DIN 17175 was a German standard covering seamless tubes made from heat-resistant steels for elevated-temperature service.
Referenced Standard Edition: DIN 17175:1979-05
Standard Title: Seamless Tubes of Heat-Resistant Steels — Technical Conditions of Delivery
DIN 17175 has been withdrawn and superseded by the DIN EN 10216-2 standard series.
It remains relevant for replacement tubes, existing boiler systems, legacy engineering drawings and projects where DIN 17175 material grades are still specified.
Common DIN 17175 grades include the following.
| Steel Grade | Material Number |
|---|---|
| St35.8 | 1.0305 |
| St45.8 | 1.0405 |
| Steel Grade | Material Number |
|---|---|
| 15Mo3 | 1.5415 |
| 13CrMo44 | 1.7335 |
| 10CrMo910 | 1.7380 |
Other legacy DIN 17175 grades can be reviewed against the original project specification.
The required grade should be identified from the original equipment drawing, material list or purchasing specification before quotation and production.
DIN 17175 was replaced during the transition to the European EN 10216 pressure-tube standard system. Several familiar DIN material designations were changed or replaced under EN 10216-2.
| Legacy DIN 17175 Grade | Associated EN 10216-2 Grade Reference |
|---|---|
| St35.8 | P235GH |
| St45.8 | P265GH |
| 15Mo3 | 16Mo3 |
| 13CrMo44 | 13CrMo4-5 |
| 10CrMo910 | 10CrMo9-10 |
These relationships are legacy-to-current material references, not automatic one-to-one substitutions.
Chemical composition, mechanical properties, heat treatment, inspection requirements and other technical conditions were revised during the transition from DIN 17175 to EN 10216-2.
For replacement projects, material substitution should be approved against the applicable equipment design code, original material specification and engineering requirements.
DIN 17175 includes several heat-resistant steel systems rather than one common chemical composition or mechanical-property requirement.
| Steel Grade | Material Description & Typical Use |
|---|---|
| St35.8 / St45.8 | Non-alloy steels historically specified for boiler and pressure applications requiring elevated-temperature properties |
| 15Mo3 | Molybdenum-alloyed heat-resistant steel used in elevated-temperature boiler and pressure applications |
| 13CrMo44 | Chromium-molybdenum heat-resistant steel used where higher-temperature strength than conventional non-alloy boiler steels is required |
| 10CrMo910 | Higher Cr-Mo alloy steel historically specified for elevated-temperature boiler and pressure components |
Chemical composition, mechanical properties and heat-treatment requirements should be verified against the exact DIN 17175 grade and original project specification.
Heat-treatment requirements under DIN 17175 depend on the steel grade and manufacturing condition. Non-alloy and alloy grades have different delivery and heat-treatment requirements.
For legacy DIN 17175 orders, the required condition should be confirmed against:
Where a current EN material is proposed as a replacement, the applicable EN 10216-2 delivery condition should be used rather than assuming the original DIN heat-treatment requirements remain unchanged.
Inspection requirements should follow the specified DIN 17175 grade and original purchasing requirements for legacy orders.
Project inspection can include:
For replacement projects, original equipment documentation should be reviewed before defining the inspection plan.
| Parameter | Capability |
|---|---|
| Manufacturing | Cold Drawn / Cold Rolled |
| Outside Diameter | 6–114 mm |
| Wall Thickness | 0.8–25 mm |
| Length | Up to 40 m |
| Heat Treatment | Grade / Project Specific |
| Inspection | According to Grade / Project Specification |
| Testing Capability | Hydrostatic / UT / ET as specified |
| Documentation | MTC / EN 10204 documentation / TPI as required |
| Third-Party Inspection | Available upon request |
| Custom Sizes | Subject to grade and technical review |
| MOQ | According to grade, size and production requirements |
FYN manufacturing capability and DIN 17175 legacy standard requirements are stated separately.
Grade and size availability are confirmed according to the exact material grade, dimensions, heat treatment, inspection requirements and project specification.
DIN 17175 seamless heat-resistant steel tubes remain relevant primarily for existing equipment and legacy projects originally designed around DIN material specifications.
For replacement and maintenance of boiler heating surfaces originally specified with DIN 17175 material.
For existing steam and pressure systems where DIN 17175 grades are identified in the original engineering specification.
For replacement tubes and pressure-part fabrication where compatibility with existing equipment must be maintained.
For power plants, industrial boilers and process plants requiring replacement of tubes originally supplied under DIN 17175.
For new equipment, material selection should normally be based on the applicable current standard and design code.
Available documentation can include:
For legacy replacement projects, copies of the original MTC, drawing or material specification are recommended for technical review.
Typical export packing includes:
Long-length tubes may require special packing and transportation arrangements.
Production lead time depends on grade, dimensions, quantity, heat treatment and inspection requirements.
DIN 17175 is a withdrawn standard. For existing equipment, replacement tubes or legacy projects, the original drawing, material specification and required DIN grade should be provided for technical review.
For quotation, please specify:
DIN 17175 + Grade + OD × Wall Thickness × Length + Quantity
| Required Information | Details |
|---|---|
| Standard | DIN 17175 |
| Steel Grade | Exact legacy DIN grade required |
| Outside Diameter | Required outside diameter |
| Wall Thickness | Required wall thickness |
| Length | Required tube length |
| Quantity | Required order quantity |
| Original Technical Documents | Original drawing or material specification, if available |
| Existing Material Certificate | Existing MTC, if available |
| Heat Treatment | Required heat-treatment condition |
| Dimensional Tolerances | Required dimensional tolerances |
| Testing | Hydrostatic / NDT requirements |
| Documentation | Inspection documentation requirements |
| Third-Party Inspection | If required |
| Delivery | Delivery destination |
For new projects, the applicable current standard should be confirmed before material selection. EN 10216-2 is the relevant successor standard for seamless pressure tubes with specified elevated-temperature properties.
For an accurate quotation, please send your required steel grade, outside diameter, wall thickness, length and quantity.
For legacy or replacement orders, attach the original drawing, tube specification or existing MTC whenever available for material review before quotation.
If a current EN grade is required as a replacement, FYN can review the original DIN material together with the applicable EN 10216-2 requirement before quotation.
