DIN 1629 Seamless Steel Pipe Price 2025

DIN 1629 seamless pipes by grade (St37.0 / St44.0 / St52.0), exact OD and wall thickness, and by finish (hot-rolled, peeled, cold-drawn) to get realistic 2025 pricing: expect a wide band depending on origin and finish — roughly USD 400–1,800 per metric ton for ordinary carbon DIN 1629 items from major suppliers in 2025, with stainless or special grades commanding much higher premiums. The most reliable way to lock a competitive price is to provide a precise drawing, lot size, delivery Incoterm and inspection rules up front; we can help prepare those buyer specifications.

What is DIN 1629?

DIN 1629 is a German standard that covers seamless circular tubes of unalloyed (carbon) steels produced for mechanical and structural applications. It defines permitted steel grades, basic dimensional ranges, manufacturing types (hot-rolled, hot-rolled peeled, cold-worked), and limits on workmanship and tolerances. Pipes under DIN 1629 are normally not intended for heat treatment or high-pressure service where a dedicated pressure-pipe standard would be required.

Common grades and their role

We typically see three carbon grades in DIN 1629 production:

• St 37.0 — general structural carbon steel with modest strength; economical for non-critical structural components.

• St 44.0 — intermediate strength offering a balance between cost and mechanical properties.

• St 52.0 — higher strength; chosen when greater load capacity or reduced wall thickness is needed.

Each grade has distinct guaranteed tensile/yield ranges and chemical limits. When buyers list mechanical properties rather than only the grade name, manufacturers can better optimize heat treatment and cold finishing to meet both price and performance targets.

Dimensional ranges, tolerances and finishes

DIN 1629 sets dimensional bands and manufacturing finishes that directly affect price.

• Diameter & wall thickness: the standard covers small precision tubes through medium diameters used in machinery. Tolerances differ by process:

  • Hot-rolled (OD ≤ 80 mm and OD > 80 mm rules).

  • Hot-rolled peeled (zero or positive OD tolerance, tighter wall tolerance).

  • Cold-worked (cold-rolled/cold-drawn) — tightest tolerances, smallest diameters.

• Finish choices:

  • Hot-rolled is lowest cost but rougher surface and wider tolerances.

  • Peeled reduces surface defects and tightens OD — increases cost modestly.

  • Cold-drawn gives best dimensional control and surface — cost premium can be significant.

We recommend buyers list: grade, exact OD, wall thickness, tolerance class, length tolerance, and whether ends should be plain cut, chamfered, or beveled. That eliminates ambiguity and avoids costly change orders.

How manufacturing choices change the price

Several process steps raise unit cost; we summarize the major ones:

• Raw steel input: billet or bar quality influences scrap loss and mechanical properties. Cleaner steel reduces downstream rework.

• Forming route: hot rolling is cheap; peeling and cold drawing add time, tooling and scrap.

• Heat treatment / annealing: cold-worked tubes often need intermediate anneals; each anneal adds energy/time cost.

• Straightening, sizing, shot-blasting and testing: precision straightening, honing or ultrasonic testing raise cost but are necessary in critical uses.

• Certification & inspection: 3.1/3.2 certificates, third-party inspection and chemical analysis add to the invoice but are non-negotiable for many OEMs.

Put simply: the more precision and testing you require, the greater the price per ton. The buyer should balance functional need with budget.

Mechanical properties and quality control

We ask for the following on every DIN 1629 specification:

• Yield strength, tensile strength and elongation requirements for the selected grade.

• Hardness limits (if applicable).

• Non-destructive testing (NDT) level — visual only, ultrasonic, or eddy current.

• Dimensional inspection plan and permitted rejection rates.

Routine mill tests plus an independent final inspection give the best assurance of repeatability. For high-value contracts, insist on weldability data and supply of MTC (mill test certificate) traceable to EN/DIN batch numbers.

Typical applications and limitations

DIN 1629 tubes are widely used for:

• Mechanical engineering and frames.

• General structural parts where tight pressure containment isn’t required.

• Shafts, pins, and components machined from seamless tubing.

They are not substitutes for pipes engineered for pressure service (e.g., EN 10216-1) unless the designer validates the use. Temperature limitations are commonly specified — many DIN 1629 steels are intended for service below ~300 °C unless otherwise qualified.

Market factors shaping 2025 prices

Multiple macro and micro factors changed how DIN 1629 products were priced in 2025. We highlight the principal drivers:

• Raw steel commodity prices: fluctuations in hot-rolled coil affect the base metal cost embedded in seamless pipe. Spot HRC pricing in 2025 varied regionally and influenced mill offers.

• Export/import flows and duties: export volumes and average export prices from major manufacturing countries shifted pricing; Chinese export averages in recent data point to mid-four-figure USD per ton levels in the recent period.

• Trade policy and tariffs: changes to import duties (for instance recent tariff activity affecting the U.S. market) create a direct cost increase for import-reliant buyers and raise the landed cost of pipe in affected markets.

• Energy and shipping: higher energy and freight costs through 2024–2025 lifted finished-goods prices and minimum lot economics.

• Supply chain specialization: tighter seller discipline on minimum order quantities (MOQs), test certificates, and lead times meant small buyers pay a premium per kg.

These drivers explain why identical DIN 1629 items can show several hundred percent difference in published supplier quotes depending on origin, finish and lot size.

Global price comparison — indicative ranges for 2025

Note: these are indicative commercial ranges for standard carbon DIN 1629 seamless tubes (St37/St44/St52), in commonly traded lengths, based on market reports and supplier listings from 2024–2025. Actual quotes depend on grade, finish, inspection, quantity and Incoterm.

How to read the table: low-end figures represent basic hot-rolled, non-peeled, bulk MOQ shipments from large Asian mills. High-end figures represent precision cold-drawn items, peeled finishes, or finished/stainless grades and small-lot deliveries with third-party inspection.

Practical purchasing checklist

When you request a quote, include:

1. Exact standard & grade: “DIN 1629 St52.0” or equivalent.

2. OD × wall × length, and tolerance class.

3. Finish: hot-rolled / hot-rolled peeled / cold-drawn.

4. Quantity (metric tons or pieces).

5. Inspection & certificates: mill test certificate (EN 10204 2.1/3.1/3.2), ultrasonic, PMI if required.

6. Delivery term (FOB / CIF / DDP) and destination port.

7. Packaging requests and marking.

8. Payment & lead time expectations.

If you leave any of the above unspecified, suppliers assume a default (often hot-rolled with minimal inspection), which can cause compliance gaps later.

Avoiding common cost traps

We commonly see these hidden cost drivers:

• Specification creep: changing tolerance or test requirements after PO leads to rework and extras.

• Small lots: customers ordering under mill MOQs see sharp per-kg premiums.

• Late inspection cancellations: if the buyer declines a planned third-party check at the mill, the supplier may withhold release or charge re-inspection fees.

• Inconsistent drawing vs. standard reference: a mismatch between buyer drawing and the labelled standard causes disputes on acceptance tolerance.

We advise a pre-quote technical checklist and a short technical annex to the purchase order to eliminate ambiguity.

Quality assurance, certification and traceability

For projects with safety or regulatory sensitivity, require:

• EN 10204 mill test certificate (3.1 or 3.2) for chemical and mechanical confirmation.

• Heat/batch traceability from steelworks to finalize piping.

• Third-party inspection (if project requires).

• NDT records (UT/eddy current) for continuous production runs.

Traceability and documentation increase cost by a modest percent but save three-to-five times that cost when material fails audit.

Sustainability and circularity considerations

As procurement policies tighten, recycled steel content and energy intensity of production affect long-term supplier selection. Buyers who require low-carbon declarations or EPDs (environmental product declarations) should expect lead times and prices to reflect lower availability of certified low-carbon feedstocks.

How we at Luokaiwei support procurement

We help clients by:

• Translating engineering drawings into unambiguous purchase specs.

• Running a cost-benefit for finish vs. performance (e.g., whether a peeled surface is necessary).

• Sourcing multiple mill quotes and consolidating inspection plans to reduce fragmentation.

• Preparing contract annexes for inspection, rejection thresholds and packing.

Our approach reduces downstream surprises and lets buyers compare apples-to-apples between mills.

Sample specification template (copy and use)

Buyer: ____
Standard: DIN 1629
Grade: St52.0 (or specify)
OD × WT: 42.4 mm × 3.6 mm
Length: 6,000 mm ± 5 mm
Finish: Cold drawn, honed (or hot-rolled peeled)
Tolerances: Follow DIN 1629 cold-worked tolerances
Inspection: EN 10204 3.1; UT 100%; Satisfactory visual exam
Qty: 10 MT
Delivery: FOB Shanghai (or specify)
Payment & Lead Time: 30% T/T deposit; balance against BL; lead time 30–45 days after deposit.

Use this template to reduce quoting ambiguity.

FAQs

Q1 — What’s the cheapest way to buy DIN 1629 pipe?
We state the economy path: specify hot-rolled finish, large lot size, minimal third-party inspection, and accept mill standard packaging. That reduces unit cost but may not be appropriate where tight tolerances or traceability are required.

Q2 — How much does cold-drawing cost extra?
Cold-drawing and finishing usually add a premium relative to hot-rolled tubing. The incremental cost depends on diameter and batch size, but expect an uplift that can range from 10% to 50% compared with basic hot-rolled product for small to medium diameters.

Q3 — Are DIN 1629 tubes pressure-rated?
Typically DIN 1629 is not a pressure-pipe standard. If you need guaranteed pressure service, choose a pressure-pipe standard (examples include EN 10216 series). If you intend to use DIN 1629 in mild pressure service, get engineering acceptance and a calculation demonstrating the wall thickness and grade meet required safety factors.

Q4 — Why do Chinese export prices differ from Chinese domestic prices?
Domestic prices often reflect local market supply/demand and short lead logistics; exports must factor freight, export inspections, packaging for sea shipment, and sometimes quality upgrades — all of which push export quotes higher than a local domestic mill floor price. Recent statistics show average export unit prices higher than some reported domestic floor prices in 2024–2025.

Q5 — How do tariffs or trade policy affect my landed cost?
Tariffs, antidumping duties, or sudden changes in import policy can materially change landed cost. Recent changes announced in late 2024–2025 demonstrate the point: duty adjustments can add a meaningful percentage to the buyer’s invoice and influence suppliers’ decisions to route shipments through different hubs. Buyers should model landed cost including possible duty scenarios before awarding long-term contracts.