Hot Rolled Pickled and Oiled

Hot Rolled Pickled and Oiled Steel

Once Hot Rolled Coils are produced on Hot Strip Mills from Slabs, it can be further pickled to produce Hot Rolled Pickled and Oiled Coils.

General exposure to oxygen in the air creates oxide layers (or scales), on the surface of the steel. The steel is dipped into tanks of hydrochloric acid, causing a complex reaction that almost removes this scaling entirely.

Prior to treatment, any surface particles such as dirt, dust, oil, rust, paint, tape or any other residues or substances require removal by alkaline, or other alternate cleaning methods. The primary advantage or purpose of the pickling and oiling conditioning is to reinforce the steel's protective properties, in particular, rust.

The Benefits of Hot Rolled Pickled and Oiled Steel

When metal is pickled, contaminants and other unwanted elements are removed. These include but are not limited to impurities such as stains and rust. An acidic solution is used to treat the metal, in order to make the steel's surface free from these impurities. More commonly known in the industry, the 'dip' or acid solution is referred to as pickle liquor.

Hot Rolled Pickled And Oiled steel is especially useful for cutting, and punching (piercing).

Hot Rolled Pickled And Oiled steel is used for a wide range of applications, from simple bends to complex draws or structural applications that require a specific strength level. Another advantage of pickling is that it helps mitigate any pre-treatment process.

Specific Uses and Applications of Hot Rolled Pickled and Oiled Steel

Hot Rolled, Pickled and Oiled steel is used for a variety of purposes. Impact Steel supplies Hot Rolled Pickled and Oiled steel products with remarkable workability, suiting projects that require a more functional presentation structure. Hot Rolled Pickled and Oiled steel is ideal for welding finishes and reinforcements.

Our Hot Rolled Pickled and Oiled product range provides the ability for our customers to select the steels that best suit their specific design criteria.

Typical uses consist of:

Structural sections

Tanks

Light poles

Gas cylinders

Racking

Shelving

Guardrails

Tubing

Simple pressings

Hidden appliance panels

HRPO is available in IS 1079 , IS 2062, IS 5986 and JIS Grades like SAPH 370, SAPH 440, SPFH 540, SPFH 590 and in EN Grades like S355, S420, S550 and S700

IS 1079 Grade Specification (Only for reference, for actual grades please refer the relevant official standards)

Chemical Properties

Quality			Constituent, Percent, Max
Designation	Old Designation	Name	Carbon	Manganese	Phosphorus	Sulphur	Micro- alloy
HR0	(New)	Ordinary	0.25	1.7	0.05	0.045	-
HR1	O	Commercial	0.15	0.6	0.05	0.035	-
HR2	D	Drawing	0.1	0.45	0.04	0.035	-
HR3	DD	Deep Drawing	0.08	0.4	0.035	0.03	-
HR4	EDD	Extra Deep Drawing	0.08	0.35	0.03	0.03	-
HR5	(New)	IF	0.004	0.25	0.02	0.02	0.15
HR6	(New)	Micro- alloyed	0.16	1.6	0.02	0.02	0.2
HR6	(New)	Dual Phase*	0.16	2	0.05	0.02	0.15

Tensile Properties

Quality			Tensile Strength Rm max MPa	Percentage Elongation After Fracture A 3), 4) min
Designation	Old Designation	Name		t < 3		t >3
Designation	Old Designation	Name		Gauge length Lo = 80 mm	Gauge length Lo = 50 mm	Gauge Length Lo = 5.65 √So	Gauge Length Lo = 50 mm
HRO	(New)	Ordinary	*	*	*	*	*
HR1	O	Commercial	440	23	24	28	29
HR2	D	Drawing	420	25	26	30	31
HR3	DD	Deep Drawing	400	28	29	33	34
HR4	EDD	Extra Deep Drawing	380	31	32	36	37
HR5	(New)	IF, IF-HS and BH	-	-	-	-	-
HR6	(New) MA	YST340	400-500	*	*	26	27
		YST380	450-570	*	*	24	25
		YST450	500-620	*	*	20	21
	(New) Dual phase	DP-590	590 min	15	13	15	13
	(New) Dual phase	DP-780	780 min	11	10	11	10

Mechanical Properties

Properties	Grade A	Grade B	Grade C
>Y. S. (MPa) min <20mm 20-40mm >40mm	250 240 230	250 240 230	250 240 -
>U.T.S (MPa) min	410	410	410
>EI %(min) 5.65vA	23	23	23

Bend Test (IS 1599)

Thickness	Grade A	Grade B	Grade C
<25mm	3t	2t	2t
>25mm	3t	3t	2t

Impact Test (charpy V notch)*

Thickness	Temp.	Grade A	Grade B	Grade C
8-70mm	0 degree C	-	27J	-
8-32mm	-20 degree C	-	-	27J

Chemical Composition ( Product Analysis ) IS 2062

Grades	C (Max)	Mn (Max)	P (Max)	S (Max)	Si (Max)	A1 (Min)	Nb (Max)	V (Max)	Ti (Max)	CE (Max)
Grade A	0.23	1.50	0.035	0.035	0.30	0.02	-	-	-	0.42
Grade B	0.22	1.50	0.035	0.035	0.30	0.02	-	-	-	0.41
Grade C	0.20	1.50	0.035	0.035	0.30	0.02	-	-	-	0.39

*Average of three tests

Thickness Range
Grade A	8-150mm
Grade B	8-70mm
Grade C	8-32mm
Heat Treatment	Online Self Normalising
Inspection Agency	JSW / Customer / Other Inspection agencies
Remarks	Nitrogen content 90 PPM max.

HR Steel Grades for forming operations

Chemical composition (Product Analysis)

Grades	C (Max)	Mn (Max)	P (Max)	S (Max)	Si (Max)	A1 (Min)	Nb (Max)	V (Max)	Ti (Max)	CE (Max)
Fe 330	0.17	1.00	0.035	0.035	0.30	0.02	-	-	-	-
Fe 360	0.17	1.20	0.035	0.035	0.30	0.02	-	-	-	-
Fe 410	0.20	1.30	0.035	0.035	0.30	0.02	-	-	-	0.42
Fe 510	0.20	1.50	0.035	0.035	0.30	0.02		0.02 - 0.08 to be added in single / Combination**		0.45

Mechanical Properties

Properties	Fe330	Fe360	Fe410	Fe510
Y.S (MPa) min	205	235	255	355
U.T.S. (MPa)	330-440	360-470	410-520	510-620
EI % (min) 5.65vA	25	25	23	20

Bend Test (IS 1599)

Thickness	Fe330	Fe360	Fe410	Fe510
<12mm	1 t	1 t	2 t	2 t
>12-25mm	2 t	2 t	3 t	3 t

Impact Test (charpy V notch)*

Thickness	Temp.	Fe330	Fe360	Fe410	Fe510
12-25mm	0 degree C	27 J	27 J	27 J	27 J