Baosteel Standard Series Steel

Grade & Application List

Application	Characteristics	Grade
Steel for automotive structural use (designation in accordance with Japanese standards)	For automotive structural parts such as automobile frames and wheels requiring formability.	SAPH310、SAPH370、 SAPH400、SAPH440
High-strength steel for automotive structural use (designation in accordance with Japanese standards)	For automotive structural parts such as automobile frames and wheels requiring good formability and high strength.	SPFH540、SPFH590
High-strength steel for automotive structural use(designation in accordance with German standards)	For structural components including automotive chassis beams requiring good cold formability and medium or high strength.	QStE340TM、QStE380TM、 QStE420TM、QStE460TM、QStE500TM
Steel for wheels	With good cold formability, for manufacturing rolled wheel rims and spokes of automobile wheels.	B330CL、B380CL、B420CL
Steel for vehicle chassis beams	With good strength and formability, for the production of automotive chassis beams and cross members.	B320L、B420L、B51、B510DL、B550L
Steel for drive shafts	For manufacturing automotive drive shaft tubes.	B440QZR、B480QZR
Steel for axle housings	For manufacturing automotive axle housings.	B440QK

Equivalent Grades

Q/BQB310-2009	YB/T 4151-2006
B330CL	330CL
B380CL	380CL
B420CL

Q/BQB310-2009	GB/T 3273-2005
B320L	-
B420L	420L
B510L	510L
B510DL	-
B550L	550L

Q/BQB310-2009	JIS G3113-2006
SAPH310	SAPH310
SAPH370	SAPH370
SAPH400	SAPH400
SAPH440,B440QK	SAPH440

Q/BQB310-2009	JIS G3134-2006
SPFH540	SPFH540
SPFH590	SPFH590

Q/BQB310-2009	SEW092:95	EN10149-2:1995	IOS6930-1:2001	SAEJ1392:2001	GB/T20887.1-2007
QStE340TM	QStE360TM	S355MC	FeE355	050XLK	HR355F
QStE380TM	QStE380TM	-	-	-	HR380F
QStE420TM	QStE420TM	S420MC	FeE420	060XLK	HR420F
QStE460TM	QStE460TM	S460MC	FeE460	-	HR460F
QStE500TM	QStE500TM	S500MC	FeE500	070XLK	HR500F

Grade	Chemical composition (ladle analysis)
Grade	C	Si	Mn	P	S	Alt	其它 Others
QStE380TM	≤0.12	≤0.50	≤1.40	≤0.030	≤0.025	≥0.015	Nb≤0.09 V≤0.20 Ti≤0.15
QStE420TM	≤0.12	≤0.50	≤1.50	≤0.030	≤0.025	≥0.015	Nb≤0.09 V≤0.20 Ti≤0.15
QStE460TM	≤0.12	≤0.50	≤1.60	≤0.030	≤0.025	≥0.015	Nb≤0.09 V≤0.20 Ti≤0.15
QStE500TM	≤0.12	≤0.50	≤1.70	≤0.030	≤0.025	≥0.015	Nb≤0.09 V≤0.20 Ti≤0.15
SAPH310	≤0.10	≤0.30	≤0.50	≤0.035	≤0.035	≥0.010	-
SAPH370	≤0.21	≤0.30	≤0.75	≤0.035	≤0.035	≥0.010	-
SAPH400	≤0.21	≤0.30	≤1.40	≤0.030	≤0.025	≥0.010	-
SAPH440	≤0.21	≤0.30	≤1.50	≤0.030	≤0.025	≥0.010	-
SAPH540	≤0.15	≤0.50	≤1.80	≤0.025	≤0.025	≥0.010	-
SAPH590	≤0.18	≤0.60	≤2.00	≤0.025	≤0.025	≥0.010	-
B440QK	≤0.21	≤0.35	≤1.80	≤0.030	≤0.025	≥0.010	-
B330CL	≤0.10	≤0.30	≤0.50	≤0.030	≤0.025	≥0.010	-
B380CL	≤0.12	≤0.30	≤1.20	≤0.030	≤0.025	≥0.010	-
B420CL	≤0.12	≤0.30	≤1.50	≤0.030	≤0.025	≥0.010	-
B320L	≤0.10	≤0.30	≤0.50	≤0.030	≤0.035	≥0.010	-
B420L	≤0.12	≤0.50	≤1.50	≤0.030	≤0.025	≥0.010	-
B510L	≤0.16	≤0.50	≤1.60	≤0.030	≤0.025	≥0.010	-
B510DL	≤0.18	≤0.30	≤1.60	≤0.025	≤0.020	≥0.010	-
B550L	≤0.16	≤0.50	≤1.60	≤0.030	≤0.025	≥0.010	-
B440QZR	≤0.12	≤0.50	≤1.30	≤0.030	≤0.025	-	-
B480QZR	≤0.16	≤0.50	≤1.50	≤0.030	≤0.035	-	-
The minimum aluminium content is not required if other alloy elements be added to improve the properties.

Mechanical Properties

Tensile test(longitudinal)
Grades	Upper yield strength MPa	Tensile strength MPa	Elongation % L0=80mm,b=20mm L0=5.65		180° Bend test Inner diameter
			Nominal thickness mm
			<3.0	≥3.0
QStE340TM	≥340	420~540	≥19	≥25	0.5a
QStE380TM	≥380	450~590	≥18	≥23
QStE420TM	≥420	480~620	≥16	≥21
QStE460TM	≥460	520~670	≥14	≥19	1a
QStE500TM	≥500	550~700	≥12	≥17	1a

Tensile test(transverse)
Grades	Upper yield strength MPa	Tensile strength MPa	Yied ratio	Elongation % L0=80mm,b=20mm L0=5.65 %	180° Bend test Inner diameter
B330CL	≥225	330~430	-	≥33	0a
B380CL	≥260,thickness ≤5.5mm	380~480	-	≥32	0.5a
	≥235 thickness >5.5~10.0mm	380~480	-	≥28	0.5a
	≥220, thickness >10.0~14.0mm	380~480	-	≥25	0.5a
B420CL	≥290	420~520	-	≥28	0.5a
B440QZR	≥320	440~570	-	≥15	1a
B480QZR	≥355	480~580	-	≥21	1a
B320L	≥215	320~420	-	≥27	0a
B420L	≥305	420~520	-	≥25	0.5a
B510L	≥355	510~630	-	≥24	0.5a
B510DL	≥355	510~630	≤0.80	≥24	1a
B550L	≥400	550~670	-	≥23	1a

Tensile test(transverse)
Grades	Upper yield strength MPa	Tensile strength MPa	% Elongation L0=50mm,b=25mm				180° Bend test Inner diameter
			Nominal thickness mm				Nominal thickness mm
			1.6~<2.0	2.0~<2.5	2.5~<3.25	3.25~6.0	<3.25	≥3.25
SPFH540	≥355	≥540	≥21	≥22	≥23	≥24	2a	3a
SPFH590	≥420	≥590	≥19	≥20	≥21	≥22	3a	3a

Tensile strength(longitudinal)

Grades

Tensile
strength
MPa

Upper yield strength
MPa

% Elongation

L0=50mm,b=25mm

180°

Bend test

Inner diameter

Nominal thickness mm

SAPH310d

≥310

≥185

≥175

≥33

≥34

≥36

≥38

≥40

≥41

SAPH370

≥370

≥225

≥215

≥32

≥33

≥35

≥36

≥37

≥38

SAPH400

≥400

≥255

≥235

≥31

≥32

≥34

≥35

≥36

≥37

SAPH440

≥440

≥305

≥295

≥275

≥29

≥30

≥32

≥33

≥34

≥35

SAPH310d

≥310

≥185

≥175

≥33

≥34

≥36

≥38

≥40

≥41

Available Size Range

Baosteel Standard Series Steel

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