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din 17175 alloy steel pipes are of heat resistant pipe and used for high pressure and up to 600℃, application fields include: construction of boilers, pipe-lines, pressure vessels and equipment.
standard | din 17175 |
equivalent standards | en 10216-2, astm a213, asme sa213, astm a335 |
material | 10crmo44, gr.a b,10#,20#,35#,45#,a106,a36,16mn(q345b),x42-x70, p11,p22,p9,p5 or as client’s demands |
thickness | wt:3-60mm (sch10 to sch160) |
out diameter | 1/8-36inch(10.3mm-914.4mm) |
length | 5800mm; 6000mm; 10000mm; 11500mm; 11800mm; and so on. |
max length | 18000mm |
outside diameter & tolerance :
outside diameter, mm | tolerance, % |
od≤120 | ±0.6, 0.25mm min |
od>120 | ±0.75 |
wall thickness & tolerance of din 17175 st35.8 tubes
outside diameter , mm | wall thickness, mm | tolerance, % |
od≤130 | wt≤2*s(din 2448) | +15/-10 |
2*s(din 2448)＜wt≤4*s(din 2448) | +12.5/-10 | |
wt>4*s(din 2448) | ±9 | |
130＜od≤320 | wt≤0.05*od | +17.5/-12.5 |
0.05*od＜wt≤0.11*od | ±12.5 | |
wt>0.11*od | ±10 | |
320＜od≤660 | wt≤0.05*od | +22.5/-12.5 |
0.05*od＜wt≤0.09*od | +15/-12.5 | |
wt>0.09*od | +12.5/-10 |
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 | - |
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