1. Standard 

American Standard：ASME SB167

2. Chemical Composition

Elements	C	Mn	P	S	Si	Cr	Mo	Ni	Ti	Nb	Cu	Fe	Al
Min						27.00		58.0				7.0
Max	0.05	0.5		0.015	0.5	31.0					0.5	11.0
Actual value	0.02	0.09		0.003	0.35	30.5		62.0			0.1	10.5

3. Mechanical Properties

OD	Mechanical Properties	Tensile Strength MPa	Yield Strength MPa	Elongation %	Hardness HBW/HRC
OD≤127mm	Min	586	240	30
	Max
	Actual value	603	267	42
OD>127mm	Min	586	205	35
	Max
	Actual value	595	232	51

 4.Typical Size

Size	Outside Diameter mm	Tolerance of Outside Diameter mm	Wall Thickness mm	Tolerance of  Wall Thickness
114.3*4	114.3	±0.51	4	±12.5%S

     Note:Standard requirements control range:OD：±0.515mm，WT：±12.5%S

5. Typical Application Environment

    1) Steam generator used in pressurized water reactor 
    2) Military thermal components