DIN 17175 Seamless Steel Pipe Price

For 2025 the DIN 17175 family of heat-resistant seamless steel tubes remains a widely used specification for boiler, pressure and high-temperature service; typical market pricing in mid-2025 varied by grade and origin, roughly ranging from about USD 600–1,300 per tonne for common DIN-17175 carbon/chrome-moly seamless grades from Chinese exporters, with Western domestic finished-product prices often higher due to production and logistics premiums.

What DIN 17175 specifies

DIN 17175 is a German standard governing seamless circular tubes made from non-alloy and low-alloy steels for elevated temperature service. Its scope covers tubes intended for boiler installations, steam generators, pipelines, pressure vessels and associated equipment designed for elevated temperatures—commonly cited working ranges up to about 600 °C for many of the heat-resistant grades. The standard defines permitted chemical ranges, mechanical properties, testing and acceptance criteria appropriate for long-term use under thermal stress.

Historical and standards context

DIN 17175 has existed for decades and remains referenced by manufacturers and traders, but in practice many markets now align with the EN series (notably EN 10216-2 for seamless steel tubes for pressure purposes). In industry practice you’ll frequently see equivalence claims between DIN 17175 grades and those in EN/ASME systems; purchasers must therefore check the exact material designation and heat-treatment/inspection class on any purchase order.

Why this matters: quoting “DIN 17175” in an RFQ gives engineers confidence about intended service conditions, but final acceptance and interchangeability often depend on precise chemical numbers, tensile/yield minima, impact requirements and whether the product meets an EN/ASME counterpart.

Typical DIN 17175 grades and short chemistry notes

Below are the most frequently encountered grades you will see when buyers specify DIN 17175 pipes. We list common commercial names and the core alloying elements that determine high-temperature strength and oxidation resistance.

• St35.8 / ST 35.8 — a non-alloy carbon boiler steel commonly used for lower temperature boiler tubing.

• 15Mo3 (often referenced to 16Mo3 in EN listings) — a molybdenum-bearing boiler steel used for elevated temperatures; often cited for steam service.

• 13CrMo44 (steel number 1.7335, sometimes listed as 13CrMo4-5) — a chrome-moly low-alloy grade with roughly 0.1–0.18% C, ~0.7–1.1% Cr and ~0.4–0.6% Mo; good balance of strength and weldability for superheater and reheater tubing.

• 10CrMo9-10 (steel number 1.7380) — a 2.25Cr-1Mo class higher-alloy grade: roughly 2.0–2.5% Cr and 0.9–1.2% Mo; used where higher creep strength and corrosion resistance at elevated temperature are required.

Note: industry naming conventions differ between DIN, EN and ASME. For example, 15Mo3 / 16Mo3 appear in both DIN/EN systems with slight numeric variations; always cross-check steel numbers (EN/steel number like 1.7335, 1.7380, 1.5415) against the required mechanical characteristics.

Mechanical properties, testing and acceptance (what to require)

When you specify DIN 17175 material for pressure or high-temperature service, include the following minimum elements in the order:

• Chemical analysis (mill test certificate / MTC). Request full heat-analysis and acceptance tolerances.

• Tensile and yield strength minima by thickness classes (DIN and EN documents specify limits by nominal thickness). Typical yield minima for low-alloy grades are in the ~250–300 MPa range with tensile up to ~550–600 MPa for some alloys; verify per grade and thickness.

• Impact testing (Charpy) where required by the purchaser, or notch-toughness standards for lower-temperature service.

• NDT requirements — eddy current or ultrasonic wall-and-seam testing for seamless tubes; hydrostatic testing of finished lengths if requested.

• Heat treatment and conditioning — whether delivered normalized, annealed or quenched/tempered (state why your project needs a specific condition).

• Surface finish and straightness tolerances — cold-drawn versus hot-finished tolerances differ; cold-drawn tubes have better dimensional precision. Suppliers will offer both hot-rolled/hot-finished and cold-drawn / cold-finished product options.

A practical procurement tip: request the steel number (e.g., 1.7335) and the equivalent EN/ASME designation in the contract. That removes ambiguity in cross-border trades.

Manufacturing routes and finishing (how the pipe characteristics are created)

Seamless tubes under DIN 17175 are produced either by:

• Hot rolling and hot finishing (piercing, rolling, sizing): faster, economical for large diameters and heavy wall thicknesses. Typical for boiler tubes with heavier gauge.

• Cold drawing/cold rolling (followed by annealing where needed): used when tighter OD/ID tolerances and better surface quality are required. Cold-drawn product is common for smaller diameters and heat-exchanger style tubing.

Common surface treatments include: black (uncoated) finish, pickled/bright, sand-blasted for non-scale surface, and galvanizing only when specified for corrosion protection (galvanizing is not typical for high-temperature boiler service). Inspection regimes commonly include eddy-current testing for small diameters and ultrasonic inspection for larger units.

Global price comparison — practical ranges for 2025

Below we summarize market price ranges observed in mid-2025. Prices depend strongly on grade (plain carbon vs chrome-moly), OD/wall, production method (cold drawn premium), order quantity, and delivery Incoterm.

Global price comparison (typical mid-2025 examples, USD per tonne)

How to read this table: these are indicative market bands for common sizes/grades in mid-2025. Exact quotes will vary with diameters, wall thickness, heat treatment, testing scope, incoterm and order size. Multiple Chinese listing pages in 2025 showed many offers between USD ~600 and 1,350/ton for DIN-17175 tubes; established Western market indicators and finished-product lists typically sit above these ranges due to extra processing and domestic cost structure.

Why prices moved the way they did in 2025

We observe several simultaneous forces that set the 2025 price landscape:

1. Raw material base (hot-rolled coil and billets): steel coil and billet block price movements remain the single biggest input. During 2025 spot HRC/CRC swings influenced mill selling prices and downstream pipe quotes. Market reports in 2025 showed spot HRC benchmarks around the high-hundreds USD/ton.

2. Grade complexity: chrome-moly alloying (Cr + Mo) and controlled heat treatment add cost versus plain carbon grades. 10CrMo9-10 and 13CrMo44 carry alloy premiums.

3. Energy and processing: cold-drawn product, special heat treatments and additional NDT increase per-ton cost.

4. Trade measures & tariffs: trade policy shifts and duties (or revised import tariffs) raise landed costs for certain regions; buyers in those markets frequently pay a country-specific premium. News around trade policy and tariff changes in 2025 materially impacted landed costs in North America in particular.

5. Logistics & container freight: post-pandemic freight normalization improved delivery reliability but costs still add a non-trivial per-ton freight cushion for overseas orders.

6. Order size & MOQ: many suppliers quote lower unit prices only for large tonnages; small sample orders attract sizeable per-ton premiums.

Practical procurement checklist (what we always specify)

When preparing an RFQ or purchase specification for DIN 17175 seam-less tubes, include the following items verbatim:

• Standard: “DIN 17175 — Seamless tubes of heat-resistant steels for boiler and pressure purposes.” If EN equivalent is acceptable, state the permitted equivalence (e.g., EN 10216-2).

• Material grade and steel number: (e.g., 13CrMo44 / 1.7335 or 10CrMo9-10 / 1.7380).

• Nominal OD / wall thickness / length / tolerance class.

• Manufacturing method: hot-finished or cold-drawn.

• Heat treatment required at delivery (normalized, annealed, etc.).

• Testing: specify MTC (EN 10204/3.1 or 3.2 as required), tensile, impact (if required), chemical analysis, NDT (UT/eddy), hydrotest if applicable.

• Surface finish & coating: e.g., “bright annealed” or “black with anti-rust oil”.

• Packing and shipping: bundling, end caps, wood crating for export.

• Delivery term: Incoterm (FOB, CFR, CIF, EXW).

• Warranty & acceptance: inspection rights at mill/warehouse; reserve right to reject on failed mechanical or chemical tests.

Including these items up front avoids ambiguous supplier quotes and hidden surcharges.

Quality assurance: what to review on delivered material

On receipt we recommend the following checks before acceptance and fabrication:

• Verify MTC (heat number matches stamping on tube).

• Confirm chemical composition entry for carbon, chromium and molybdenum against the specification.

• Check hardness and perform coupon tensile sample testing if required by contract.

• Visual inspection for surface defects and internal lamination (if suspect, request UT).

• Dimensional check (OD/ID/wall) on representative samples.

• Ensure traceability chain from melt to finished tube is documented.

Supply chain notes and lead times (what we find in the market)

Typical lead times depend on grade and quantity:

• Standard carbon grades (large mills, hot-finished): 2–6 weeks for bulk orders if in stock.

• Chrome-moly grades with special heat treatments or small MOQ: 4–12 weeks, depending on mill backlog.

• Custom sizes or strict NDT/third-party inspection: add 1–3 weeks.

China exporters commonly offer competitive pricing for bulk loads with FO B or CIF incoterms; European mills typically require higher minimum order values but offer stronger documentation and compliance with EN/ASME traceability expectations.

Environmental, recycling and sustainability considerations

Steel tubes are recyclable and many OEMs now request recycled content statements or mill carbon-intensity data. When a project has sustainability requirements, ask mills for:

• Environmental management certificates (ISO 14001).

• Scope 1/2 carbon reporting or a GHG intensity statement per tonne (where available).

• Percentage recycled content in process scrap streams (mill proprietary data).

Sustainable procurement may add a cost premium but can be essential for public projects or ESG-driven procurement.

Common pitfalls & how we avoid them

• Ambiguous grade names: don’t accept only “DIN 17175” without steel number or equivalent; require 1.7335 / 1.7380, etc.

• Insufficient test certificates: always require EN 10204 3.1/3.2 when project QA demands independent verification.

• Mixing hot-finished and cold-drawn expectations: specify tolerance classes.

• Small orders with high unit cost: consolidate procurement to leverage tonnage discounts.

FAQs

Q1 — Is DIN 17175 still current, or has it been replaced?
DIN 17175 remains widely used in supplier literature and RFQs for historical and project continuity reasons. In practice many projects reference EN equivalents (EN 10216-2 and related EN/ASME standards). Always specify the steel number and the test/inspection class you require to avoid ambiguity.

Q2 — Which grade should I use for superheater tubes at ~550 °C?
For higher temperature and creep resistance you typically specify a chrome-moly grade such as 10CrMo9-10 (1.7380) or a similarly rated alloy; selection should be validated against creep data for the specific operating temperature and expected lifetime.

Q3 — How much more does a chrome-moly alloy cost versus plain carbon in 2025?
Premiums depend on market and quantity, but in mid-2025 chrome-moly grades commonly carried a several-hundred-dollars-per-ton premium over plain carbon seamless tubes in most export quotes. Ask suppliers for grade-specific quotes and check whether heat treatment and testing scope are bundled.

Q4 — Can I substitute an EN/ASTM grade for DIN 17175 material?
Substitution is possible when the mechanical, chemical and testing specs match. Cross-reference steel numbers (EN steel number or ASTM designation) and confirm testing/heat-treatment classes. For critical pressure-or-safety equipment, get engineering approval before substitution.

Q5 — What are realistic order quantities and MOQ expectations from Asian mills?
Many Chinese exporters will accept small MOQs (1–3 tonnes) but at higher unit price; better unit economics appear at tens of tonnes. For mill production runs, expect minimum economic batches that will reflect in lead time and price. Always clarify MOQ, lead time and price breakpoints in the RFQ.