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What standard can be used for the rough casting dimensional tolerance for iron, steel and aluminum castings? and how can find a free downloaded DIN 1686 standard?

We recommend the DIN 1686 standard for the rough casting general tolerance. Please see the following table. We believed this standard is widely using by the purchasers and suppliers. It is a good reference for the unspecified casting tolerance.

However, we still think we should not take it as an absolutely inspection standard. For some positions, if they do not need as accurate as this standard requirements, we should enlarge the tolerance. Likewise, for the positions, we should take them more seriously in case of unnecessary trouble caused on your clients. All in all, you should take this standard as a useful reference, not an accurate inspection standard.

DIN 1686 – 1
Length (mm)

  -6 -10 -20 -30 -50 -80 -120 -180
GTB20 - - - ±7.5 ±11 ±12 ±13 ±14
GTB19 - - ±4.5 ±7.5 ±8 ±8.5 ±9 ±10
GTB18 - ±2.5 ±4.5 ±4.7 ±5 ±5.5 ±6.5 -
GTB17 ±1.5 ±2.5 ±2.9 ±3 ±3.2 ±3.4 ±3.7 -
GTB16 ±1.5 ±1.8 ±1.8 ±1.9 ±2 ±2.1 ±2.3 -
GTB15 ±0.95 ±1 ±1.1 ±1.2 ±1.3 ±1.4 - -


Thickness (mm)

  -6 -10 -20 -30 -50 -80 -120 -180
GTB20 - - - ±7.5 ±11 ±12 ±13 ±14
GTB19 - - ±4.5 ±7.5 ±8 ±8.5 ±9 ±10
GTB18 - ±2.5 ±4.5 ±4.7 ±5 ±5.5 ±6.5 -
GTB17 ±1.5 ±2.5 ±2.9 ±3 ±3.2 ±3.4 ±3.7 -
GTB16 ±1.5 ±1.8 ±1.8 ±1.9 ±2 ±2.1 ±2.3 -
GTB15 ±0.95 ±1 ±1.1 ±1.2 ±1.3 ±1.4 - -

Related References:
Casting
Sand Mold Casting Tolerances
Metal Casting Comparison Table
Metal Casting Processes Comparison Table
DIN 1686 - Standard for Rough Casting General Tolerance
BS 6615 ISO 8062 Rough Casting Tolerance
ISO8062 BS6615 Iron Steel Rough Casting Tolerance Standard
ASTM A48 Standard Specification for Gray Iron Castings
ASTM A216 Standard for Steel Casting Suitable for fusion weld
ASTM A278 Standard for Gray Iron Casting for Pressure Parts
Comparison Table of Alloy Steel Casting Degrees
Mechanical Properties of Aluminum Die Casting Alloys
Wrought Aluminum Alloys Properties Casting Alloys Notes
UNS Number J1 | UNS Number J2 | UNS Number J3


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