M12 Stainless Steel Machining Parts Simple Ball Head Bolt For
Conversion Valve
Simple design with practicable purpose for conversation valve
machined part, it has a big bal head for convenient operation by
hand , there is threaded section length on the end length so that
to be screwed into threaded hole and fixed , and in the middle of
length is a shaft with bevel angle , the upper diameter is smaller
than the bottom diameter , this design makes operation is more
smooth .
Material for conversation valve machined part
Conversation valve machined part is made of stainless steel 303
with polished surface .
Chemical elements for conversation valve machined part
| C | Si | Mn | S | P | Mo | Cr | Ni |
| 0.15 | 1 | 2 | 0.15 | 0.2 | 0.6 | 18 | 9 |
Physical performance for conversation valve machined part
| Fusing point(℃) | 1290~1368 |
| specific heat capacity(0~100C,KJ·kg-1K-1) | 0.5 |
| Heat conductivity(W·m-1·K-1) | (100℃)15.5 |
| Resistivity(20,10-6Ω·m) | 0.73 |
Mechanical property for conversation valve machined part
| Tensile strength σb (MPa) | 550 |
| Yield Strength σs (MPa) | 210 |
| Elongation δ5 (%) | 50 |
| Reduction of area ψ (%) | 55 |
| Density g/cm3) | 7.98 |
Finish for conversation valve machined part
| Polishing | Grey | 0.01mm ( reference ) | Improving brightness of surface |
Dimensions for conversation valve machined part
| Ball diameter | 25 |
| Threaded section length | 20 |
| Threaded section diameter | M12 |
| Middle shaft length | 30 |
| Middle shaft diameter | 20mm and 10mm |
| Tolerance | +/-0.1 |
Unmarked tolerances for conversation valve machined part
Linear tolerances
| Level | 0.5-0.3 | 3-6 | 6-30 | 30-120 | 120-400 | 400-1000 | 1000-2000 | 2000-40000 |
| f | ±0.05 | ±0.05 | ±0.1 | ±0.15 | ±0.2 | ±0.3 | ±0.5 | - |
| m | ±0.1 | ±0.1 | ±0.2 | ±0.3 | ±0.5 | ±0.8 | ±1.2 | ±2 |
| c | ±0.2 | ±0.3 | ±0.5 | ±0.8 | ±1.2 | ±2 | ±3 | ±4 |
| v | - | ±0.5 | ±1 | ±1.5 | ±2.5 | ±4 | ±6 | ±8 |
Angle tolerances
| Level | 0-10 | 10-50 | 50-120 | 120-400 | Above 400 |
| f | ±1° | ±0°30' | ±0°20' | ±0°10' | ±5° |
| m | ±1° | ±0°30' | ±0°20' | ±0°10' | ±5° |
| c | ±1°30' | ±1° | ±0°30' | ±0°15' | ±0°10' |
| v | ±3° | ±2° | ±1° | ±0°30' | ±0°20' |
Features for conversation valve machined part
※ Bright surface
※ High Precision
※ Perfect fineness
※ No Burrs
※ Good corrosion resistance
※ Environmentally-friendly
※ Super materials
※ Strict dimensions
Other optional materials for conversation valve machined part
● Stainless steel
SUS430 ,SUS304 ,SUS316
● Alloy steel
GCr15,GCr15SiMn ,20Cr,20CrMnTi
● Titanium
TA1 ,TA2 , TA4 , T40 ,Ti1 , Ti2 ,Ti4
