ST37.4 EN10305 Seamless Steel Tubes
Grade:St37.4
Outer diameter:10.3-711mm
Wall thickness:2-100mm
Length:5.8-12m or random
Type:Seamless (cold drawn) or ERW
Ends:Plain ends or bevel ends
Delivery Conditions: BK,BKS,BKW,NBK,GBK( As drawn, quenched and tempered, normalized, annealed, stress-relieved)As different requirements,It including pickling,etc. AS per Standard.
DIN1630 St 37.4 seamless steel pipe upper yield stress for a design temperature
| Steel grade | Upper yield stress for a design temperature | ||||||||||||
| Symbol | Material number | 50°C | 200°C | 250°C | 300°C | ||||||||
| and a wall thickness | |||||||||||||
| ≤16 | >16 ≤40 | >40 ≤65 | ≤16 | >16≤40 | >40≤65 | ≤16 | >16 ≤40 | >40 ≤65 | ≤16 | ≤16 | >40 ≤65 | ||
| N/mm2 | |||||||||||||
| St 37.4 | 1.0255 | 235 | 225 | 215 | 185 | 175 | 170 | 165 | 155 | 150 | 140 | 135 | 130 |
| Chemical composition | ||||||||
| 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) | |||||
| Symbol | Material number | C | Si | Mn | P | S | ||
| max | max | |||||||
| St 37.4 | 1.0255 | RR | 0.17 | 0.35 | >=0.35 | 0.040 | 0.040 | Yes |
DIN1630 St 37.4 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 | |||||
| Symbol | Material number | Up to 16 | 16-40 | 40-65 | longitudinal | transverse | longitudinal | transverse | |
| N/mm2 min | % min | / min | |||||||
| St 37.4 | 1.0255 | 235 | 225 | 215 | 350 to 480 | 25 | 23 | 43 | 27 |
Main Application: to be used in hydraulic systems, automobile and in the occasion where the high precision, brightness cleanness and mechanical properties of the tube are required.
Factory test and other terms:
1.Hydrostatic or Nondestructive Electric Test
2.Heat Treatment: according to Standard
3.Surface Condition:According to Standard.
4.Grain Size:According to standard
5.Sampling:flattening,flaring,grain size,Marking
6.we provide bevel end,plastic cap, varnish coating, oiled or black painted to prevent rustand other packing
service.
