


BS EN 1564: 1997 Austempered Ductile Iron (ADI)
material designation tensile strength
N/mm²
minimum
0.2% proof stress
N/mm²
minimum
elongation
%
Brinell hardness
HB
symbol number        
EN-GJS-800-8 EN-JS-1100 800 500 8 260 to 320
EN-GJS-1000-5 EN-JS-1110 1000 700 5 300 to 360
EN-GJS-1200-2 EN-JS-1120 1200 850 2 340 to 440
EN-GJS-1400-1 EN-JS-1130 1400 1100 1 380 to 480


ASTM 897M-03 Austempered Ductile Iron (ADI)
grade tensile strength
N/mm²
minimum
0.2% proof stress
N/mm²
minimum
elongation
%
Brinell hardness
HB
1 900 650 9 269 to 341
2 1050 750 7 302 to 375
3 1200 850 4 341 to 444
4 1400 1100 2 388 to 477
5 1600 1300 1 402 to 512

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Material Specifications

Many custormers ask for castings to be produced to their own material specification and Vanguard has the flexibility to cope with this demand.
For other customers Vanguard produce castings that meet international standards.
The specification for ductile iron to EN 1563 1997 is shown below with equivalent international standards shown in a separate table.

EN 1563 Ductile Iron Specifications
Mechanical properties as measured on separately cast test bars.
material designation tensile strength
N/mm²
0.2% proof stress
N/mm²
elongation
%
symbol number
EN-GJS 350-22 EN JS1010 350 220 22
EN-GJS 350-22LT EN JS1015 350 220 22
EN-GJS 400-18 EN JS1020 400 250 18
EN-GJS 400-18LT EN JS1025 400 240 18
EN-GJS 400-15 EN JS1030 400 250 15
EN-GJS 450-10 EN JS1040 450 310 10
EN-GJS 500-7 EN JS1050 500 320 7
EN-GJS 600-3 EN JS1060 600 370 3
EN-GJS 700-2 EN JS1070 700 420 2
EN-GJS 800-2 EN JS1080 800 480 2
EN-GJS 900-2 EN JS1090 900 600 2

notes:
LT = low temperature
1 N/mm² = 1 Mpa

 

International Specifications Equivalent to EN 1563:1997
Mechanical properties as measured on separately cast test bars.
material designation EN 1563 UK
BS 2789
1985
Germany
DIN 1693
1973
Netherlands
NEN 6002-D
1966
Italy
UNI 4544
1979
Sweden
SS 1407
1981
USA
ASTM A536
1993
international
ISO 1083
1987
symbol number
EN-GJS 350-22 EN JS1010 350-22           350-22
EN-GJS 350-22LT EN JS1015 350-22L40 GGG 35.3 GN 38 GS 370-17 17-15   350-22L
EN-GJS 400-18 EN JS1020 400-18   GN 42     60-40-18 400-18
EN-GJS 400-18LT EN JS1025 100-18L20 GGG 40.3     17-02   400-18L
EN-GJS 400-15 EN JS1030 420-12 GGG 40   GS 400-12 17-00 65-45-12 400-15
EN-GJS 450-10 EN JS1040 450-10         70-50-05 450-10
EN-GJS 500-7 EN JS1050 500-7 GGG 50 GN50 GS 500-7 27-02 80-55-06 500-7
EN-GJS 600-3 EN JS1060 600-3 GGG 60 GN60 GS 600-3 32-03 100-70-03 600-3
EN-GJS 700-2 EN JS1070 700-2 GGG 70 GN70 GS 700-2 37-01   700-2
EN-GJS 800-2 EN JS1080 800-2 GGG 80 GN80 GS 800-2   120-90-02 800-2
EN-GJS 900-2 EN JS1090 900-2           900-2


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Material Specifications for Austenitic Cast Irons

Austenitic irons have greater resistance to heat and corrosion when compared to standard grades. Other properties include thermal expansion, magnetic permeability, impact value at low temperatures and erosion resistance will vary with the grade of austenitic iron. Vanguard foundry has both the expertise and the experience to successfully produce these technically demanding materials.

BS 3468 1986 Austenitic Iron Specifications
Chemical and mechanical properties.
type grade C
(max)
%
Si
%
Mn
%
Ni
%
Cu
%
Cr
%
Nb
%
P
(max)
%
Mg
%
tensile
strength
N/mm²
minimum
0.2%
proof
stress
N/mm²
minimum
elongation
%
Charpy
impact
strength
(min)
J@20±5°C
spheroidal
graphite
S2 3.0 1.5 to 2.8 0.5 to 1.5 18.0 to 22.0 0.5 max 1.5 to 2.5   0.8   370 210 7  
S2W 3.0 1.5 to 2.2 0.5 to 1.5 18.0 to 22.0 0.5 max 1.5 to 2.5 0.2 to 1.2 0.8 0.06 max 370 210 7  
S2B 3.0 1.5 to 2.8 0.5 to 1.5 18.0 to 22.0 0.5 max 2.5 to 3.5   0.8   370 210 7 4
S2C 3.0 1.5 to 2.8 0.5 to 2.5 21.0 to 24.0 0.5 max 0.5 max   0.8   370 170 20 20
S2M 3.0 1.5 to 2.5 4.0 to 4.5 21.0 to 24.0 0.5 max 0.2 max   0.8   420 200 25 15
S3 2.5 1.5 to 2.8 0.5 to 1.5 28.0 to 32.0 0.5 max 2.5 to 3.5   0.8   370 210 7  
S5S 2.2 4.8 to 5.4 1.0 max 34.0 to 36.0 0.5 max 1.5 to 2.5   0.8   370 210 7  
S6 3.0 1.5 to 2.8 6.0 to 7.0 12.0 to 14.0 0.5 max 0.2 max   0.8   390 200 15  
notes:
1 N/mm² = 1 Mpa
Flake graphite specifications are shown for interest only. Vanguard Foundry only produce the spheroidal graphite grades.


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Vanguard Stainless Steel Grades

Vanguard Stainless Steel Chemical Specification
  C Cr
Ni Si Mn Co Nb W Mo Cu V P S
CrNiSiNb 22-10 0.3-0.5 21-23 9.5-10.5 1-2.5 2 max 1 max 0.5-0.7 0.6 max 0.5 max 0.25 max 0.12 max 0.04 max 0.03 max
  1 0.45 21.5 10 1.5     0.55            
CrNiSiNb 25-13 0.3-0.5 24-27 12-14.0 0.8-1.5 2 max 1 max 0.5-1.7 0.6 max 0.5 max 0.25 max 0.12 max 0.04 max 0.03 max
  2 0.45 25 12.5 1.3     0.55            
CrNiSi 25-20 0.3-0.5 24-27 19-22 1-2.5 2 max 1 max 0 0.6 max 0.5 max 0.25 max 0.12 max 0.04 max 0.03 max
1.4848 3 0.45 25 19.5 1.5                  
NiCrSiNb 38-19 0.3-0.5 18-22 36-39 1-2.5 2 max 1 max 1.5 to 2.5 0.6 max 0.5 max 0.25 max 0.12 max 0.04 max 0.03 max
1.4849 4 0.45 19 36.5 1.5     1.4            

 

Tensile Strengths
  Tensile Strengths Yield Strengths Elongation BHN
CrNiSiNb 22-10 Mpa Mpa %  
  1 470 240 4 170-230
CrNiSiNb 25-13  
  2 460 230 2 150-220
CrNiSi 25-20  
1.4848 3 450 220 8 150-220
NiCrSiNb 38-19  
1.4849 4 450 220 4 150-220

 

Micro Analysis
Essentially austenitic basic matrix with interdendritic complex carbides
Max % carbides 20%, finely distributed
Constant structure over all areas
Sigma phases < 2.5%
Grain size 3 to 6 according to ISO 643


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