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| 1. Carbon & Alloy Steel: | |
| 1) molding process: | Resin sand casting/Precision/Investment/Loss wax/Fast Forming/RP investment casting/Forging |
| 2) Material: | ----EN 10293 GE200/DIN1681 GS38 ----EN 10293 GE240/DIN1681 GS45 ----EN 10293 GE300/DIN1681GS5216Mn,25Mn,34CrMo,42CrMo4… |
| 3) Industry involved: | Twist lock for container locking,Specified container corner casting, non-standard forging draw bar weighted 31kgs,Dia.300 Bolted joints of space grid structure. |
| 4) Part unit weight range: | Resin sand casting from 50kgs up to Chinese loss wax from 0.01 up to 100kgs,Japanese loss wax from 0.001up to 80kgs.Close die Forging up to 30kgs |
| 5) Max/Min wall thickness requirements: | |
| 6) Manufacturer Certification: | ISO9001(2000)/ TS16949 |
| 2. Stainless steel: | |
| 1) molding process: | Precision/Investment/Loss wax/ CentrifugalCasting |
| 2) Material: | CF8, CF8M, CF3, CF3M |
| 3) Industry involved: | Impellers for aero industryCentrifugal tubes with OD670/L=4.5m/W=1.5tons |
| 4) Part unit weight range: | Japanese loss wax from 0.001up to 80kgs.Centrifugal tubes up to 1500kgs |
| 5) Max/Min wall thickness requirements: | |
| 6) Manufacturer Certification: | ISO9001(2000)/ TS16949 |
Tolerance standard:
VDG P690 T1 VDG P690 D1
ISO2768mK
dimension | tolerance |
<6 | ±0.25 |
6to10 | ±0.3 |
10to18 | ±0.35 |
18to30 | ±0.4 |
30to50 | ±0.5 |
50to80 | ±0.75 |
80to120 | ±0.85 |
120to180 | ±1.0 |
180to250 | ±1.2 |
250to315 | ±1.6 |
315to400 | ±1.8 |
400to500 | ±2.0 |
500to630 | ±2.7 |
630to800 | ±3.1 |
800to1000 | ±3.6 |
dimension | tolerance |
<6 | ±0.15 |
6to10 | ±0.18 |
10to18 | ±0.22 |
18to30 | ±0.26 |
30to50 | ±0.4 |
50to80 | ±0.45 |
80to120 | ±0.55 |
120to180 | ±0.8 |
180to250 | ±1.2 |
250to315 | ±1.3 |
315to400 | ±1.8 |
400to500 | ±2.0 |
500to630 | ±2.7 |
630to800 | ±3.1 |
800to1000 | ±3.6 |
The ultimate success of the casting design depends on the communication between the designer and foundry engineers. When the foundry is properly informed of part requirements, there is usually a compromise of specifications that will allow for maximum compliance to print specifications and finish part design.1. Standard Linear Tolerance(mm)As-cast tolerances of angles is mainly a function of the part design and their ocation in casting. They range from +/- 1/2 degree (considered minimum) for well supported positions to +/- 2 degree where existing distortion could be expected. Inclusion of gussets and ribs normally minimizes distortion and many sections can be mechanically straightened.2. Flatness, Strengteness and Roundness
| Section Thickness | Possible Thickness Section Sink per Face of Casting | |
Normal | Premium | |
Up to 25 | 0.20 | 0.10 |
25 to 50 | 0.40 | 0.20 |
50 to 100 | 0.60 | 0.30 |
100 to 150 | 0.80 | 0.40 |
Straightening adds cost, but sometimes cannot be avoided. The actual straightening costs are often dependent on the tightness of the tolerance specified, so do not specify tighter flatness, straightness, roundness, or other requirements than you actually require. (WOTECH typically straightens parts using die sets that will be included in your tooling price.)3. Size and Weight Range Size and Weight. Part size and weight are the most critical factors in determining part cost because mold capacity is limited by both size and weight. The more pieces that can run on a mold, the lower the part cost. Unnecessary mass should always be removed by correct engineering practices to reduce part weight.
| Items | Size | Premium |
Outline Dimention | 1000×620×380 | up to 100 |
Weight(kgs) | 0.001-60 | 0.10 to 1.50 |
Min. Wall Thickness | 0.50 | 5 to 10 |
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