DIN1360 St 44.4 seamless steel pipe chemical composition
DIN1360 St 44.4 seamless steel pipe upper yield stress for a design temperature
Steel grade |
Upper yield stress for a design temperature |
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|
Symbol |
Material number |
50°C |
200°C |
250°C |
300°C |
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|
and a wall thickness |
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|
≤16 |
>16 ≤40 |
>40 ≤65 |
≤16 |
>16≤40 |
>40≤65 |
≤16 |
>16 ≤40 |
>40 ≤65 |
≤16 |
≤16 |
>40 ≤65 |
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|
N/mm2 |
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|
St 44.4 |
1.0257 |
275 |
265 |
255 |
215 |
205 |
200 |
195 |
185 |
180 |
165 |
160 |
155 |
DIN1360 St 44.4 seamless steel pipe chemical composition
Chemical composition |
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|
Steel grade |
Type of deoxidation (RR.fully killed) |
Chemical composition, % by mass |
Addition of nitrogen fixing elements (e.g.no less than 0.020% Al total) |
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|
Symbol |
Material number |
C |
Si |
Mn |
P |
S |
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|
max |
max |
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|
St 44.4 |
1.0257 |
RR |
0.20 |
0.35 |
>=0.40 |
0.040 |
0.040 |
Yes |
DIN1360 St 44.4 seamless steel pipe mechanical property
Steel grade |
Upper yield stress Reh for wall thickness in mm |
Tensile strength Rm N/mm2 |
Elongation after fracture A5 |
Impact energy ISO V-notch test pieces at+20°C |
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|
Symbol |
Material number |
Up to 16 |
16-40 |
40-65 |
longitudinal |
transverse |
longitudinal |
transverse |
|
|
N/mm2 min |
% min |
/ min |
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|
St 44.4 |
1.0257 |
275 |
265 |
255 |
420 to 550 |
21 |
19 |
43 |
27 |
Delivery condition: Normalized, Bright Annealing.
Certificate: ISO9001 TUV
Packing:
1. Standard export bundle wrapped with strong steel strip
2. Wooden case
3. Nylon packed
Payment: T/T
Delivery: With 40 days of order confirmation
DIN1360 St 44.4 seamless steel pipe surface
All surfaces have been 100% visually inspected. The surface condition complies with API 5L Annex E.
External surface of pipe shall be coated with a layer of varnish.
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