Quality
The production technology, developed by MAGYARMET, has been approved by TÜV Rheinland acc. to DGR 97/23/EC, and the extensive quality assurance system of the company is certified acc. ISO 9001.
Regarding dimensional tolerances, surface roughness and machining allowance MAGYARMET applies the P 690 guidelines released by the German Association of Casting Industry (BDG) in 2010. The guideline (BDG Reference Sheet P 690: Investment castings – Dimensional tolerances, surface condition, machining allowance) is a Europe-wide recognized standard.
Linear Tolerances
Nominal Dimensions | D1 | D2 | D3 | |||
---|---|---|---|---|---|---|
Field | GTA | Field | GTA | Field | GTA | |
0 - 6 | 0,3 | 14 | 0,24 | 13,5 | 0,2 | 13 |
6 - 10 | 0,36 | 0,28 | 0,22 | |||
10 - 18 | 0,44 | 0,34 | 0,28 | |||
18 - 30 | 0,52 | 0,4 | 0,34 | |||
30 - 50 | 0,8 | 14,5 | 0,62 | 14 | 0,5 | 13,5 |
50 - 80 | 0,9 | 0,74 | 0,6 | |||
80 - 120 | 1,1 | 0,88 | 0,7 | |||
120 - 180 | 1,6 | 15 | 1,3 | 14,5 | 1 | 14 |
180 - 250 | 2,4 | 15,5 | 1,9 | 15 | 1,5 | 14,5 |
250 - 315 | 2,6 | 2,2 | 1,6 | |||
315 - 400 | 3,6 | 16 | 2,8 | 15,5 |
Data for iron-, nickel-, cobalt- and copper-based alloys.
The tolerance band to be applied is as follows:
D1 – generally applies to free dimensions
D2 – applies to functional dimensions
D3 – applies only to very precise functional dimensions to be agreed with the investment foundry
Wall Thickness Tolerances
Smallest Side Length of an Area in mm | Materials of Group D-, Fe-, Ni-, Co-, Cu-based Alloys, Dimensions in mm |
---|---|
< 50 | +/-0,25 |
50 - 100 | +/-0,30 |
100 - 180 | +/-0,40 |
180 - 315 | +/-0,50 |
>315 | +/-0,60 |
Surface Finish
Surface Standards | Materials of Group D | |
---|---|---|
CLA (µinch) | Ra (µm) | |
N 7 1.) | 63 | 1.6 |
N 8 2.) | 125 | 3.2 |
N 9 3.) | 250 | 6.3 |
1.) To be agreed with supplier, achieved by additional treatment.
2.) Surface finish of the component “as cast”. Surface finish negotiated with the supplier.
3.) Standard surface finish for investment castings.
Angular Tolerances
Normal Size 1) | Tolerance Class | |||||
---|---|---|---|---|---|---|
1 | 2 | 3 | ||||
Allowed Directional Deviation | ||||||
Angle-minutes | mm /100mm | Angle-minutes | mm /100mm | Angle-minutes | mm /100mm |
|
< 30 mm | 30 2) | 0.87 | 30 2) | 0.87 | 20 2) | 0.58 |
30 - 100 mm | 30 2) | 0.87 | 20 2) | 0.58 | 15 2) | 0.44 |
100 - 200 mm | 30 2) | 0.87 | 15 2) | 0.44 | 10 2) | 0.29 |
> 200 mm | 20 2) | 0.58 | 15 2) | 0.44 | 10 2) | 0.29 |
1) Related to the length of the shorter leg.
2) Angle may deviate in both directions.