Technical conditions for plates of 13MnNiMo5-4

1. Scope
The technical conditions apply to plates of 13MnNiMo5-4 with thickness range 25mm-200mm for weldable boiler and other pressure vessel tank.
2. Adopt standard:
EN10028-2:2003 Non-alloy and alloy steels with specified elevated temperature properties
EN10029:1991 Tolerances on dimensions, shape and mass for hot rolled steel plates 3 mm thick or above
EN10163-2:1991 Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections -Part 2: Plate and wide flats
EN10160-2:1999 Ultrasonic testing of steel flat product of thickness equal or greater than 6 mm reflection method

3. Dimension, Shape, Weight and Permissible Deviation
The dimension, shape, weight and permissible deviation shall meet the requirements of EN10029:1991
The thickness toleration: EN10029-1991 table 1 Class B.
4. Technical conditions
4.1 Chemical composition (Ladle analysis)
The chemical composition of plates shall be accordance with the following table 1.
Table 1 Chemical composition (Ladle analysis)
Thickness
mm C Si Mn P S Ni Mo Nb Cr Cu V
Ladle analysis 0.08- 0.15 0.10- 0.50 1.00- 1.60 Max 0.020 Max 0.010 0.60- 1.00 0.20- 0.40 0.005- 0.020 0.20- 0.40 Max 0.20 0.02- 0.05
Product analysis 0.06- 0.17 0.05- 0.56 0.95- 1.70 Max 0.020 Max 0.010 0.55- 1.05 0.15- 0.44 0.004- 0.025 0.15- 0.45 Max 0.20 0.02- 0.05

4.2 Steel making process: EAF+LF/VD
4.3 Mechanical properties
The SWHT mechanical properties of 13MnNiMo5-4 shall meet the requirement as table 2&3&4.
Table 2 Tensile properties
Thickness mm Yield strength MPa Tensile strength MPa Elongation % Bend test
D=3a
=<100 Min 390 570-740 Min 18 180C un-cracked
>100-125 Min 380   180C un-cracked
>125-150 Min 375   180C un-cracked

4.4 Impact properties
Impact test in the longitudinal and transverse for plates of 13MnNiMo5-4 shall meet the requirements per table 3.
Table 3 Impact properties
Charpy-V Impact
Test temp.
Celsius degree Transverse  Average impact energy
 20C 0C
 Min 39J Min 34J

4.5 Minimum values for the proof strength Rp0.2 at elevated temperatures shall meet the requirements per table 4.
Table 4 Tensile properties
Test TEMP Thickness mm 200C 250C 300C 350C 375C 400C
Rp0.2
Min (MPa) =<100 >=375 >=360 >=355 >=345 >=335 >=310
 >100-125 >=365 >=350 >=345 >=335 >=325 >=300
 >125-150 >=350 >=340 >=335 >=325 >=315 >=295
Rm
Min (MPa) =<150 >=535 >=520 >=515 >=515 >=510 >=490

4.6 SWHT: Simulated Post-Weld Heat Treatment of Mechanical Test Coupons shall be prepared in 610+/-5 C with min.5 minute per each mm of thickness.
4.7 Surface quality
The surface quality of plates shall be accordance with EN10163-2 B3..
4.8 Ultrasonic inspection
Plates shall be ultrasonic inspected per EN10160 S2E2..
4.9 Test method and inspection rules
Test items, sampling quantity, sampling method and test method shall conform to table 5.
Table 5 Test items for plates
Test item Quantity, Piece Sampling method Test method Sampling conditions
Ladle analysis 1 (per furnace) EN10028 EN10028 /
Product analysis 1 (Per product pc) EN10028 EN10028 SWHT
Tensile test 1 (per heat treatment pc) EN10028 EN10028 
Charpy-V impact test at 0C 3 (per heat treatment pc) EN10028 EN10028 
S7 High TEMP tensile test 6 (per heat treatment pc) EN10028 EN10028 
Ultrasonic test Each product pc EN10160 +N

5. Package, marking and certificate
Package, marking and certificate shall conform to EN10028.
6. The third party inspection
The chemical composition, tensile test and Charpy V impact test for plates of 13MnNiMo5-4 shall be witnessed by surveyor of client.
7. Delivery conditions
The delivery conditions for plates of 13MnNiMo5-4 shall be Normalized+ Tempered, The Normalized temperature is 890-950 C degree, and Tempered temperature no less than 620 C degree.
8. Other requirements
The other requirements for plates of 13MnNiMo5-4 shall be accordance with EN10028-2.
MTC accordance with EN10204: 2004 3.1

More technical details and the MTC require please visit our web site: www.gloriasteel.com or contact us.

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