Introduction to DIN 17175 alloy steel pipe specifications

Introduction to DIN 17175 Alloy Steel Pipe Standards

DIN 17175 alloy steel pipes are high-temperature resistant pipes designed for use in high-pressure environments, typically operating at temperatures up to 600°C. These pipes are widely used in industrial applications such as boiler construction, piping systems, pressure vessels, and related equipment where strength and thermal stability are critical.

Chemical Composition:

Grade Chemical Composition (%)
C Si Mn P S Ni Cr Mo Others
St35.8 0.17Max 0.10~0.35 0.40~0.80 0.040Max 0.040Max - - - -
St45.8 0.21Max 0.10~0.35 0.40~1.20 0.040Max 0.040Max - - - -
17Mn4 0.14~0.20 0.20~0.40 0.90~1.20 0.040Max 0.040Max - 0.30Max - -
19Mn5 0.17~0.22 0.30~0.60 1.00~1.30 0.040Max 0.040Max - 0.30Max - -
15Mo3 0.12~0.20 0.10~0.35 0.40~0.80 0.035Max 0.035Max - - 0.25~0.35 -
13CrMo910 0.10~0.18 0.10~0.35 0.40~0.70 0.035Max 0.035Max - 0.70~1.10 0.45~0.65 -
10CrMo910 0.08~0.15 0.50Max 0.40~0.70 0.035Max 0.035Max - 2.00~2.50 0.90~1.20 -
14MoV63 0.10~0.18 0.10~0.35 0.40~0.70 0.035Max 0.035Max - 0.30~0.60 0.50~0.70 V: 0.22~0.32
X20CrMoV121 0.17~0.23 0.50Max 0.40~0.70 0.030Max 0.030Max 0.30~0.80 10.00~12.50 0.80~1.20 V: 0.25~0.35

Mechanical Properties:

Grade Material Number MPa or N/mm²
Min Yield Point Tensile Strength
WT: 16mm Max WT: 16–40mm
St35.8 1.0305 235 225 360–480
St45.8 1.0405 - 245 410–530
17Mn4 1.0481 - 275 460–580
19Mn5 1.0482 - 315 510–610
15Mo3 1.5415 275 275 450–600
13CrMo910 1.7335 295 295 440–590
10CrMo910 1.7380 285 285 450–600
14MoV63 1.7715 325 325 460–610
X20CrMoV121 1.4922 490 490 690–850

DIN 17175 standards provide a comprehensive framework for the selection of alloy steel pipes based on their chemical composition and mechanical properties. These specifications ensure that the materials meet the required performance criteria for high-temperature and high-pressure applications. Understanding these grades helps engineers and designers choose the most suitable material for their specific industrial needs, ensuring safety, durability, and efficiency in operation.

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