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420 Stainless Steel Coil

Introduction

SS420 is a martensitic stainless stee that provides corrosion resistance similar to SS410 plus increased strength and hardness.It is magentic in both annealed and hardened conditions.Maximum corrosion resistance only in the fully hardened and stress relieved condition.

Grade	420 stainless steel coil
Thickness	0.3-6mm
Widthness	1000mm, 1219mm, 1524mm or as customized
Brand name	TISCO,BAO Steel,ZPSS,BAO XIN,LISCO..
Standard	JIS, AISI, ASTM, GB, DIN, EN ,etc.
Finish	2B, Hairline, No.4, BA, 8K mirror, etc.
Certification	SGS
Packaging	Standard exporting packing; seaworthy package.
MOQ	5 Tons

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Stainless steel wire rod,stainless steel pipe/tube,stainless steel flat bar,stainless steel angel bar...

Annealing:
Annealing is achieved by heating to above 816℃ and 899℃for 90 minutes per 25mm thickness followed by air quenching.Controlled atmospheres are recommended in order to avoid excessive oxidation of the surface.

Welding:
The martensitic class of stainless steeks has limited weldability due to its hardnability.Special consideration is required to avoid cold cracking by preheating to 260℃.Post-weld heat treatment should be considered to achieve required properties.This particular alloy is generally considered to have the best weldability of this stainless class.

Specification

Chemical Composition and mechanical properties:

420	C	Si		Mn	P		S	Ni	Cr
	0.3-0.4	≤1.0		≤1.00	≤0.04		≤0.03	≤0.75	12.00~14.00
tensile strength σb (MPa)			yield strength σ0.2(MPa)			elongation δ5(%)			Hardness HB
≥635			≥310			≥25			≤223

tolerance range of 420 cold rolled stainless steel coil
Thickness	Large Tolerance	Normal Tolerance	Small Tolerance	No Tolerance
0.4MM	0.3-0.32	0.33-0.37	0.37-0.39	≥0.39
0.5MM	0.4-0.42	0.43-0.47	0.47-0.49	≥0.49
0.6MM	0.5-0.52	0.53-0.56	0.57-0.59	≥0.59
0.7MM	0.6-0.62	0.63-0.67	0.67-0.69	≥0.69
0.8MM	0.7-0.72	0.73-0.77	0.74-0.79	≥0.79
0.9MM	0.8-0.82	0.83-0.87	0.87-0.89	≥0.89
1.0MM	0.89-0.9	0.91-0.94	0.94-0.99	≥0.99
1.2MM	1.02-1.08	1.09-1.15	1.16-1.18	≥1.18
1.5MM	1.32-1.38	1.39-1.45	1.46-1.48	≥1.48
2.0MM	1.72-1.79	1.8-1.86	1.87-1.9	≥1.9
2.5MM	2.23-2.36	2.32-2.42	2.42-2.47	≥2.48
3.0MM	2.7-2.77	2.78-2.85	2.85-2.9	≥2.9

tolerance range of 420 hot rolled stainless steel coil
Thickness	Large Tolerance	Normal Tolerance	Small Tolerance	No Tolerance
3.0MM	2.6-2.75	2.75-2.85	2.86-2.9	≥2.9
4.0MM	3.5-3.6	3.6-3.75	3.76-3.95	≥3.95
5.0MM	4.5-4.6	4.6-4.75	4.75-4.95	≥4.95
6.0MM	5.4-5.6	5.6-5.75	5.75-5.85	≥5.85
8.0MM	7.3-7.5	7.5-7.65	7.65-7.85	≥7.85
10.0MM	9.2-9.3	9.3-9.6	9.6-9.85	≥9.85
12.0MM	11.1-11.2	11.2-11.6	11.6-11.85	≥11.85
14.0MM	13.1-13.2	13.2-13.6	13.6-13.85	≥13.85

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