Melt-extracted Stainless Steelfiber

Melt-extracted Stainless Steelfiber - details see: https://www.buildingsupplieshub.com/melt-extracted-stainless-steelfiber-10067857

Type: Other Fireproofing Materials

Place of Origin: China (Mainland)

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Product introduction

Raw material is stainless steel ingot. Melt the ingot to 1500 ~ 1600 °C in the electric stove, and then approach the steel liquid from its surface with a high-speed rotating melt-extracting wheel, which is carved by much groove in accordance with the size requirement of steel fiber size requirement. When melt-extracting wheel comes down to the steel liquid surface, the steel liquid will be blew out by groove and be injected by high speed rotating centrifugal force to cooling and molding very rapidly. Thus melt-extracting wheel must be connected with water to keep cooling speed. This method could produce steel fiber of different materials and sizes according to customers’ requirements.

Properties

Alloy Property	(GA)330	(GB)310	(GC)304	(GD)446	(GE)430	NAs430A
Melting point °C	1400~1425°C	1400~1450°C	1400~1425°C	1425~1510°C	1425~1510°C	1500-1580°C
876°C Elastic modulus (10⁴Mpa)	13.4	12.4	12.4	9.56	8.27	8.82
870°C Tensile strength (Mpa)	193	152	124	52.7	46.9	58
870°C Linear expansion coefficient (10^-6/°C)	17.64	18.58	20.16	13.14	13.68	5.75
500°C Heat Conduction	21.6	18.7	21.5	24.4	26.3	28.6
Specific Gravity under room temperature (g/cm³)	8	8	8	7.5	7.8	7.8
Weight loss after 1000h of Circulation oxidation under 928 °C (%)	18	13	70(100hours)	4	70(100hours)	0.5
Concentration in the air-Circulation state	1035	1035	870	1175	870	1476
Gasification temperature (°C)-Continuous state	1150	1150	925	1095	815	1149
Corrosion rate in H₂S (mil/yr)	/	100	200	100	200	/
Highest using temp. in SO₂(°C)	/	1050	800	1025	800	/
Corrosion rate in natural gas under 815 °C (mil/yr)	? /	3	/	4	12	/
Corrosion rate in Coke oven gas under 982 °C (mil/yr)	75	25	225	14	236	6
Nitriding rate in Anhydrous ammonia under 525°C(mil/yr)	20	55	80	175	<GC >GD	110
Corrosion rate in H2 under 454 °C (mil/yr)	/	2.3	48	8.7	21.9	/
982°C, 25h,40 cycles, alloy adding carbon after Solid carbide (%)	0.08	0.02	1.4	0.07	1.03	/
NAS430A is latest stainless steel in Japan. Almina content and melting point are both high. It is superior than other steel because of the protection of Al₂O₃membrane.
Main advantages: Small heat shrinkable ratio, tiny distortion under rapid-cooling or rapid-heating environment, which is 2-3 times of that of other steel fiber. Its wear resistance (hardness) is over 1.5 times than that of other steel fiber. Acidification resistance and oxidative stability in high temperature: implemented for 500 cycles in repeated Oxidation test (1000 °C * 30 minutes heating, cooling for 10 minutes), the oxidation is just 0.5 mg/cm2. This means it has very strong oxidation resistance, which is 3-6 times of that of other fiber.

Brand	Chemical compostion %
Brand	C	P	Mn	Si	Cr	Ni
330	≤0.20	≤0.04	≤2.0	≤0.75	17—20	34—37
310	≤0.20	≤0.04	≤2.0	≤1.50	24—26	19—22
304	≤0.20	≤0.04	≤2.0	≤2.00	18—20	8—11
446	≤0.20	≤0.04	≤1.5	≤2.00	23—27	—
430	≤0.20	≤0.03	≤1.0	≤2.00	16—18	—
NAS430A	≤0.20	≤0.03	≤0.50	≤0.50	16-18	—

Name	Steel fiber Size (mm)				Allowable deviation (%)
Length (h)	20	25	30	35	±15
Width(B)	0.5-1	0.5-1	0.5-1	0.5-1	+8, -5
Thickness (H)	0.2-0.75	0.2-0.75	0.2-0.75	0.2-0.75	±0.1