A105 Semi finished flange,A105 Forged semi finished flanges,Forged flange blanks
What is the Semi finished flanges?
Semi Finished Flanges for manufacturers – these flanges are finished with forged process,also called semi finished flange,forged blanks, without machining,drilling and serration, dimension are as per the ASMR B16.5 standard with extra tolerance for further machining. Enables the Flange manufacturer to make final machining at his own workshop, also assures a faster delivery.
We have develeoped a unique production process for flange forged blanks
We keep stock for Semi finished flanges from 1″ to 6″ for both ASME B16.5 and EN 1092-1 flages
Common Types of Semi-Finished Flanges:
- Rough Machined Flanges – The outer and inner diameters are partially machined but require final finishing.
- Blank Flanges – Supplied without drilled bolt holes, allowing for custom hole drilling.
- Faced but Unbored Flanges – The sealing face is finished, but the bore remains unmachined for later adjustment.
- Forged Semi-Finished Flanges – Provided as forged pieces that require machining to the final dimensions.
Advantages of Semi-Finished Flanges:
- Easy Customization based on specific project requirements.
- Cost-effective for manufacturers who need precise tolerances.
ASTM A105 and ASME SA105 covers seamless forged carbon steel piping components for use in pressure systems at ambient and high-temperature service.
Flanges, fittings, valves and various other parts ordered to customer dimension or to industry standards such as MSS, ASME and API specification are included in the scope.
ASTM A105 Chemical Composition
| Element | Composition, % |
|---|---|
| Carbon | 0.35 max |
| Manganese | 0.60 – 1.05 |
| Phosphorus | 0.035 max |
| Sulfur | 0.040 max |
| Silicon | 0.10 – 0.35 |
| Copper | 0.40 max [Note B] |
| Nickel | 0.40 max [Note B] |
| Chromium | 0.30 max [Note B, C] |
| Molybdenum | 0.12 max [Note B, C] |
| Vanadium | 0.08 max |
Notes
A : For each reduction of 0.01 % below the specified carbon maximum (0.35 %), an increase of 0.06 % manganese above the specified maximum (1.05 %) will be permitted up to a maximum of 1.65 %. B : The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00 %.
C : The sum of chromium and molybdenum shall not exceed 0.32 %.
ASTM A105 Mechanical Properties
| Property | Value | |
|---|---|---|
| Tensile Strength, min, ksi | 70.00 | |
| Yield Strength, min, ksi [Note A] | 36.00 | |
| Elongation in 2 inch. | Round Specimen | 22.00 |
| Strip Specimen 5/16″ and Over | 30.00 | |
| Strip Specimen, Smaller sizes | See next table | |
| Reduction of Area, min, % [Note B] | 30.00 | |
| Hardness, HWB, max | 187 | |
Notes :
A : Determined by either the 0.2 % offset method or the 0.5 % extension-under-load method.
B : For round specimen only.
A105 Flanges Heat Treatment requirement
Heat treatment is not a mandatory requirement except for flanges above Class 300, flanges of special design where the design pressure or design temperature are not known and for items over 4” NPS and above Class 300. When heat treatment is required, annealing, normalizing, normalize and temper, normalize and quench and tempering shall be the applied methods.
Our Semi finished flanges stock size
D-SO-PN10 ~40-DN25 (A/B) -RF
D-WN-PN10 ~ 40-DN25 (A/B) -RF
D-WN-PN10 ~ 40-DN20 (A/B) -RF
D-SO-PN16 ~40-DN20 (A/B) -RF
D-PL-PN10 ~40-DN25 (A/B) -RF
D-WN-Class150-DN25-RF-Sch.40
D-SW-Class150-DN25-RF
D-SO-Class150-DN25-RF
D-SW-Class150-DN20-RF
D-SO-Class150-DN20-RF
D-WN-PN10/16-DN50 (AB) -RF
D-WN-PN25/40-DN50 (AB) -RF
D-WN-Class150-2″(SI/BS)-RF-Sch.40
D-WN-Class150-2″(SI)-RF-Sch.80
D-WN-Class300-2″(SI/BS)-RF-Sch.80
D-PL-PN10/16-DN50(A/B)-RF
D-PL-PN25-DN50 (A/B) -RF
D-WN-Class150-DN40-RF-Sch.80
D-WN-PN10~16-DN80 (AB) -RF
D-WN-Class150-DN100-RF-Sch.40
Are you looking for semi-finished flanges From China?
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