1. Standard 

ASTM Standards：ASTM A213

2. Chemical Composition

	C	Mn	P	S	Si	Cr	Ni	Ti
Min	0.04					17	9	4（C+N）
Max	0.10	2.0	0.045	0.030	1.0	19	12	0.7
Actual value	0.048	0.85	0.035	0.002	0.62	17.55	9.48	0.45

3. Mechanical Properties

Mechanical Properties	Tensile Strength MPa	Yield Strength MPa	Elongation %	Hardness HRB
Min（標(biāo)準(zhǔn)）	515	205	35
Max（標(biāo)準(zhǔn)）				90
Actual value	585	260	48	72

4. Typical Size

Size	Outside Diameter mm	Permissible Variations in Outside Diameter mm	Wall Thickness mm	Average Wall Permissible Variations in Wall Thickness
60.3×4	60.3	-0.38~+0.38	4	0~+22%S

Note: the control scope of theStandard.：OD：-0.38~+0.38mm，WT：0~+22%S

5. Typical Application Environment

1) Automobile

2) Boiler

3) Architecture

4) Machine  manufacturing

5) Fluid Service

6) Power  station

7) Solar power station

8) Chemical mechanical

9) Ships

10) Automobile chassis