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Description
PETROL STEEL CO.,LTD is the professional Production and Export Enterprise of the TZM Molybdenum Piercing Plugs.
In the Seamless Steel Pipe oblique rolling piercing process, the piercing plug/Mandrel Head is the core consumable tool that directly extends into the center of the 1100-1250 ℃ red heat pipe blank, bears axial thrust, circumferential friction, and undergoes rapid cooling and heating cycles at the rate of one second. When the perforation object is austenitic stainless steel, duplex steel, bearing steel or high-temperature alloy pipe, the yield strength of conventional H13 or carbon steel head drops sharply in this temperature zone, which easily leads to nose end upsetting, surface cracking and steel sticking (pick-up), resulting in the inner diameter of the pipe exceeding the tolerance, inner wall spiral scratching and unplanned shutdown for head replacement. The TZM molybdenum alloy piercing plug (per ASTM B386 Type 364) has become the industry standard solution for high-end seamless pipe factories worldwide to deal with difficult to deform material piercing due to its high melting point of 2620 ℃, excellent high-temperature yield strength, and thermal fatigue resistance. PETROL STEEL CO., LTD (PESCO), as a manufacturer and exporter focusing on deep processing of refractory metals and supporting industrial pipes for more than 15 years and maintaining zero quality complaint record, provides global seamless pipe manufacturers with one-stop TZM piercing plug supply services from drawing interpretation, material selection, precision CNC processing to delivery of export documents. The products have been stably applied to steel pipe production lines in Japan, South Korea, Germany, India, Türkiye, Russia and Southeast Asia.
Why do stainless steel and high alloy seamless pipes rely on TZM molybdenum alloy plugs for perforation?
The instantaneous contact temperature between the top and nose during oblique rolling perforation often reaches over 1200 ℃, and is sprayed with cooling water to below 200 ℃ after each perforation - this thermal cycle has extremely strict requirements for the high-temperature strength and ductile brittle transition behavior of the material. TZM alloy (Mo-0.40~0.55% Ti-0.06~0.12% Zr-0.01~0.04% C, with a balance of Mo ≥ 99.3%) achieves precipitation strengthening and grain boundary pinning through TiC and ZrC second phase particles. The recrystallization temperature is increased by 100-150 ℃ compared to pure molybdenum, and the yield strength remains about 30-50% higher than pure molybdenum in the working temperature range of 1000-1200 ℃; Its thermal conductivity is about three times that of 304 stainless steel, which can quickly dissipate the frictional heat from the perforated area and delay the surface temperature rise. Actual production line comparison shows that under the same working conditions, the single perforation length of TZM head is usually 8-15 times that of carbon steel head. The decrease in head replacement frequency means an increase in effective operation rate and a decrease in the amortization cost of unit billet head. This is also the fundamental reason why more and more international EPC and independent seamless pipe factories explicitly require the use of TZM molybdenum head in the stainless steel/high-temperature alloy perforation section in their technical transformation specifications. PESCO not only supplies, but also assists customers in determining whether the current production line has reached the upgrade node during the inquiry stage, avoiding implicit capacity losses caused by incompatible heads.
PESCO Manufacturing Capability: Fully Controlled Process from Isostatic Pressure Powder Metallurgy to Precision Finished Products.
We are well aware that the lifespan of the top not only depends on the grade, but also on the uniformity of density and the geometric accuracy of machining. The PESCO TZM perforation head is made of high-purity molybdenum powder with a precise ratio of TiH ₂/ZrH ₂/graphite additives. It undergoes three-dimensional mixing, cold isostatic pressing (CIP), high-temperature hydrogen protection or vacuum sintering, multi pass hot forging/spinning, stress annealing, and CNC precision turning (taper, nose R angle, and tail shank fitting dimensions are strictly executed according to the customer's perforation machine drawings). Each batch retains sintering curves and density testing records, and the finished product density is stably controlled at ≥ 9.5 g/cm ³ (a high-density grade of ≥ 9.6 g/cm ³ can be provided upon request), with a uniform microstructure and no slag inclusions or pores. Important specifications can be matched with ultrasonic or penetrant testing (PT), and EN 10204 3.1 material certificates, chemical composition analysis reports, and dimensional testing records can be provided to meet the requirements of international third-party inspection agencies such as SGS/BV/T Ü V - this is particularly crucial for seamless pipe factories participating in cross-border project bidding and can be directly included as technical attachments in the bidding documents.
Customized drawings and matching with working conditions - solving the problem of "what should I do if my perforating machine model is special".
There are many types of seamless pipe mills (such as two roll Mannesmann skew rolling, three roll Assel, Accu Roll, etc.), with significant differences in top geometry. PESCO does not set up "mandatory sales of standard spot goods", but prioritizes assisting customers in confirming: existing perforation machine type/pipe blank diameter and material/target capillary inner diameter/current top drawing or sample size. On this basis, match or optimize:
Working diameter (D): Φ 20 mm~Φ 300 mm (larger sizes can be negotiated in sections).
Length (L): Customized according to the drawing, commonly 60-350 mm.
Conicity and working section contour, nose R-angle and stripping section geometry * * - affect penetration and smoothness of capillary detachment, and suggestions can be fine tuned according to actual steel adhesion conditions.
Surface condition: sintered/rough/fine polished (Ra ≤ 1.6 μ m), and can be pre coated with glass lubricant to improve the first furnace's anti sticking steel properties.
Brand options: TZM (mainstream), Mo La ₂ O ∝ (better resistance to thermal shock, suitable for small and medium-sized production lines with frequent cold and hot cycles), pure molybdenum (economical, low-alloy carbon steel pipe optional).
This process of "asking about the working conditions before coming up with a solution" has helped multiple overseas customers achieve the expected perforation meters in the first batch of mass production on the machine, avoiding the waste caused by blind procurement and incompatibility.
Common problems in use and PESCO process support - not only selling items, but also helping you make good use of them.
Customers often inquire: "Is there steel sticking in the first two pipes of the new top?" "How to extend the number of grinding and reuse times?" - In most cases, it is not a problem with the material itself, but rather a mismatch between lubrication and cooling systems. TZM will oxidize and evaporate in air above 400 ℃. When perforating, glass powder/water-based glass lubricant must be sprayed simultaneously to form an isolation film, which reduces friction and inhibits oxidation; After the water is discharged, it is recommended to control the water temperature and intermittent rhythm of the spray water cooling to avoid sudden cooling and thermal cracking. PESCO can provide adaptation suggestions based on your company's existing perforation parameters (billet temperature, roll angle, cooling water pressure, and current lubricant type) during the quotation stage, including the initial installation preheating system, recommended glass powder brand number range, and grinding allowance judgment method, to assist your company in maximizing the average reuse and grinding times of the top. This is what sets PESCO apart from simply being a "selling factory": participating in the stabilization and improvement of your company's perforation process.
Export delivery guarantee and project execution capability.
As a supplier with over 15 years of experience in exporting metallurgical consumables, PESCO understands that international procurement is most concerned about "delivery delays" and "discrepancies between documents". We promise:
Transparent delivery time: 20-30 working days from the confirmation of the drawings for regular non-standard sizes, and coordination for urgent insertion orders; Large orders will be delivered in stages to ensure continuous supply on the production line
Export packaging: each piece of head foam is wrapped separately → moisture-proof vacuum bag → multi-layer corrugated+fumigation wooden case reinforcement, suitable for ocean shipping and air transportation
Complete documents: commercial invoice, packing list, certificate of origin (CO/Form A/Euro 1 can be handled), material certificate EN 10204 3.1.
Minimum order and trial order: supports small batch trial orders (usually starting from 5-10 pcs, depending on size), and after verification, it will be transferred to the framework agreement for regular replenishment
Multilingual docking: English/Russian/Spanish technical communication to reduce deviation in understanding drawings
At present, PESCO TZM plugs have been exported with the seamless pipe production line to Japan, South Korea, Germany, Italy, the United States, India, Türkiye, Iran, Russia and many Southeast Asian countries, serving more than 40 pipe manufacturers in total, and maintaining zero quality complaint records.
When should we evaluate switching or trying out PESCO TZM molybdenum plugs?
If your company's production line shows the following signals, we suggest obtaining our technical analysis:
Frequent occurrence of spiral scratches or size deviations on the inner wall of stainless steel/duplex steel/high-temperature alloy capillary tubes
The current top head needs to be replaced at least twice per shift, which affects daily production
Repeated upsetting and deformation of the top and nose ends, severe steel sticking, and fast wear and tear during repair and grinding
In the technical specifications for new project bidding, the owner explicitly requires the use of refractory metal heads (CRA or high alloy tube perforation)
In the Seamless Steel Pipe oblique rolling piercing process, the piercing plug/Mandrel Head is the core consumable tool that directly extends into the center of the 1100-1250 ℃ red heat pipe blank, bears axial thrust, circumferential friction, and undergoes rapid cooling and heating cycles at the rate of one second. When the perforation object is austenitic stainless steel, duplex steel, bearing steel or high-temperature alloy pipe, the yield strength of conventional H13 or carbon steel head drops sharply in this temperature zone, which easily leads to nose end upsetting, surface cracking and steel sticking (pick-up), resulting in the inner diameter of the pipe exceeding the tolerance, inner wall spiral scratching and unplanned shutdown for head replacement. The TZM molybdenum alloy piercing plug (per ASTM B386 Type 364) has become the industry standard solution for high-end seamless pipe factories worldwide to deal with difficult to deform material piercing due to its high melting point of 2620 ℃, excellent high-temperature yield strength, and thermal fatigue resistance. PETROL STEEL CO., LTD (PESCO), as a manufacturer and exporter focusing on deep processing of refractory metals and supporting industrial pipes for more than 15 years and maintaining zero quality complaint record, provides global seamless pipe manufacturers with one-stop TZM piercing plug supply services from drawing interpretation, material selection, precision CNC processing to delivery of export documents. The products have been stably applied to steel pipe production lines in Japan, South Korea, Germany, India, Türkiye, Russia and Southeast Asia.
Why do stainless steel and high alloy seamless pipes rely on TZM molybdenum alloy plugs for perforation?
The instantaneous contact temperature between the top and nose during oblique rolling perforation often reaches over 1200 ℃, and is sprayed with cooling water to below 200 ℃ after each perforation - this thermal cycle has extremely strict requirements for the high-temperature strength and ductile brittle transition behavior of the material. TZM alloy (Mo-0.40~0.55% Ti-0.06~0.12% Zr-0.01~0.04% C, with a balance of Mo ≥ 99.3%) achieves precipitation strengthening and grain boundary pinning through TiC and ZrC second phase particles. The recrystallization temperature is increased by 100-150 ℃ compared to pure molybdenum, and the yield strength remains about 30-50% higher than pure molybdenum in the working temperature range of 1000-1200 ℃; Its thermal conductivity is about three times that of 304 stainless steel, which can quickly dissipate the frictional heat from the perforated area and delay the surface temperature rise. Actual production line comparison shows that under the same working conditions, the single perforation length of TZM head is usually 8-15 times that of carbon steel head. The decrease in head replacement frequency means an increase in effective operation rate and a decrease in the amortization cost of unit billet head. This is also the fundamental reason why more and more international EPC and independent seamless pipe factories explicitly require the use of TZM molybdenum head in the stainless steel/high-temperature alloy perforation section in their technical transformation specifications. PESCO not only supplies, but also assists customers in determining whether the current production line has reached the upgrade node during the inquiry stage, avoiding implicit capacity losses caused by incompatible heads.
PESCO Manufacturing Capability: Fully Controlled Process from Isostatic Pressure Powder Metallurgy to Precision Finished Products.
We are well aware that the lifespan of the top not only depends on the grade, but also on the uniformity of density and the geometric accuracy of machining. The PESCO TZM perforation head is made of high-purity molybdenum powder with a precise ratio of TiH ₂/ZrH ₂/graphite additives. It undergoes three-dimensional mixing, cold isostatic pressing (CIP), high-temperature hydrogen protection or vacuum sintering, multi pass hot forging/spinning, stress annealing, and CNC precision turning (taper, nose R angle, and tail shank fitting dimensions are strictly executed according to the customer's perforation machine drawings). Each batch retains sintering curves and density testing records, and the finished product density is stably controlled at ≥ 9.5 g/cm ³ (a high-density grade of ≥ 9.6 g/cm ³ can be provided upon request), with a uniform microstructure and no slag inclusions or pores. Important specifications can be matched with ultrasonic or penetrant testing (PT), and EN 10204 3.1 material certificates, chemical composition analysis reports, and dimensional testing records can be provided to meet the requirements of international third-party inspection agencies such as SGS/BV/T Ü V - this is particularly crucial for seamless pipe factories participating in cross-border project bidding and can be directly included as technical attachments in the bidding documents.
Customized drawings and matching with working conditions - solving the problem of "what should I do if my perforating machine model is special".
There are many types of seamless pipe mills (such as two roll Mannesmann skew rolling, three roll Assel, Accu Roll, etc.), with significant differences in top geometry. PESCO does not set up "mandatory sales of standard spot goods", but prioritizes assisting customers in confirming: existing perforation machine type/pipe blank diameter and material/target capillary inner diameter/current top drawing or sample size. On this basis, match or optimize:
Working diameter (D): Φ 20 mm~Φ 300 mm (larger sizes can be negotiated in sections).
Length (L): Customized according to the drawing, commonly 60-350 mm.
Conicity and working section contour, nose R-angle and stripping section geometry * * - affect penetration and smoothness of capillary detachment, and suggestions can be fine tuned according to actual steel adhesion conditions.
Surface condition: sintered/rough/fine polished (Ra ≤ 1.6 μ m), and can be pre coated with glass lubricant to improve the first furnace's anti sticking steel properties.
Brand options: TZM (mainstream), Mo La ₂ O ∝ (better resistance to thermal shock, suitable for small and medium-sized production lines with frequent cold and hot cycles), pure molybdenum (economical, low-alloy carbon steel pipe optional).
This process of "asking about the working conditions before coming up with a solution" has helped multiple overseas customers achieve the expected perforation meters in the first batch of mass production on the machine, avoiding the waste caused by blind procurement and incompatibility.
Common problems in use and PESCO process support - not only selling items, but also helping you make good use of them.
Customers often inquire: "Is there steel sticking in the first two pipes of the new top?" "How to extend the number of grinding and reuse times?" - In most cases, it is not a problem with the material itself, but rather a mismatch between lubrication and cooling systems. TZM will oxidize and evaporate in air above 400 ℃. When perforating, glass powder/water-based glass lubricant must be sprayed simultaneously to form an isolation film, which reduces friction and inhibits oxidation; After the water is discharged, it is recommended to control the water temperature and intermittent rhythm of the spray water cooling to avoid sudden cooling and thermal cracking. PESCO can provide adaptation suggestions based on your company's existing perforation parameters (billet temperature, roll angle, cooling water pressure, and current lubricant type) during the quotation stage, including the initial installation preheating system, recommended glass powder brand number range, and grinding allowance judgment method, to assist your company in maximizing the average reuse and grinding times of the top. This is what sets PESCO apart from simply being a "selling factory": participating in the stabilization and improvement of your company's perforation process.
Export delivery guarantee and project execution capability.
As a supplier with over 15 years of experience in exporting metallurgical consumables, PESCO understands that international procurement is most concerned about "delivery delays" and "discrepancies between documents". We promise:
Transparent delivery time: 20-30 working days from the confirmation of the drawings for regular non-standard sizes, and coordination for urgent insertion orders; Large orders will be delivered in stages to ensure continuous supply on the production line
Export packaging: each piece of head foam is wrapped separately → moisture-proof vacuum bag → multi-layer corrugated+fumigation wooden case reinforcement, suitable for ocean shipping and air transportation
Complete documents: commercial invoice, packing list, certificate of origin (CO/Form A/Euro 1 can be handled), material certificate EN 10204 3.1.
Minimum order and trial order: supports small batch trial orders (usually starting from 5-10 pcs, depending on size), and after verification, it will be transferred to the framework agreement for regular replenishment
Multilingual docking: English/Russian/Spanish technical communication to reduce deviation in understanding drawings
At present, PESCO TZM plugs have been exported with the seamless pipe production line to Japan, South Korea, Germany, Italy, the United States, India, Türkiye, Iran, Russia and many Southeast Asian countries, serving more than 40 pipe manufacturers in total, and maintaining zero quality complaint records.
When should we evaluate switching or trying out PESCO TZM molybdenum plugs?
If your company's production line shows the following signals, we suggest obtaining our technical analysis:
Frequent occurrence of spiral scratches or size deviations on the inner wall of stainless steel/duplex steel/high-temperature alloy capillary tubes
The current top head needs to be replaced at least twice per shift, which affects daily production
Repeated upsetting and deformation of the top and nose ends, severe steel sticking, and fast wear and tear during repair and grinding
In the technical specifications for new project bidding, the owner explicitly requires the use of refractory metal heads (CRA or high alloy tube perforation)
Our sales engineers can provide feasibility analysis, recommended grades, and formal FOB/CIF quotations within 24 hours after receiving your top drawings/sample photos/existing specifications.
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For more info and price of TZM Molybdenum Piercing Plug and the specifications, please send us the inquiry, you will get the quick reply soon.
Headquater: A-4F, Vantone Center, A6, Chaowai St., Chaoyang Dist., Beijing, China.
Tel/Fax: +86 10 8599 9168
Whatsapp/Wechat: 0086 159 0035 7871
Email: sales@petrolsteel.com, jackywinn@foxmail.com
