Technical conditions for plates of SA299GrA SA299GrA manufacturer from China Gloria Steel

Technical conditions for plates of SA299GrA

Price:	2000.0~5000.0 USD
Payment Terms:	T/T,L/C
Place of Origin:	Guangdong, China (Mainland)


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Product Detail

Model No.: SA299GrA

Production Capacity: 3000~5000T

Delivery Date: 30 days

Means of Transport: Ocean

Packing: Standard seaworthy export p...

The technical conditions apply to plates of SA299GrA with thickness range 25mm-200mm for weldable boiler and other pressure vessel tank.

Technical conditions for plates of SA299GrA

1. Scope

The technical conditions apply to plates of SA299GrA with thickness range 25mm-200mm for weldable boiler and other pressure vessel tank.

2. Adopt standard:

ASME SA299/SA299M Standard Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon

ASME SA20/SA20M Standard Specification for General Requirements for Steel Plates for Pressure Vessels

ASME SA370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products

3. Dimension, Shape, Weight and Permissible Deviation

The dimension, shape, weight and permissible deviation shall meet the requirements of ASME SA20/SA20M.

The thickness toleration: -0 mm/+3.5mm

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	V	Cr
Ladle analysis	Max 0.28	0.15- 0.40	0.90- 0.50	Max 0.020	Max 0.010	Max 0.25	Max 0.12	Max 0.03	Max 0.25
Product analysis	Max 0.28	0.13- 0.45	0.84- 1.62	Max 0.025	Max 0.015	Max 0.25	Max 0.12	Max 0.03	Max 0.25

Thickness

Ladle analysis

Max 0.28

0.15- 0.40

0.90- 0.50

Max 0.020

Max 0.010

Max 0.25

Max 0.12

Max 0.03

Max 0.25

Product analysis

Max 0.28

0.13- 0.45

0.84- 1.62

Max 0.025

Max 0.015

Max 0.25

Max 0.12

Max 0.03

Max 0.25

Note: Cu+Ni+Cr+Mo+V =< 0.70%

4.2 Steel making process: EAF+LF/VD

4.3 Mechanical properties

The SWHT mechanical properties of SA299GrA 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=4a
25-200	Min 275	515-655	Min 19	180C un-cracked

Thickness mm

Yield strength MPa

Tensile strength MPa

Elongation %

Bend test

D=4a

25-200

Min 275

515-655

Min 19

180C un-cracked

4.4 Impact properties

Impact test in the longitudinal and transverse for plates of SA299GrA shall meet the requirements per table 3.

Table 3 Impact properties

Charpy-V Impact Test temp. Celsius degree	Transverse
Average impact energy
0 C	Min 27J

Charpy-V Impact

Test temp.

Celsius degree

Transverse

Average impact energy

0 C

Min 27J

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)	>25-200	237	227	216	202	196	191
Rm Min (MPa)	>25-150	480
Rm Min (MPa)	>150-200	450

4.6 SWHT: Simulated Post-Weld Heat Treatment of Mechanical Test Coupons shall be prepared in 610+/-5 C with min.8 minute per each mm of thickness.

4.7 Surface quality

The surface quality of plates shall be accordance with ASTM A20/A20M.

4.8 Ultrasonic inspection

Plates shall be ultrasonic inspected per ASTM A578/A578M level C.

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)	ASTM A20/A20M	ASME SA751	/
Product analysis	1 (Per product pc)	ASTM A20/A20M	ASME SA370	SWHT
Tensile test	1 (per heat treatment pc)	ASTM A20/A20M	ASME SA370
Charpy-V impact test at 0C	3 (per heat treatment pc)	ASTM A20/A20M	ASME SA370
S7 High TEMP tensile test	6 (per heat treatment pc)	ASTM A20/A20M	ASME SA370
Ultrasonic test	Each product pc	ASTM A578/A578M		+N